vender

vendor/composer/autoload_files.php

@@ -0,0 +1,67 @@
+<?php
+
+// autoload_files.php @generated by Composer
+
+$vendorDir = dirname(dirname(__FILE__));
+$baseDir = dirname($vendorDir);
+
+return array(
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+    '9d8e013a5160a09477beb8e44f8ae97b' => $vendorDir . '/markbaker/matrix/classes/src/functions/adjoint.php',
+    '6e78d1bdea6248d6aa117229efae50f2' => $vendorDir . '/markbaker/matrix/classes/src/functions/antidiagonal.php',
+    '4623d87924d94f5412fe5afbf1cef31d' => $vendorDir . '/markbaker/matrix/classes/src/functions/cofactors.php',
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+    '5fef6d0e407f3f8887266dfa4a6c534c' => $vendorDir . '/markbaker/matrix/classes/src/operations/directsum.php',
+    '684ba247e1385946e3babdaa054119de' => $vendorDir . '/markbaker/matrix/classes/src/operations/subtract.php',
+    'aa53dcba601214d17ad405b7c291b7e8' => $vendorDir . '/markbaker/matrix/classes/src/operations/multiply.php',
+    '75c79eb1b25749b05a47976f32b0d8a2' => $vendorDir . '/markbaker/matrix/classes/src/operations/divideby.php',
+    '6ab8ad87a734f276a6bcd5a0fe1289be' => $vendorDir . '/markbaker/matrix/classes/src/operations/divideinto.php',
+);

vendor/markbaker/complex/README.md

@@ -0,0 +1,156 @@
+PHPComplex
+==========
+
+---
+
+PHP Class for handling Complex numbers
+
+Master: [![Build Status](https://travis-ci.org/MarkBaker/PHPComplex.png?branch=master)](http://travis-ci.org/MarkBaker/PHPComplex)
+
+Develop: [![Build Status](https://travis-ci.org/MarkBaker/PHPComplex.png?branch=develop)](http://travis-ci.org/MarkBaker/PHPComplex)
+
+[![Complex Numbers](https://imgs.xkcd.com/comics/complex_numbers_2x.png)](https://xkcd.com/2028/)
+
+---
+
+The library currently provides the following operations:
+
+ - addition
+ - subtraction
+ - multiplication
+ - division
+    - division by
+    - division into
+
+together with functions for 
+
+ - theta (polar theta angle)
+ - rho (polar distance/radius)
+ - conjugate
+ * negative
+ - inverse (1 / complex)
+ - cos (cosine)
+ - acos (inverse cosine)
+ - cosh (hyperbolic cosine)
+ - acosh (inverse hyperbolic cosine)
+ - sin (sine)
+ - asin (inverse sine)
+ - sinh (hyperbolic sine)
+ - asinh (inverse hyperbolic sine)
+ - sec (secant)
+ - asec (inverse secant)
+ - sech (hyperbolic secant)
+ - asech (inverse hyperbolic secant)
+ - csc (cosecant)
+ - acsc (inverse cosecant)
+ - csch (hyperbolic secant)
+ - acsch (inverse hyperbolic secant)
+ - tan (tangent)
+ - atan (inverse tangent)
+ - tanh (hyperbolic tangent)
+ - atanh (inverse hyperbolic tangent)
+ - cot (cotangent)
+ - acot (inverse cotangent)
+ - coth (hyperbolic cotangent)
+ - acoth (inverse hyperbolic cotangent)
+ - sqrt (square root)
+ - exp (exponential)
+ - ln (natural log)
+ - log10 (base-10 log)
+ - log2 (base-2 log)
+ - pow (raised to the power of a real number)
+ 
+ 
+---
+
+# Usage
+
+To create a new complex object, you can provide either the real, imaginary and suffix parts as individual values, or as an array of values passed passed to the constructor; or a string representing the value. e.g
+
+```
+$real = 1.23;
+$imaginary = -4.56;
+$suffix = 'i';
+
+$complexObject = new Complex\Complex($real, $imaginary, $suffix);
+```
+or
+```
+$real = 1.23;
+$imaginary = -4.56;
+$suffix = 'i';
+
+$arguments = [$real, $imaginary, $suffix];
+
+$complexObject = new Complex\Complex($arguments);
+```
+or
+```
+$complexString = '1.23-4.56i';
+
+$complexObject = new Complex\Complex($complexString);
+```
+
+Complex objects are immutable: whenever you call a method or pass a complex value to a function that returns a complex value, a new Complex object will be returned, and the original will remain unchanged.
+This also allows you to chain multiple methods as you would for a fluent interface (as long as they are methods that will return a Complex result).
+
+## Performing Mathematical Operations
+
+To perform mathematical operations with Complex values, you can call the appropriate method against a complex value, passing other values as arguments
+
+```
+$complexString1 = '1.23-4.56i';
+$complexString2 = '2.34+5.67i';
+
+$complexObject = new Complex\Complex($complexString1);
+echo $complexObject->add($complexString2);
+```
+or pass all values to the appropriate function
+```
+$complexString1 = '1.23-4.56i';
+$complexString2 = '2.34+5.67i';
+
+echo Complex\add($complexString1, $complexString2);
+```
+If you want to perform the same operation against multiple values (e.g. to add three or more complex numbers), then you can pass multiple arguments to any of the operations.
+
+You can pass these arguments as Complex objects, or as an array or string that will parse to a complex object.
+
+## Using functions
+
+When calling any of the available functions for a complex value, you can either call the relevant method for the Complex object
+```
+$complexString = '1.23-4.56i';
+
+$complexObject = new Complex\Complex($complexString);
+echo $complexObject->sinh();
+```
+or you can call the function as you would in procedural code, passing the Complex object as an argument 
+```
+$complexString = '1.23-4.56i';
+
+$complexObject = new Complex\Complex($complexString);
+echo Complex\sinh($complexObject);
+```
+When called procedurally using the function, you can pass in the argument as a Complex object, or as an array or string that will parse to a complex object.
+```
+$complexString = '1.23-4.56i';
+
+echo Complex\sinh($complexString);
+```
+
+In the case of the `pow()` function (the only implemented function that requires an additional argument) you need to pass both arguments when calling the function procedurally
+
+```
+$complexString = '1.23-4.56i';
+
+$complexObject = new Complex\Complex($complexString);
+echo Complex\pow($complexObject, 2);
+```
+or pass the additional argument when calling the method
+```
+$complexString = '1.23-4.56i';
+
+$complexObject = new Complex\Complex($complexString);
+echo $complexObject->pow(2);
+```

vendor/markbaker/complex/classes/Autoloader.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Complex;
+
+/**
+ *
+ * Autoloader for Complex classes
+ *
+ * @package Complex
+ * @copyright  Copyright (c) 2014 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
+ */
+class Autoloader
+{
+    /**
+     * Register the Autoloader with SPL
+     *
+     */
+    public static function Register()
+    {
+        if (function_exists('__autoload')) {
+            //    Register any existing autoloader function with SPL, so we don't get any clashes
+            spl_autoload_register('__autoload');
+        }
+        //    Register ourselves with SPL
+        return spl_autoload_register(['Complex\\Autoloader', 'Load']);
+    }
+
+
+    /**
+     * Autoload a class identified by name
+     *
+     * @param    string    $pClassName    Name of the object to load
+     */
+    public static function Load($pClassName)
+    {
+        if ((class_exists($pClassName, false)) || (strpos($pClassName, 'Complex\\') !== 0)) {
+            // Either already loaded, or not a Complex class request
+            return false;
+        }
+
+        $pClassFilePath = __DIR__ . DIRECTORY_SEPARATOR .
+                          'src' . DIRECTORY_SEPARATOR .
+                          str_replace(['Complex\\', '\\'], ['', '/'], $pClassName) .
+                          '.php';
+
+        if ((file_exists($pClassFilePath) === false) || (is_readable($pClassFilePath) === false)) {
+            // Can't load
+            return false;
+        }
+        require($pClassFilePath);
+    }
+}

vendor/markbaker/complex/classes/Bootstrap.php

@@ -0,0 +1,38 @@
+<?php
+
+include_once __DIR__ . '/Autoloader.php';
+
+\Complex\Autoloader::Register();
+
+
+abstract class FilesystemRegexFilter extends RecursiveRegexIterator
+{
+    protected $regex;
+    public function __construct(RecursiveIterator $it, $regex)
+    {
+        $this->regex = $regex;
+        parent::__construct($it, $regex);
+    }
+}
+
+class FilenameFilter extends FilesystemRegexFilter
+{
+    // Filter files against the regex
+    public function accept()
+    {
+        return (!$this->isFile() || preg_match($this->regex, $this->getFilename()));
+    }
+}
+
+
+$srcFolder = __DIR__ . DIRECTORY_SEPARATOR . 'src';
+$srcDirectory = new RecursiveDirectoryIterator($srcFolder);
+
+$filteredFileList = new FilenameFilter($srcDirectory, '/(?:php)$/i');
+$filteredFileList = new FilenameFilter($filteredFileList, '/^(?!.*(Complex|Exception)\.php).*$/i');
+
+foreach (new RecursiveIteratorIterator($filteredFileList) as $file) {
+    if ($file->isFile()) {
+        include_once $file;
+    }
+}

vendor/markbaker/complex/classes/src/Complex.php

@@ -0,0 +1,387 @@
+<?php
+
+/**
+ *
+ * Class for the management of Complex numbers
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Complex Number object.
+ *
+ * @package Complex
+ *
+ * @method float abs()
+ * @method Complex acos()
+ * @method Complex acosh()
+ * @method Complex acot()
+ * @method Complex acoth()
+ * @method Complex acsc()
+ * @method Complex acsch()
+ * @method float argument()
+ * @method Complex asec()
+ * @method Complex asech()
+ * @method Complex asin()
+ * @method Complex asinh()
+ * @method Complex atan()
+ * @method Complex atanh()
+ * @method Complex conjugate()
+ * @method Complex cos()
+ * @method Complex cosh()
+ * @method Complex cot()
+ * @method Complex coth()
+ * @method Complex csc()
+ * @method Complex csch()
+ * @method Complex exp()
+ * @method Complex inverse()
+ * @method Complex ln()
+ * @method Complex log2()
+ * @method Complex log10()
+ * @method Complex negative()
+ * @method Complex pow(int|float $power)
+ * @method float rho()
+ * @method Complex sec()
+ * @method Complex sech()
+ * @method Complex sin()
+ * @method Complex sinh()
+ * @method Complex sqrt()
+ * @method Complex tan()
+ * @method Complex tanh()
+ * @method float theta()
+ * @method Complex add(...$complexValues)
+ * @method Complex subtract(...$complexValues)
+ * @method Complex multiply(...$complexValues)
+ * @method Complex divideby(...$complexValues)
+ * @method Complex divideinto(...$complexValues)
+ */
+class Complex
+{
+    /**
+     * @constant    Euler's Number.
+     */
+    const EULER = 2.7182818284590452353602874713526624977572;
+
+    /**
+     * @constant    Regexp to split an input string into real and imaginary components and suffix
+     */
+    const NUMBER_SPLIT_REGEXP =
+        '` ^
+            (                                   # Real part
+                [-+]?(\d+\.?\d*|\d*\.?\d+)          # Real value (integer or float)
+                ([Ee][-+]?[0-2]?\d{1,3})?           # Optional real exponent for scientific format
+            )
+            (                                   # Imaginary part
+                [-+]?(\d+\.?\d*|\d*\.?\d+)          # Imaginary value (integer or float)
+                ([Ee][-+]?[0-2]?\d{1,3})?           # Optional imaginary exponent for scientific format
+            )?
+            (                                   # Imaginary part is optional
+                ([-+]?)                             # Imaginary (implicit 1 or -1) only
+                ([ij]?)                             # Imaginary i or j - depending on whether mathematical or engineering
+            )
+        $`uix';
+
+    /**
+     * @var    float    $realPart    The value of of this complex number on the real plane.
+     */
+    protected $realPart = 0.0;
+
+    /**
+     * @var    float    $imaginaryPart    The value of of this complex number on the imaginary plane.
+     */
+    protected $imaginaryPart = 0.0;
+
+    /**
+     * @var    string    $suffix    The suffix for this complex number (i or j).
+     */
+    protected $suffix;
+
+
+    /**
+     * Validates whether the argument is a valid complex number, converting scalar or array values if possible
+     *
+     * @param     mixed    $complexNumber   The value to parse
+     * @return    array
+     * @throws    Exception    If the argument isn't a Complex number or cannot be converted to one
+     */
+    private static function parseComplex($complexNumber)
+    {
+        // Test for real number, with no imaginary part
+        if (is_numeric($complexNumber)) {
+            return [$complexNumber, 0, null];
+        }
+
+        // Fix silly human errors
+        $complexNumber = str_replace(
+            ['+-', '-+', '++', '--'],
+            ['-', '-', '+', '+'],
+            $complexNumber
+        );
+
+        // Basic validation of string, to parse out real and imaginary parts, and any suffix
+        $validComplex = preg_match(
+            self::NUMBER_SPLIT_REGEXP,
+            $complexNumber,
+            $complexParts
+        );
+
+        if (!$validComplex) {
+            // Neither real nor imaginary part, so test to see if we actually have a suffix
+            $validComplex = preg_match('/^([\-\+]?)([ij])$/ui', $complexNumber, $complexParts);
+            if (!$validComplex) {
+                throw new Exception('Invalid complex number');
+            }
+            // We have a suffix, so set the real to 0, the imaginary to either 1 or -1 (as defined by the sign)
+            $imaginary = 1;
+            if ($complexParts[1] === '-') {
+                $imaginary = 0 - $imaginary;
+            }
+            return [0, $imaginary, $complexParts[2]];
+        }
+
+        // If we don't have an imaginary part, identify whether it should be +1 or -1...
+        if (($complexParts[4] === '') && ($complexParts[9] !== '')) {
+            if ($complexParts[7] !== $complexParts[9]) {
+                $complexParts[4] = 1;
+                if ($complexParts[8] === '-') {
+                    $complexParts[4] = -1;
+                }
+            } else {
+                // ... or if we have only the real and no imaginary part
+                //  (in which case our real should be the imaginary)
+                $complexParts[4] = $complexParts[1];
+                $complexParts[1] = 0;
+            }
+        }
+
+        // Return real and imaginary parts and suffix as an array, and set a default suffix if user input lazily
+        return [
+            $complexParts[1],
+            $complexParts[4],
+            !empty($complexParts[9]) ? $complexParts[9] : 'i'
+        ];
+    }
+
+
+    public function __construct($realPart = 0.0, $imaginaryPart = null, $suffix = 'i')
+    {
+        if ($imaginaryPart === null) {
+            if (is_array($realPart)) {
+                // We have an array of (potentially) real and imaginary parts, and any suffix
+                list ($realPart, $imaginaryPart, $suffix) = array_values($realPart) + [0.0, 0.0, 'i'];
+            } elseif ((is_string($realPart)) || (is_numeric($realPart))) {
+                // We've been given a string to parse to extract the real and imaginary parts, and any suffix
+                list($realPart, $imaginaryPart, $suffix) = self::parseComplex($realPart);
+            }
+        }
+        if ($imaginaryPart <> 0.0 && empty($suffix)) {
+            $suffix = 'i';
+        }
+
+        // Set parsed values in our properties
+        $this->realPart = (float) $realPart;
+        $this->imaginaryPart = (float) $imaginaryPart;
+        $this->suffix = strtolower($suffix);
+    }
+
+    /**
+     * Gets the real part of this complex number
+     *
+     * @return Float
+     */
+    public function getReal()
+    {
+        return $this->realPart;
+    }
+
+    /**
+     * Gets the imaginary part of this complex number
+     *
+     * @return Float
+     */
+    public function getImaginary()
+    {
+        return $this->imaginaryPart;
+    }
+
+    /**
+     * Gets the suffix of this complex number
+     *
+     * @return String
+     */
+    public function getSuffix()
+    {
+        return $this->suffix;
+    }
+
+    /**
+     * Returns true if this is a real value, false if a complex value
+     *
+     * @return Bool
+     */
+    public function isReal()
+    {
+        return $this->imaginaryPart == 0.0;
+    }
+
+    /**
+     * Returns true if this is a complex value, false if a real value
+     *
+     * @return Bool
+     */
+    public function isComplex()
+    {
+        return !$this->isReal();
+    }
+
+    public function format()
+    {
+        $str = "";
+        if ($this->imaginaryPart != 0.0) {
+            if (\abs($this->imaginaryPart) != 1.0) {
+                $str .= $this->imaginaryPart . $this->suffix;
+            } else {
+                $str .= (($this->imaginaryPart < 0.0) ? '-' : '') . $this->suffix;
+            }
+        }
+        if ($this->realPart != 0.0) {
+            if (($str) && ($this->imaginaryPart > 0.0)) {
+                $str = "+" . $str;
+            }
+            $str = $this->realPart . $str;
+        }
+        if (!$str) {
+            $str = "0.0";
+        }
+
+        return $str;
+    }
+
+    public function __toString()
+    {
+        return $this->format();
+    }
+
+    /**
+     * Validates whether the argument is a valid complex number, converting scalar or array values if possible
+     *
+     * @param     mixed    $complex   The value to validate
+     * @return    Complex
+     * @throws    Exception    If the argument isn't a Complex number or cannot be converted to one
+     */
+    public static function validateComplexArgument($complex)
+    {
+        if (is_scalar($complex) || is_array($complex)) {
+            $complex = new Complex($complex);
+        } elseif (!is_object($complex) || !($complex instanceof Complex)) {
+            throw new Exception('Value is not a valid complex number');
+        }
+
+        return $complex;
+    }
+
+    /**
+     * Returns the reverse of this complex number
+     *
+     * @return    Complex
+     */
+    public function reverse()
+    {
+        return new Complex(
+            $this->imaginaryPart,
+            $this->realPart,
+            ($this->realPart == 0.0) ? null : $this->suffix
+        );
+    }
+
+    public function invertImaginary()
+    {
+        return new Complex(
+            $this->realPart,
+            $this->imaginaryPart * -1,
+            ($this->imaginaryPart == 0.0) ? null : $this->suffix
+        );
+    }
+
+    public function invertReal()
+    {
+        return new Complex(
+            $this->realPart * -1,
+            $this->imaginaryPart,
+            ($this->imaginaryPart == 0.0) ? null : $this->suffix
+        );
+    }
+
+    protected static $functions = [
+        'abs',
+        'acos',
+        'acosh',
+        'acot',
+        'acoth',
+        'acsc',
+        'acsch',
+        'argument',
+        'asec',
+        'asech',
+        'asin',
+        'asinh',
+        'atan',
+        'atanh',
+        'conjugate',
+        'cos',
+        'cosh',
+        'cot',
+        'coth',
+        'csc',
+        'csch',
+        'exp',
+        'inverse',
+        'ln',
+        'log2',
+        'log10',
+        'negative',
+        'pow',
+        'rho',
+        'sec',
+        'sech',
+        'sin',
+        'sinh',
+        'sqrt',
+        'tan',
+        'tanh',
+        'theta',
+    ];
+
+    protected static $operations = [
+        'add',
+        'subtract',
+        'multiply',
+        'divideby',
+        'divideinto',
+    ];
+
+    /**
+     * Returns the result of the function call or operation
+     *
+     * @return    Complex|float
+     * @throws    Exception|\InvalidArgumentException
+     */
+    public function __call($functionName, $arguments)
+    {
+        $functionName = strtolower(str_replace('_', '', $functionName));
+
+        // Test for function calls
+        if (in_array($functionName, self::$functions)) {
+            $functionName = "\\" . __NAMESPACE__ . "\\{$functionName}";
+            return $functionName($this, ...$arguments);
+        }
+        // Test for operation calls
+        if (in_array($functionName, self::$operations)) {
+            $functionName = "\\" . __NAMESPACE__ . "\\{$functionName}";
+            return $functionName($this, ...$arguments);
+        }
+        throw new Exception('Function or Operation does not exist');
+    }
+}

vendor/markbaker/complex/classes/src/Exception.php

@@ -0,0 +1,13 @@
+<?php
+
+/**
+ * Exception.
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+class Exception extends \Exception
+{
+}

vendor/markbaker/complex/classes/src/functions/abs.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex abs() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the absolute value (modulus) of a complex number.
+ * Also known as the rho of the complex number, i.e. the distance/radius
+ *   from the centrepoint to the representation of the number in polar coordinates.
+ *
+ * This function is a synonym for rho()
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The absolute (or rho) value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ *
+ * @see    rho
+ *
+ */
+function abs($complex)
+{
+    return rho($complex);
+}

vendor/markbaker/complex/classes/src/functions/acos.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acos() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse cosine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse cosine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function acos($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    $square = clone $complex;
+    $square = multiply($square, $complex);
+    $invsqrt = new Complex(1.0);
+    $invsqrt = subtract($invsqrt, $square);
+    $invsqrt = sqrt($invsqrt);
+    $adjust = new Complex(
+        $complex->getReal() - $invsqrt->getImaginary(),
+        $complex->getImaginary() + $invsqrt->getReal()
+    );
+    $log = ln($adjust);
+
+    return new Complex(
+        $log->getImaginary(),
+        -1 * $log->getReal()
+    );
+}

vendor/markbaker/complex/classes/src/functions/acosh.php

@@ -0,0 +1,34 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acosh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic cosine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic cosine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function acosh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal() && ($complex->getReal() > 1)) {
+        return new Complex(\acosh($complex->getReal()));
+    }
+
+    $acosh = acos($complex)
+        ->reverse();
+    if ($acosh->getReal() < 0.0) {
+        $acosh = $acosh->invertReal();
+    }
+
+    return $acosh;
+}

vendor/markbaker/complex/classes/src/functions/acot.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acot() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse cotangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse cotangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function acot($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return atan(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/acoth.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acoth() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic cotangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic cotangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function acoth($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return atanh(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/acsc.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acsc() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse cosecant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse cosecant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function acsc($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return asin(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/acsch.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex acsch() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic cosecant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic cosecant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function acsch($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return asinh(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/argument.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ *
+ * Function code for the complex argument() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the argument of a complex number.
+ * Also known as the theta of the complex number, i.e. the angle in radians
+ *   from the real axis to the representation of the number in polar coordinates.
+ *
+ * This function is a synonym for theta()
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The argument (or theta) value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ *
+ * @see    theta
+ */
+function argument($complex)
+{
+    return theta($complex);
+}

vendor/markbaker/complex/classes/src/functions/asec.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex asec() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse secant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse secant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function asec($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return acos(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/asech.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex asech() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic secant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic secant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function asech($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return acosh(inverse($complex));
+}

vendor/markbaker/complex/classes/src/functions/asin.php

@@ -0,0 +1,37 @@
+<?php
+
+/**
+ *
+ * Function code for the complex asin() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse sine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse sine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function asin($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    $square = multiply($complex, $complex);
+    $invsqrt = new Complex(1.0);
+    $invsqrt = subtract($invsqrt, $square);
+    $invsqrt = sqrt($invsqrt);
+    $adjust = new Complex(
+        $invsqrt->getReal() - $complex->getImaginary(),
+        $invsqrt->getImaginary() + $complex->getReal()
+    );
+    $log = ln($adjust);
+
+    return new Complex(
+        $log->getImaginary(),
+        -1 * $log->getReal()
+    );
+}

vendor/markbaker/complex/classes/src/functions/asinh.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ *
+ * Function code for the complex asinh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic sine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic sine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function asinh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal() && ($complex->getReal() > 1)) {
+        return new Complex(\asinh($complex->getReal()));
+    }
+
+    $asinh = clone $complex;
+    $asinh = $asinh->reverse()
+        ->invertReal();
+    $asinh = asin($asinh);
+    return $asinh->reverse()
+        ->invertImaginary();
+}

vendor/markbaker/complex/classes/src/functions/atan.php

@@ -0,0 +1,45 @@
+<?php
+
+/**
+ *
+ * Function code for the complex atan() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+//include_once 'Math/Complex.php';
+//include_once 'Math/ComplexOp.php';
+
+/**
+ * Returns the inverse tangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse tangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function atan($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\atan($complex->getReal()));
+    }
+
+    $t1Value = new Complex(-1 * $complex->getImaginary(), $complex->getReal());
+    $uValue = new Complex(1, 0);
+
+    $d1Value = clone $uValue;
+    $d1Value = subtract($d1Value, $t1Value);
+    $d2Value = add($t1Value, $uValue);
+    $uResult = $d1Value->divideBy($d2Value);
+    $uResult = ln($uResult);
+
+    return new Complex(
+        (($uResult->getImaginary() == M_PI) ? -M_PI : $uResult->getImaginary()) * -0.5,
+        $uResult->getReal() * 0.5,
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/atanh.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ *
+ * Function code for the complex atanh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse hyperbolic tangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse hyperbolic tangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function atanh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        $real = $complex->getReal();
+        if ($real >= -1.0 && $real <= 1.0) {
+            return new Complex(\atanh($real));
+        } else {
+            return new Complex(\atanh(1 / $real), (($real < 0.0) ? M_PI_2 : -1 * M_PI_2));
+        }
+    }
+
+    $iComplex = clone $complex;
+    $iComplex = $iComplex->invertImaginary()
+        ->reverse();
+    return atan($iComplex)
+        ->invertReal()
+        ->reverse();
+}

vendor/markbaker/complex/classes/src/functions/conjugate.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ *
+ * Function code for the complex conjugate() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the complex conjugate of a complex number
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The conjugate of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function conjugate($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return new Complex(
+        $complex->getReal(),
+        -1 * $complex->getImaginary(),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/cos.php

@@ -0,0 +1,34 @@
+<?php
+
+/**
+ *
+ * Function code for the complex cos() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the cosine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The cosine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function cos($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\cos($complex->getReal()));
+    }
+
+    return conjugate(
+        new Complex(
+            \cos($complex->getReal()) * \cosh($complex->getImaginary()),
+            \sin($complex->getReal()) * \sinh($complex->getImaginary()),
+            $complex->getSuffix()
+        )
+    );
+}

vendor/markbaker/complex/classes/src/functions/cosh.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ *
+ * Function code for the complex cosh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic cosine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic cosine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function cosh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\cosh($complex->getReal()));
+    }
+
+    return new Complex(
+        \cosh($complex->getReal()) * \cos($complex->getImaginary()),
+        \sinh($complex->getReal()) * \sin($complex->getImaginary()),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/cot.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex cot() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the cotangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The cotangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function cot($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return new Complex(INF);
+    }
+
+    return inverse(tan($complex));
+}

vendor/markbaker/complex/classes/src/functions/coth.php

@@ -0,0 +1,24 @@
+<?php
+
+/**
+ *
+ * Function code for the complex coth() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic cotangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic cotangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function coth($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+    return inverse(tanh($complex));
+}

vendor/markbaker/complex/classes/src/functions/csc.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex csc() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the cosecant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The cosecant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function csc($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return inverse(sin($complex));
+}

vendor/markbaker/complex/classes/src/functions/csch.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex csch() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic cosecant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic cosecant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function csch($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        return INF;
+    }
+
+    return inverse(sinh($complex));
+}

vendor/markbaker/complex/classes/src/functions/exp.php

@@ -0,0 +1,34 @@
+<?php
+
+/**
+ *
+ * Function code for the complex exp() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the exponential of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The exponential of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function exp($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if (($complex->getReal() == 0.0) && (\abs($complex->getImaginary()) == M_PI)) {
+        return new Complex(-1.0, 0.0);
+    }
+
+    $rho = \exp($complex->getReal());
+ 
+    return new Complex(
+        $rho * \cos($complex->getImaginary()),
+        $rho * \sin($complex->getImaginary()),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/inverse.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex inverse() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the inverse of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The inverse of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function inverse($complex)
+{
+    $complex = clone Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+        throw new \InvalidArgumentException('Division by zero');
+    }
+
+    return $complex->divideInto(1.0);
+}

vendor/markbaker/complex/classes/src/functions/ln.php

@@ -0,0 +1,33 @@
+<?php
+
+/**
+ *
+ * Function code for the complex ln() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the natural logarithm of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The natural logarithm of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException  If the real and the imaginary parts are both zero
+ */
+function ln($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if (($complex->getReal() == 0.0) && ($complex->getImaginary() == 0.0)) {
+        throw new \InvalidArgumentException();
+    }
+
+    return new Complex(
+        \log(rho($complex)),
+        theta($complex),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/log10.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ *
+ * Function code for the complex log10() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the common logarithm (base 10) of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The common logarithm (base 10) of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException  If the real and the imaginary parts are both zero
+ */
+function log10($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if (($complex->getReal() == 0.0) && ($complex->getImaginary() == 0.0)) {
+        throw new \InvalidArgumentException();
+    } elseif (($complex->getReal() > 0.0) && ($complex->getImaginary() == 0.0)) {
+        return new Complex(\log10($complex->getReal()), 0.0, $complex->getSuffix());
+    }
+
+    return ln($complex)
+        ->multiply(\log10(Complex::EULER));
+}

vendor/markbaker/complex/classes/src/functions/log2.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ *
+ * Function code for the complex log2() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the base-2 logarithm of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The base-2 logarithm of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException  If the real and the imaginary parts are both zero
+ */
+function log2($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if (($complex->getReal() == 0.0) && ($complex->getImaginary() == 0.0)) {
+        throw new \InvalidArgumentException();
+    } elseif (($complex->getReal() > 0.0) && ($complex->getImaginary() == 0.0)) {
+        return new Complex(\log($complex->getReal(), 2), 0.0, $complex->getSuffix());
+    }
+
+    return ln($complex)
+        ->multiply(\log(Complex::EULER, 2));
+}

vendor/markbaker/complex/classes/src/functions/negative.php

@@ -0,0 +1,31 @@
+<?php
+
+/**
+ *
+ * Function code for the complex negative() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the negative of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The negative value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ *
+ * @see    rho
+ *
+ */
+function negative($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return new Complex(
+        -1 * $complex->getReal(),
+        -1 * $complex->getImaginary(),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/pow.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ *
+ * Function code for the complex pow() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns a complex number raised to a power.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @param     float|integer    $power      The power to raise this value to
+ * @return    Complex          The complex argument raised to the real power.
+ * @throws    Exception        If the power argument isn't a valid real
+ */
+function pow($complex, $power)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if (!is_numeric($power)) {
+        throw new Exception('Power argument must be a real number');
+    }
+
+    if ($complex->getImaginary() == 0.0 && $complex->getReal() >= 0.0) {
+        return new Complex(\pow($complex->getReal(), $power));
+    }
+
+    $rValue = \sqrt(($complex->getReal() * $complex->getReal()) + ($complex->getImaginary() * $complex->getImaginary()));
+    $rPower = \pow($rValue, $power);
+    $theta = $complex->argument() * $power;
+    if ($theta == 0) {
+        return new Complex(1);
+    }
+
+    return new Complex($rPower * \cos($theta), $rPower * \sin($theta), $complex->getSuffix());
+}

vendor/markbaker/complex/classes/src/functions/rho.php

@@ -0,0 +1,28 @@
+<?php
+
+/**
+ *
+ * Function code for the complex rho() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the rho of a complex number.
+ * This is the distance/radius from the centrepoint to the representation of the number in polar coordinates.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The rho value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function rho($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return \sqrt(
+        ($complex->getReal() * $complex->getReal()) +
+        ($complex->getImaginary() * $complex->getImaginary())
+    );
+}

vendor/markbaker/complex/classes/src/functions/sec.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ *
+ * Function code for the complex sec() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the secant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The secant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function sec($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return inverse(cos($complex));
+}

vendor/markbaker/complex/classes/src/functions/sech.php

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ *
+ * Function code for the complex sech() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic secant of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic secant of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function sech($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    return inverse(cosh($complex));
+}

vendor/markbaker/complex/classes/src/functions/sin.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ *
+ * Function code for the complex sin() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the sine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The sine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function sin($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\sin($complex->getReal()));
+    }
+
+    return new Complex(
+        \sin($complex->getReal()) * \cosh($complex->getImaginary()),
+        \cos($complex->getReal()) * \sinh($complex->getImaginary()),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/sinh.php

@@ -0,0 +1,32 @@
+<?php
+
+/**
+ *
+ * Function code for the complex sinh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic sine of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic sine of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function sinh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\sinh($complex->getReal()));
+    }
+
+    return new Complex(
+        \sinh($complex->getReal()) * \cos($complex->getImaginary()),
+        \cosh($complex->getReal()) * \sin($complex->getImaginary()),
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/sqrt.php

@@ -0,0 +1,29 @@
+<?php
+
+/**
+ *
+ * Function code for the complex sqrt() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the square root of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The Square root of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function sqrt($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    $theta = theta($complex);
+    $delta1 = \cos($theta / 2);
+    $delta2 = \sin($theta / 2);
+    $rho = \sqrt(rho($complex));
+
+    return new Complex($delta1 * $rho, $delta2 * $rho, $complex->getSuffix());
+}

vendor/markbaker/complex/classes/src/functions/tan.php

@@ -0,0 +1,40 @@
+<?php
+
+/**
+ *
+ * Function code for the complex tan() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the tangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The tangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function tan($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->isReal()) {
+        return new Complex(\tan($complex->getReal()));
+    }
+
+    $real = $complex->getReal();
+    $imaginary = $complex->getImaginary();
+    $divisor = 1 + \pow(\tan($real), 2) * \pow(\tanh($imaginary), 2);
+    if ($divisor == 0.0) {
+        throw new \InvalidArgumentException('Division by zero');
+    }
+
+    return new Complex(
+        \pow(sech($imaginary)->getReal(), 2) * \tan($real) / $divisor,
+        \pow(sec($real)->getReal(), 2) * \tanh($imaginary) / $divisor,
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/tanh.php

@@ -0,0 +1,35 @@
+<?php
+
+/**
+ *
+ * Function code for the complex tanh() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the hyperbolic tangent of a complex number.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    Complex          The hyperbolic tangent of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ * @throws    \InvalidArgumentException    If function would result in a division by zero
+ */
+function tanh($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+    $real = $complex->getReal();
+    $imaginary = $complex->getImaginary();
+    $divisor = \cos($imaginary) * \cos($imaginary) + \sinh($real) * \sinh($real);
+    if ($divisor == 0.0) {
+        throw new \InvalidArgumentException('Division by zero');
+    }
+
+    return new Complex(
+        \sinh($real) * \cosh($real) / $divisor,
+        0.5 * \sin(2 * $imaginary) / $divisor,
+        $complex->getSuffix()
+    );
+}

vendor/markbaker/complex/classes/src/functions/theta.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ *
+ * Function code for the complex theta() function
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Returns the theta of a complex number.
+ *   This is the angle in radians from the real axis to the representation of the number in polar coordinates.
+ *
+ * @param     Complex|mixed    $complex    Complex number or a numeric value.
+ * @return    float            The theta value of the complex argument.
+ * @throws    Exception        If argument isn't a valid real or complex number.
+ */
+function theta($complex)
+{
+    $complex = Complex::validateComplexArgument($complex);
+
+    if ($complex->getReal() == 0.0) {
+        if ($complex->isReal()) {
+            return 0.0;
+        } elseif ($complex->getImaginary() < 0.0) {
+            return M_PI / -2;
+        }
+        return M_PI / 2;
+    } elseif ($complex->getReal() > 0.0) {
+        return \atan($complex->getImaginary() / $complex->getReal());
+    } elseif ($complex->getImaginary() < 0.0) {
+        return -(M_PI - \atan(\abs($complex->getImaginary()) / \abs($complex->getReal())));
+    }
+
+    return M_PI - \atan($complex->getImaginary() / \abs($complex->getReal()));
+}

vendor/markbaker/complex/classes/src/operations/add.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ *
+ * Function code for the complex addition operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Adds two or more complex numbers
+ *
+ * @param     array of string|integer|float|Complex    $complexValues   The numbers to add
+ * @return    Complex
+ */
+function add(...$complexValues)
+{
+    if (count($complexValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $base = array_shift($complexValues);
+    $result = clone Complex::validateComplexArgument($base);
+
+    foreach ($complexValues as $complex) {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($result->isComplex() && $complex->isComplex() &&
+            $result->getSuffix() !== $complex->getSuffix()) {
+            throw new Exception('Suffix Mismatch');
+        }
+
+        $real = $result->getReal() + $complex->getReal();
+        $imaginary = $result->getImaginary() + $complex->getImaginary();
+
+        $result = new Complex(
+            $real,
+            $imaginary,
+            ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
+        );
+    }
+
+    return $result;
+}

vendor/markbaker/complex/classes/src/operations/divideby.php

@@ -0,0 +1,56 @@
+<?php
+
+/**
+ *
+ * Function code for the complex division operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Divides two or more complex numbers
+ *
+ * @param     array of string|integer|float|Complex    $complexValues   The numbers to divide
+ * @return    Complex
+ */
+function divideby(...$complexValues)
+{
+    if (count($complexValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $base = array_shift($complexValues);
+    $result = clone Complex::validateComplexArgument($base);
+
+    foreach ($complexValues as $complex) {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($result->isComplex() && $complex->isComplex() &&
+            $result->getSuffix() !== $complex->getSuffix()) {
+            throw new Exception('Suffix Mismatch');
+        }
+        if ($complex->getReal() == 0.0 && $complex->getImaginary() == 0.0) {
+            throw new \InvalidArgumentException('Division by zero');
+        }
+
+        $delta1 = ($result->getReal() * $complex->getReal()) +
+            ($result->getImaginary() * $complex->getImaginary());
+        $delta2 = ($result->getImaginary() * $complex->getReal()) -
+            ($result->getReal() * $complex->getImaginary());
+        $delta3 = ($complex->getReal() * $complex->getReal()) +
+            ($complex->getImaginary() * $complex->getImaginary());
+
+        $real = $delta1 / $delta3;
+        $imaginary = $delta2 / $delta3;
+
+        $result = new Complex(
+            $real,
+            $imaginary,
+            ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
+        );
+    }
+
+    return $result;
+}

vendor/markbaker/complex/classes/src/operations/divideinto.php

@@ -0,0 +1,56 @@
+<?php
+
+/**
+ *
+ * Function code for the complex division operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Divides two or more complex numbers
+ *
+ * @param     array of string|integer|float|Complex    $complexValues   The numbers to divide
+ * @return    Complex
+ */
+function divideinto(...$complexValues)
+{
+    if (count($complexValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $base = array_shift($complexValues);
+    $result = clone Complex::validateComplexArgument($base);
+
+    foreach ($complexValues as $complex) {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($result->isComplex() && $complex->isComplex() &&
+            $result->getSuffix() !== $complex->getSuffix()) {
+            throw new Exception('Suffix Mismatch');
+        }
+        if ($result->getReal() == 0.0 && $result->getImaginary() == 0.0) {
+            throw new \InvalidArgumentException('Division by zero');
+        }
+
+        $delta1 = ($complex->getReal() * $result->getReal()) +
+            ($complex->getImaginary() * $result->getImaginary());
+        $delta2 = ($complex->getImaginary() * $result->getReal()) -
+            ($complex->getReal() * $result->getImaginary());
+        $delta3 = ($result->getReal() * $result->getReal()) +
+            ($result->getImaginary() * $result->getImaginary());
+
+        $real = $delta1 / $delta3;
+        $imaginary = $delta2 / $delta3;
+
+        $result = new Complex(
+            $real,
+            $imaginary,
+            ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
+        );
+    }
+
+    return $result;
+}

vendor/markbaker/complex/classes/src/operations/multiply.php

@@ -0,0 +1,48 @@
+<?php
+
+/**
+ *
+ * Function code for the complex multiplication operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Multiplies two or more complex numbers
+ *
+ * @param     array of string|integer|float|Complex    $complexValues   The numbers to multiply
+ * @return    Complex
+ */
+function multiply(...$complexValues)
+{
+    if (count($complexValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $base = array_shift($complexValues);
+    $result = clone Complex::validateComplexArgument($base);
+
+    foreach ($complexValues as $complex) {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($result->isComplex() && $complex->isComplex() &&
+            $result->getSuffix() !== $complex->getSuffix()) {
+            throw new Exception('Suffix Mismatch');
+        }
+
+        $real = ($result->getReal() * $complex->getReal()) -
+            ($result->getImaginary() * $complex->getImaginary());
+        $imaginary = ($result->getReal() * $complex->getImaginary()) +
+            ($result->getImaginary() * $complex->getReal());
+
+        $result = new Complex(
+            $real,
+            $imaginary,
+            ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
+        );
+    }
+
+    return $result;
+}

vendor/markbaker/complex/classes/src/operations/subtract.php

@@ -0,0 +1,46 @@
+<?php
+
+/**
+ *
+ * Function code for the complex subtraction operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Complex;
+
+/**
+ * Subtracts two or more complex numbers
+ *
+ * @param     array of string|integer|float|Complex    $complexValues   The numbers to subtract
+ * @return    Complex
+ */
+function subtract(...$complexValues)
+{
+    if (count($complexValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $base = array_shift($complexValues);
+    $result = clone Complex::validateComplexArgument($base);
+
+    foreach ($complexValues as $complex) {
+        $complex = Complex::validateComplexArgument($complex);
+
+        if ($result->isComplex() && $complex->isComplex() &&
+            $result->getSuffix() !== $complex->getSuffix()) {
+            throw new Exception('Suffix Mismatch');
+        }
+
+        $real = $result->getReal() - $complex->getReal();
+        $imaginary = $result->getImaginary() - $complex->getImaginary();
+
+        $result = new Complex(
+            $real,
+            $imaginary,
+            ($imaginary == 0.0) ? null : max($result->getSuffix(), $complex->getSuffix())
+        );
+    }
+
+    return $result;
+}

vendor/markbaker/complex/composer.json

@@ -0,0 +1,91 @@
+{
+    "name": "markbaker/complex",
+    "type": "library",
+    "description": "PHP Class for working with complex numbers",
+    "keywords": ["complex", "mathematics"],
+    "homepage": "https://github.com/MarkBaker/PHPComplex",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Mark Baker",
+            "email": "mark@lange.demon.co.uk"
+        }
+    ],
+    "require": {
+        "php": "^5.6.0|^7.0.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8.35|^5.4.0",
+        "phpdocumentor/phpdocumentor":"2.*",
+        "phpmd/phpmd": "2.*",
+        "sebastian/phpcpd": "2.*",
+        "phploc/phploc": "2.*",
+        "squizlabs/php_codesniffer": "^3.3.0",
+        "phpcompatibility/php-compatibility": "^8.0",
+        "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "Complex\\": "classes/src/"
+        },
+        "files": [
+            "classes/src/functions/abs.php",
+            "classes/src/functions/acos.php",
+            "classes/src/functions/acosh.php",
+            "classes/src/functions/acot.php",
+            "classes/src/functions/acoth.php",
+            "classes/src/functions/acsc.php",
+            "classes/src/functions/acsch.php",
+            "classes/src/functions/argument.php",
+            "classes/src/functions/asec.php",
+            "classes/src/functions/asech.php",
+            "classes/src/functions/asin.php",
+            "classes/src/functions/asinh.php",
+            "classes/src/functions/atan.php",
+            "classes/src/functions/atanh.php",
+            "classes/src/functions/conjugate.php",
+            "classes/src/functions/cos.php",
+            "classes/src/functions/cosh.php",
+            "classes/src/functions/cot.php",
+            "classes/src/functions/coth.php",
+            "classes/src/functions/csc.php",
+            "classes/src/functions/csch.php",
+            "classes/src/functions/exp.php",
+            "classes/src/functions/inverse.php",
+            "classes/src/functions/ln.php",
+            "classes/src/functions/log2.php",
+            "classes/src/functions/log10.php",
+            "classes/src/functions/negative.php",
+            "classes/src/functions/pow.php",
+            "classes/src/functions/rho.php",
+            "classes/src/functions/sec.php",
+            "classes/src/functions/sech.php",
+            "classes/src/functions/sin.php",
+            "classes/src/functions/sinh.php",
+            "classes/src/functions/sqrt.php",
+            "classes/src/functions/tan.php",
+            "classes/src/functions/tanh.php",
+            "classes/src/functions/theta.php",
+            "classes/src/operations/add.php",
+            "classes/src/operations/subtract.php",
+            "classes/src/operations/multiply.php",
+            "classes/src/operations/divideby.php",
+            "classes/src/operations/divideinto.php"
+        ]
+    },
+    "scripts": {
+        "style": [
+            "phpcs --report-width=200 --report-summary  --report-full classes/src/ --standard=PSR2 -n"
+        ],
+        "mess": [
+            "phpmd classes/src/ xml codesize,unusedcode,design,naming -n"
+        ],
+        "lines": [
+            "phploc classes/src/ -n"
+        ],
+        "cpd": [
+            "phpcpd classes/src/ -n"
+        ]
+    },
+    "minimum-stability": "dev"
+}

vendor/markbaker/complex/examples/complexTest.php

@@ -0,0 +1,154 @@
+<?php
+
+use Complex\Complex as Complex;
+
+include('../classes/Bootstrap.php');
+
+echo 'Create', PHP_EOL;
+
+$x = new Complex(123);
+echo $x, PHP_EOL;
+
+$x = new Complex(123, 456);
+echo $x, PHP_EOL;
+
+$x = new Complex(array(123,456,'j'));
+echo $x, PHP_EOL;
+
+$x = new Complex('1.23e-4--2.34e-5i');
+echo $x, PHP_EOL;
+
+
+echo PHP_EOL, 'Add', PHP_EOL;
+
+$x = new Complex(123);
+$x->add(456);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456);
+$x->add(789.012);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->add(new Complex(-987.654, -32.1));
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->add(-987.654);
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->add(new Complex(0, 1));
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->add(new Complex(0, -1));
+echo $x, PHP_EOL;
+
+
+echo PHP_EOL, 'Subtract', PHP_EOL;
+
+$x = new Complex(123);
+$x->subtract(456);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456);
+$x->subtract(789.012);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->subtract(new Complex(-987.654, -32.1));
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->subtract(-987.654);
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->subtract(new Complex(0, 1));
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->subtract(new Complex(0, -1));
+echo $x, PHP_EOL;
+
+
+echo PHP_EOL, 'Multiply', PHP_EOL;
+
+$x = new Complex(123);
+$x->multiply(456);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456);
+$x->multiply(789.012);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->multiply(new Complex(-987.654, -32.1));
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->multiply(-987.654);
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->multiply(new Complex(0, 1));
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->multiply(new Complex(0, -1));
+echo $x, PHP_EOL;
+
+
+echo PHP_EOL, 'Divide By', PHP_EOL;
+
+$x = new Complex(123);
+$x->divideBy(456);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456);
+$x->divideBy(789.012);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->divideBy(new Complex(-987.654, -32.1));
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->divideBy(-987.654);
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->divideBy(new Complex(0, 1));
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->divideBy(new Complex(0, -1));
+echo $x, PHP_EOL;
+
+
+echo PHP_EOL, 'Divide Into', PHP_EOL;
+
+$x = new Complex(123);
+$x->divideInto(456);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456);
+$x->divideInto(789.012);
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->divideInto(new Complex(-987.654, -32.1));
+echo $x, PHP_EOL;
+
+$x = new Complex(123.456, 78.90);
+$x->divideInto(-987.654);
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->divideInto(new Complex(0, 1));
+echo $x, PHP_EOL;
+
+$x = new Complex(-987.654, -32.1);
+$x->divideInto(new Complex(0, -1));
+echo $x, PHP_EOL;

vendor/markbaker/complex/examples/testFunctions.php

@@ -0,0 +1,52 @@
+<?php
+
+namespace Complex;
+
+include('../classes/Bootstrap.php');
+
+echo 'Function Examples', PHP_EOL;
+
+$functions = array(
+    'abs',
+    'acos',
+    'acosh',
+    'acsc',
+    'acsch',
+    'argument',
+    'asec',
+    'asech',
+    'asin',
+    'asinh',
+    'conjugate',
+    'cos',
+    'cosh',
+    'csc',
+    'csch',
+    'exp',
+    'inverse',
+    'ln',
+    'log2',
+    'log10',
+    'rho',
+    'sec',
+    'sech',
+    'sin',
+    'sinh',
+    'sqrt',
+    'theta'
+);
+
+for ($real = -3.5; $real <= 3.5; $real += 0.5) {
+    for ($imaginary = -3.5; $imaginary <= 3.5; $imaginary += 0.5) {
+        foreach ($functions as $function) {
+            $complexFunction = __NAMESPACE__ . '\\' . $function;
+            $complex = new Complex($real, $imaginary);
+            try {
+                echo $function, '(', $complex, ') = ', $complexFunction($complex), PHP_EOL;
+            } catch (\Exception $e) {
+                echo $function, '(', $complex, ') ERROR: ', $e->getMessage(), PHP_EOL;
+            }
+        }
+        echo PHP_EOL;
+    }
+}

vendor/markbaker/complex/examples/testOperations.php

@@ -0,0 +1,34 @@
+<?php
+
+use Complex\Complex as Complex;
+
+include('../classes/Bootstrap.php');
+
+$values = [
+    new Complex(123),
+    new Complex(456, 123),
+    new Complex(0.0, 456),
+];
+
+foreach ($values as $value) {
+    echo $value, PHP_EOL;
+}
+
+echo 'Addition', PHP_EOL;
+
+$result = \Complex\add(...$values);
+echo '=> ', $result, PHP_EOL;
+
+echo PHP_EOL;
+
+echo 'Subtraction', PHP_EOL;
+
+$result = \Complex\subtract(...$values);
+echo '=> ', $result, PHP_EOL;
+
+echo PHP_EOL;
+
+echo 'Multiplication', PHP_EOL;
+
+$result = \Complex\multiply(...$values);
+echo '=> ', $result, PHP_EOL;

vendor/markbaker/complex/license.md

@@ -0,0 +1,25 @@
+The MIT License (MIT)
+=====================
+
+Copyright © `2017` `Mark Baker`
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the “Software”), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

vendor/markbaker/matrix/README.md

@@ -0,0 +1,165 @@
+PHPMatrix
+==========
+
+---
+
+PHP Class for handling Matrices
+
+Master: [![Build Status](https://travis-ci.org/MarkBaker/PHPMatrix.png?branch=master)](http://travis-ci.org/MarkBaker/PHPMatrix)
+
+Develop: [![Build Status](https://travis-ci.org/MarkBaker/PHPMatrix.png?branch=develop)](http://travis-ci.org/MarkBaker/PHPMatrix)
+
+[![Matrix Transform](https://imgs.xkcd.com/comics/matrix_transform.png)](https://xkcd.com/184/)
+
+Matrix Transform
+
+---
+
+This library currently provides the following operations:
+
+ - addition
+ - direct sum
+ - subtraction
+ - multiplication
+ - division (using [A].[B]<sup>-1</sup>)
+    - division by
+    - division into
+
+together with functions for 
+
+ - adjoint
+ - antidiagonal
+ - cofactors
+ - determinant
+ - diagonal
+ - identity
+ - inverse
+ - minors
+ - trace
+ - transpose
+
+
+## TO DO
+
+ - power()
+ - EigenValues
+ - EigenVectors
+ - Decomposition
+
+---
+
+# Usage
+
+To create a new Matrix object, provide an array as the constructor argument
+
+```
+$grid = [
+    [16,  3,  2, 13],
+    [ 5, 10, 11,  8],
+    [ 9,  6,  7, 12],
+    [ 4, 15, 14,  1],
+];
+
+$matrix = new Matrix\Matrix($grid);
+```
+The `Builder` class provides helper methods for creating specific matrices, specifically an identity matrix of a specified size; or a matrix of a specified dimensions, with every cell containing a set value.
+```
+$matrix = new Matrix\Builder::createFilledMatrix(1, 5, 3);
+```
+Will create a matrix of 5 rows and 3 columns, filled with a `1` in every cell; while
+```
+$matrix = new Matrix\Builder::createIdentityMatrix(3);
+```
+will create a 3x3 identity matrix.
+
+
+Matrix objects are immutable: whenever you call a method or pass a grid to a function that returns a matrix value, a new Matrix object will be returned, and the original will remain unchanged. This also allows you to chain multiple methods as you would for a fluent interface (as long as they are methods that will return a Matrix result).
+
+## Performing Mathematical Operations
+
+To perform mathematical operations with Matrices, you can call the appropriate method against a matrix value, passing other values as arguments
+
+```
+$matrix1 = new Matrix([
+    [2, 7, 6],
+    [9, 5, 1],
+    [4, 3, 8],
+]);
+$matrix2 = new Matrix([
+    [1, 2, 3],
+    [4, 5, 6],
+    [7, 8, 9],
+]);
+
+echo $matrix1->multiply($matrix2);
+```
+or pass all values to the appropriate function
+```
+$matrix1 = new Matrix([
+    [2, 7, 6],
+    [9, 5, 1],
+    [4, 3, 8],
+]);
+$matrix2 = new Matrix([
+    [1, 2, 3],
+    [4, 5, 6],
+    [7, 8, 9],
+]);
+
+echo Matrix\multiply($matrix1, $matrix2);
+```
+You can pass in the arguments as Matrix objects, or as arrays.
+
+If you want to perform the same operation against multiple values (e.g. to add three or more matrices), then you can pass multiple arguments to any of the operations.
+
+## Using functions
+
+When calling any of the available functions for a matrix value, you can either call the relevant method for the Matrix object
+```
+$grid = [
+    [16,  3,  2, 13],
+    [ 5, 10, 11,  8],
+    [ 9,  6,  7, 12],
+    [ 4, 15, 14,  1],
+];
+
+$matrix = new Matrix\Matrix($grid);
+
+echo $matrix->trace();
+```
+or you can call the function as you would in procedural code, passing the Matrix object as an argument 
+```
+$grid = [
+    [16,  3,  2, 13],
+    [ 5, 10, 11,  8],
+    [ 9,  6,  7, 12],
+    [ 4, 15, 14,  1],
+];
+
+$matrix = new Matrix\Matrix($grid);
+echo Matrix\trace($matrix);
+```
+When called procedurally using the function, you can pass in the argument as a Matrix object, or as an array.
+```
+$grid = [
+    [16,  3,  2, 13],
+    [ 5, 10, 11,  8],
+    [ 9,  6,  7, 12],
+    [ 4, 15, 14,  1],
+];
+
+echo Matrix\trace($grid);
+```
+As an alternative, it is also possible to call the method directly from the `Functions` class.
+```
+$grid = [
+    [16,  3,  2, 13],
+    [ 5, 10, 11,  8],
+    [ 9,  6,  7, 12],
+    [ 4, 15, 14,  1],
+];
+
+$matrix = new Matrix\Matrix($grid);
+echo Matrix\Functions::trace($matrix);
+```
+Used this way, methods must be called statically, and the argument must be the Matrix object, and cannot be an array.

vendor/markbaker/matrix/buildPhar.php

@@ -0,0 +1,62 @@
+<?php
+
+# required: PHP 5.3+ and zlib extension
+
+// ini option check
+if (ini_get('phar.readonly')) {
+    echo "php.ini: set the 'phar.readonly' option to 0 to enable phar creation\n";
+    exit(1);
+}
+
+// output name
+$pharName = 'Matrix.phar';
+
+// target folder
+$sourceDir = __DIR__ . DIRECTORY_SEPARATOR . 'classes' . DIRECTORY_SEPARATOR . 'src' . DIRECTORY_SEPARATOR;
+
+// default meta information
+$metaData = array(
+    'Author'      => 'Mark Baker <mark@lange.demon.co.uk>',
+    'Description' => 'PHP Class for working with Matrix numbers',
+    'Copyright'   => 'Mark Baker (c) 2013-' . date('Y'),
+    'Timestamp'   => time(),
+    'Version'     => '0.1.0',
+    'Date'        => date('Y-m-d')
+);
+
+// cleanup
+if (file_exists($pharName)) {
+    echo "Removed: {$pharName}\n";
+    unlink($pharName);
+}
+
+echo "Building phar file...\n";
+
+// the phar object
+$phar = new Phar($pharName, null, 'Matrix');
+$phar->buildFromDirectory($sourceDir);
+$phar->setStub(
+<<<'EOT'
+<?php
+    spl_autoload_register(function ($className) {
+        include 'phar://' . $className . '.php';
+    });
+
+    try {
+        Phar::mapPhar();
+    } catch (PharException $e) {
+        error_log($e->getMessage());
+        exit(1);
+    }
+
+    include 'phar://functions/sqrt.php';
+
+    __HALT_COMPILER();
+EOT
+);
+$phar->setMetadata($metaData);
+$phar->compressFiles(Phar::GZ);
+
+echo "Complete.\n";
+
+exit();

vendor/markbaker/matrix/classes/Autoloader.php

@@ -0,0 +1,53 @@
+<?php
+
+namespace Matrix;
+
+/**
+ *
+ * Autoloader for Matrix classes
+ *
+ * @package Matrix
+ * @copyright  Copyright (c) 2014 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT          MIT
+ */
+class Autoloader
+{
+    /**
+     * Register the Autoloader with SPL
+     *
+     */
+    public static function Register()
+    {
+        if (function_exists('__autoload')) {
+            //    Register any existing autoloader function with SPL, so we don't get any clashes
+            spl_autoload_register('__autoload');
+        }
+        //    Register ourselves with SPL
+        return spl_autoload_register(['Matrix\\Autoloader', 'Load']);
+    }
+
+
+    /**
+     * Autoload a class identified by name
+     *
+     * @param    string    $pClassName    Name of the object to load
+     */
+    public static function Load($pClassName)
+    {
+        if ((class_exists($pClassName, false)) || (strpos($pClassName, 'Matrix\\') !== 0)) {
+            // Either already loaded, or not a Matrix class request
+            return false;
+        }
+
+        $pClassFilePath = __DIR__ . DIRECTORY_SEPARATOR .
+                          'src' . DIRECTORY_SEPARATOR .
+                          str_replace(['Matrix\\', '\\'], ['', '/'], $pClassName) .
+                          '.php';
+
+        if ((file_exists($pClassFilePath) === false) || (is_readable($pClassFilePath) === false)) {
+            // Can't load
+            return false;
+        }
+        require($pClassFilePath);
+    }
+}

vendor/markbaker/matrix/classes/Bootstrap.php

@@ -0,0 +1,38 @@
+<?php
+
+include_once __DIR__ . '/Autoloader.php';
+
+\Matrix\Autoloader::Register();
+
+
+abstract class FilesystemRegexFilter extends RecursiveRegexIterator
+{
+    protected $regex;
+    public function __construct(RecursiveIterator $it, $regex)
+    {
+        $this->regex = $regex;
+        parent::__construct($it, $regex);
+    }
+}
+
+class FilenameFilter extends FilesystemRegexFilter
+{
+    // Filter files against the regex
+    public function accept()
+    {
+        return (!$this->isFile() || preg_match($this->regex, $this->getFilename()));
+    }
+}
+
+
+$srcFolder = __DIR__ . DIRECTORY_SEPARATOR . 'src';
+$srcDirectory = new RecursiveDirectoryIterator($srcFolder);
+
+$filteredFileList = new FilenameFilter($srcDirectory, '/(?:php)$/i');
+$filteredFileList = new FilenameFilter($filteredFileList, '/^(?!.*(Matrix|Exception)\.php).*$/i');
+
+foreach (new RecursiveIteratorIterator($filteredFileList) as $file) {
+    if ($file->isFile()) {
+        include_once $file;
+    }
+}

vendor/markbaker/matrix/classes/src/Builder.php

@@ -0,0 +1,69 @@
+<?php
+
+/**
+ *
+ * Class for the creating "special" Matrices
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Matrix Builder class.
+ *
+ * @package Matrix
+ */
+class Builder
+{
+    /**
+     * Create a new matrix of specified dimensions, and filled with a specified value
+     * If the column argument isn't provided, then a square matrix will be created
+     *
+     * @param $value
+     * @param $rows
+     * @param null $columns
+     * @return Matrix
+     * @throws Exception
+     */
+    public static function createFilledMatrix($value, $rows, $columns = null)
+    {
+        if ($columns === null) {
+            $columns = $rows;
+        }
+
+        $rows = Matrix::validateRow($rows);
+        $columns = Matrix::validateColumn($columns);
+
+        return new Matrix(
+            array_fill(
+                0,
+                $rows,
+                array_fill(
+                    0,
+                    $columns,
+                    $value
+                )
+            )
+        );
+    }
+
+    /**
+     * Create a new identity matrix of specified dimensions
+     * This will always be a square matrix, with the number of rows and columns matching the provided dimension
+     *
+     * @param int $dimensions
+     * @return Matrix
+     * @throws Exception
+     */
+    public static function createIdentityMatrix($dimensions)
+    {
+        $grid = static::createFilledMatrix(null, $dimensions)->toArray();
+
+        for ($x = 0; $x < $dimensions; ++$x) {
+            $grid[$x][$x] = 1;
+        }
+
+        return new Matrix($grid);
+    }
+}

vendor/markbaker/matrix/classes/src/Exception.php

@@ -0,0 +1,13 @@
+<?php
+
+/**
+ * Exception.
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+class Exception extends \Exception
+{
+}

vendor/markbaker/matrix/classes/src/Functions.php

@@ -0,0 +1,318 @@
+<?php
+
+namespace Matrix;
+
+class Functions
+{
+    /**
+     * Calculate the adjoint of the matrix
+     *
+     * @param Matrix $matrix The matrix whose adjoint we wish to calculate
+     * @return Matrix
+     **/
+    private static function getAdjoint(Matrix $matrix)
+    {
+        return self::transpose(
+            self::getCofactors($matrix)
+        );
+    }
+
+    /**
+     * Return the adjoint of this matrix
+     * The adjugate, classical adjoint, or adjunct of a square matrix is the transpose of its cofactor matrix.
+     * The adjugate has sometimes been called the "adjoint", but today the "adjoint" of a matrix normally refers
+     *     to its corresponding adjoint operator, which is its conjugate transpose.
+     *
+     * @param Matrix $matrix The matrix whose adjoint we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function adjoint(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Adjoint can only be calculated for a square matrix');
+        }
+
+        return self::getAdjoint($matrix);
+    }
+
+    /**
+     * Calculate the cofactors of the matrix
+     *
+     * @param Matrix $matrix The matrix whose cofactors we wish to calculate
+     * @return Matrix
+     **/
+    private static function getCofactors(Matrix $matrix)
+    {
+        $cofactors = self::getMinors($matrix);
+        $dimensions = $matrix->rows;
+
+        $cof = 1;
+        for ($i = 0; $i < $dimensions; ++$i) {
+            $cofs = $cof;
+            for ($j = 0; $j < $dimensions; ++$j) {
+                $cofactors[$i][$j] *= $cofs;
+                $cofs = -$cofs;
+            }
+            $cof = -$cof;
+        }
+
+        return new Matrix($cofactors);
+    }
+
+    /**
+     * Return the cofactors of this matrix
+     *
+     * @param Matrix $matrix The matrix whose cofactors we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function cofactors(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Cofactors can only be calculated for a square matrix');
+        }
+
+        return self::getCofactors($matrix);
+    }
+
+    private static function getDeterminantSegment(Matrix $matrix, $row, $column)
+    {
+        $tmpMatrix = $matrix->toArray();
+        unset($tmpMatrix[$row]);
+        array_walk(
+            $tmpMatrix,
+            function (&$row) use ($column) {
+                unset($row[$column]);
+            }
+        );
+
+        return self::getDeterminant(new Matrix($tmpMatrix));
+    }
+
+    /**
+     * Calculate the determinant of the matrix
+     *
+     * @param Matrix $matrix The matrix whose determinant we wish to calculate
+     * @return float
+     **/
+    private static function getDeterminant(Matrix $matrix)
+    {
+        $dimensions = $matrix->rows;
+        if ($dimensions == 1) {
+            return $matrix->getValue(1, 1);
+        } elseif ($dimensions == 2) {
+            return $matrix->getValue(1, 1) * $matrix->getValue(2, 2) - $matrix->getValue(1, 2) * $matrix->getValue(2, 1);
+        }
+        
+        $determinant = 0;
+        for ($i = 1; $i <= $dimensions; ++$i) {
+            $det = $matrix->getValue(1, $i) * self::getDeterminantSegment($matrix, 0, $i-1);
+            if (($i % 2) == 0) {
+                $determinant -= $det;
+            } else {
+                $determinant += $det;
+            }
+        }
+
+        return $determinant;
+    }
+
+    /**
+     * Return the determinant of this matrix
+     *
+     * @param Matrix $matrix The matrix whose determinant we wish to calculate
+     * @return float
+     * @throws Exception
+     **/
+    public static function determinant(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Determinant can only be calculated for a square matrix');
+        }
+
+        return self::getDeterminant($matrix);
+    }
+
+    /**
+     * Return the diagonal of this matrix
+     *
+     * @param Matrix $matrix The matrix whose diagonal we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function diagonal(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Diagonal can only be extracted from a square matrix');
+        }
+
+        $dimensions = $matrix->rows;
+        $grid = Builder::createFilledMatrix(0, $dimensions, $dimensions)
+            ->toArray();
+
+        for ($i = 0; $i < $dimensions; ++$i) {
+            $grid[$i][$i] = $matrix->getValue($i + 1, $i + 1);
+        }
+
+        return new Matrix($grid);
+    }
+
+    /**
+     * Return the antidiagonal of this matrix
+     *
+     * @param Matrix $matrix The matrix whose antidiagonal we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function antidiagonal(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Anti-Diagonal can only be extracted from a square matrix');
+        }
+
+        $dimensions = $matrix->rows;
+        $grid = Builder::createFilledMatrix(0, $dimensions, $dimensions)
+            ->toArray();
+
+        for ($i = 0; $i < $dimensions; ++$i) {
+            $grid[$i][$dimensions - $i - 1] = $matrix->getValue($i + 1, $dimensions - $i);
+        }
+
+        return new Matrix($grid);
+    }
+
+    /**
+     * Return the identity matrix
+     * The identity matrix, or sometimes ambiguously called a unit matrix, of size n is the n × n square matrix
+     *   with ones on the main diagonal and zeros elsewhere
+     *
+     * @param Matrix $matrix The matrix whose identity we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function identity(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Identity can only be created for a square matrix');
+        }
+
+        $dimensions = $matrix->rows;
+
+        return Builder::createIdentityMatrix($dimensions);
+    }
+
+    /**
+     * Return the inverse of this matrix
+     *
+     * @param Matrix $matrix The matrix whose inverse we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function inverse(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Inverse can only be calculated for a square matrix');
+        }
+
+        $determinant = self::getDeterminant($matrix);
+        if ($determinant == 0.0) {
+            throw new Exception('Inverse can only be calculated for a matrix with a non-zero determinant');
+        }
+
+        if ($matrix->rows == 1) {
+            return new Matrix([[1 / $matrix->getValue(1, 1)]]);
+        }
+
+        return self::getAdjoint($matrix)
+            ->multiply(1 / $determinant);
+    }
+
+    /**
+     * Calculate the minors of the matrix
+     *
+     * @param Matrix $matrix The matrix whose minors we wish to calculate
+     * @return array[]
+     **/
+    protected static function getMinors(Matrix $matrix)
+    {
+        $minors = $matrix->toArray();
+        $dimensions = $matrix->rows;
+        if ($dimensions == 1) {
+            return $minors;
+        }
+
+        for ($i = 0; $i < $dimensions; ++$i) {
+            for ($j = 0; $j < $dimensions; ++$j) {
+                $minors[$i][$j] = self::getDeterminantSegment($matrix, $i, $j);
+            }
+        }
+
+        return $minors;
+    }
+
+    /**
+     * Return the minors of the matrix
+     * The minor of a matrix A is the determinant of some smaller square matrix, cut down from A by removing one or
+     *     more of its rows or columns.
+     * Minors obtained by removing just one row and one column from square matrices (first minors) are required for
+     *     calculating matrix cofactors, which in turn are useful for computing both the determinant and inverse of
+     *     square matrices.
+     *
+     * @param Matrix $matrix The matrix whose minors we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function minors(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Minors can only be calculated for a square matrix');
+        }
+
+        return new Matrix(self::getMinors($matrix));
+    }
+
+    /**
+     * Return the trace of this matrix
+     * The trace is defined as the sum of the elements on the main diagonal (the diagonal from the upper left to the lower right)
+     *     of the matrix
+     *
+     * @param Matrix $matrix The matrix whose trace we wish to calculate
+     * @return float
+     * @throws Exception
+     **/
+    public static function trace(Matrix $matrix)
+    {
+        if (!$matrix->isSquare()) {
+            throw new Exception('Trace can only be extracted from a square matrix');
+        }
+
+        $dimensions = $matrix->rows;
+        $result = 0;
+        for ($i = 1; $i <= $dimensions; ++$i) {
+            $result += $matrix->getValue($i, $i);
+        }
+
+        return $result;
+    }
+
+    /**
+     * Return the transpose of this matrix
+     *
+     * @param Matrix $matrix The matrix whose transpose we wish to calculate
+     * @return Matrix
+     * @throws Exception
+     **/
+    public static function transpose(Matrix $matrix)
+    {
+        $grid = call_user_func_array(
+            'array_map',
+            array_merge(
+                [null],
+                $matrix->toArray()
+            )
+        );
+
+        return new Matrix($grid);
+    }
+}

vendor/markbaker/matrix/classes/src/Matrix.php

@@ -0,0 +1,403 @@
+<?php
+
+/**
+ *
+ * Class for the management of Matrices
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Matrix object.
+ *
+ * @package Matrix
+ *
+ * @property-read int $rows The number of rows in the matrix
+ * @property-read int $columns The number of columns in the matrix
+ * @method Matrix antidiagonal()
+ * @method Matrix adjoint()
+ * @method Matrix cofactors()
+ * @method float determinant()
+ * @method Matrix diagonal()
+ * @method Matrix identity()
+ * @method Matrix inverse()
+ * @method Matrix pseudoInverse()
+ * @method Matrix minors()
+ * @method float trace()
+ * @method Matrix transpose()
+ * @method Matrix add(...$matrices)
+ * @method Matrix subtract(...$matrices)
+ * @method Matrix multiply(...$matrices)
+ * @method Matrix divideby(...$matrices)
+ * @method Matrix divideinto(...$matrices)
+ */
+class Matrix
+{
+    protected $rows;
+    protected $columns;
+    protected $grid = [];
+
+    /*
+     * Create a new Matrix object from an array of values
+     *
+     * @param array $grid
+     */
+    public function __construct(array $grid)
+    {
+        $this->buildFromArray(array_values($grid));
+    }
+
+    /*
+     * Create a new Matrix object from an array of values
+     *
+     * @param array $grid
+     */
+    protected function buildFromArray(array $grid)
+    {
+        $this->rows = count($grid);
+        $columns = array_reduce(
+            $grid,
+            function ($carry, $value) {
+                return max($carry, is_array($value) ? count($value) : 1);
+            },
+            0
+        );
+        $this->columns = $columns;
+
+        array_walk(
+            $grid,
+            function (&$value) use ($columns) {
+                if (!is_array($value)) {
+                    $value = [$value];
+                }
+                $value = array_pad(array_values($value), $columns, null);
+            }
+        );
+
+        $this->grid = $grid;
+    }
+
+    /**
+     * Validate that a row number is a positive integer
+     *
+     * @param $row
+     * @return int
+     * @throws Exception
+     */
+    public static function validateRow($row)
+    {
+        if ((!is_numeric($row)) || (intval($row) < 1)) {
+            throw new Exception('Invalid Row');
+        }
+
+        return (int) $row;
+    }
+
+    /**
+     * Validate that a column number is a positive integer
+     *
+     * @param $column
+     * @return int
+     * @throws Exception
+     */
+    public static function validateColumn($column)
+    {
+        if ((!is_numeric($column)) || (intval($column) < 1)) {
+            throw new Exception('Invalid Column');
+        }
+
+        return (int) $column;
+    }
+
+    /**
+     * Validate that a row number falls within the set of rows for this matrix
+     *
+     * @param $row
+     * @return int
+     * @throws Exception
+     */
+    protected function validateRowInRange($row)
+    {
+        $row = static::validateRow($row);
+        if ($row > $this->rows) {
+            throw new Exception('Requested Row exceeds matrix size');
+        }
+
+        return $row;
+    }
+
+    /**
+     * Validate that a column number falls within the set of columns for this matrix
+     *
+     * @param $column
+     * @return int
+     * @throws Exception
+     */
+    protected function validateColumnInRange($column)
+    {
+        $column = static::validateColumn($column);
+        if ($column > $this->columns) {
+            throw new Exception('Requested Column exceeds matrix size');
+        }
+
+        return $column;
+    }
+
+    /**
+     * Return a new matrix as a subset of rows from this matrix, starting at row number $row, and $rowCount rows
+     * A $rowCount value of 0 will return all rows of the matrix from $row
+     * A negative $rowCount value will return rows until that many rows from the end of the matrix
+     *
+     * Note that row numbers start from 1, not from 0
+     *
+     * @param $row
+     * @param int $rowCount
+     * @return static
+     * @throws Exception
+     */
+    public function getRows($row, $rowCount = 1)
+    {
+        $row = $this->validateRowInRange($row);
+        if ($rowCount == 0) {
+            $rowCount = $this->rows - $row + 1;
+        }
+
+        return new static(array_slice($this->grid, $row - 1, $rowCount));
+    }
+
+    /**
+     * Return a new matrix as a subset of columns from this matrix, starting at column number $column, and $columnCount columns
+     * A $columnCount value of 0 will return all columns of the matrix from $column
+     * A negative $columnCount value will return columns until that many columns from the end of the matrix
+     *
+     * Note that column numbers start from 1, not from 0
+     *
+     * @param $column
+     * @param int $columnCount
+     * @return static
+     * @throws Exception
+     */
+    public function getColumns($column, $columnCount = 1)
+    {
+        $column = $this->validateColumnInRange($column);
+        if ($columnCount < 1) {
+            $columnCount = $this->columns + $columnCount - $column + 1;
+        }
+
+        $grid = [];
+        for ($i = $column - 1; $i < $column + $columnCount - 1; ++$i) {
+            $grid[] = array_column($this->grid, $i);
+        }
+
+        return (new static($grid))->transpose();
+    }
+
+    /**
+     * Return a new matrix as a subset of rows from this matrix, dropping rows starting at row number $row,
+     *     and $rowCount rows
+     * A negative $rowCount value will drop rows until that many rows from the end of the matrix
+     * A $rowCount value of 0 will remove all rows of the matrix from $row
+     *
+     * Note that row numbers start from 1, not from 0
+     *
+     * @param $row
+     * @param int $rowCount
+     * @return static
+     * @throws Exception
+     */
+    public function dropRows($row, $rowCount = 1)
+    {
+        $this->validateRowInRange($row);
+        if ($rowCount == 0) {
+            $rowCount = $this->rows - $row + 1;
+        }
+
+        $grid = $this->grid;
+        array_splice($grid, $row - 1, $rowCount);
+
+        return new static($grid);
+    }
+
+    /**
+     * Return a new matrix as a subset of columns from this matrix, dropping columns starting at column number $column,
+     *     and $columnCount columns
+     * A negative $columnCount value will drop columns until that many columns from the end of the matrix
+     * A $columnCount value of 0 will remove all columns of the matrix from $column
+     *
+     * Note that column numbers start from 1, not from 0
+     *
+     * @param $column
+     * @param int $columnCount
+     * @return static
+     * @throws Exception
+     */
+    public function dropColumns($column, $columnCount = 1)
+    {
+        $this->validateColumnInRange($column);
+        if ($columnCount < 1) {
+            $columnCount = $this->columns + $columnCount - $column + 1;
+        }
+        
+        $grid = $this->grid;
+        array_walk(
+            $grid,
+            function (&$row) use ($column, $columnCount) {
+                array_splice($row, $column - 1, $columnCount);
+            }
+        );
+
+        return new static($grid);
+    }
+
+    /**
+     * Return a value from this matrix, from the "cell" identified by the row and column numbers
+     * Note that row and column numbers start from 1, not from 0
+     *
+     * @param $row
+     * @param $column
+     * @return static
+     * @throws Exception
+     */
+    public function getValue($row, $column)
+    {
+        $row = $this->validateRowInRange($row);
+        $column = $this->validateColumnInRange($column);
+
+        return $this->grid[$row - 1][$column - 1];
+    }
+
+    /**
+     * Returns a Generator that will yield each row of the matrix in turn as a vector matrix
+     *     or the value of each cell if the matrix is a vector
+     *
+     * @return \Generator|Matrix[]|mixed[]
+     */
+    public function rows()
+    {
+        foreach ($this->grid as $i => $row) {
+            yield $i + 1 => ($this->columns == 1)
+                ? $row[0]
+                : new static([$row]);
+        }
+    }
+
+    /**
+     * Returns a Generator that will yield each column of the matrix in turn as a vector matrix
+     *     or the value of each cell if the matrix is a vector
+     *
+     * @return \Generator|Matrix[]|mixed[]
+     */
+    public function columns()
+    {
+        for ($i = 0; $i < $this->columns; ++$i) {
+            yield $i + 1 => ($this->rows == 1)
+                ? $this->grid[0][$i]
+                : new static(array_column($this->grid, $i));
+        }
+    }
+
+    /**
+     * Identify if the row and column dimensions of this matrix are equal,
+     *     i.e. if it is a "square" matrix
+     *
+     * @return bool
+     */
+    public function isSquare()
+    {
+        return $this->rows == $this->columns;
+    }
+
+    /**
+     * Identify if this matrix is a vector
+     *     i.e. if it comprises only a single row or a single column
+     *
+     * @return bool
+     */
+    public function isVector()
+    {
+        return $this->rows == 1 || $this->columns == 1;
+    }
+
+    /**
+     * Return the matrix as a 2-dimensional array
+     *
+     * @return array
+     */
+    public function toArray()
+    {
+        return $this->grid;
+    }
+
+    protected static $getters = [
+        'rows',
+        'columns',
+    ];
+
+    /**
+     * Access specific properties as read-only (no setters)
+     *
+     * @param     $propertyName
+     * @return    mixed
+     * @throws    Exception
+     */
+    public function __get($propertyName)
+    {
+        $propertyName = strtolower($propertyName);
+
+        // Test for function calls
+        if (in_array($propertyName, self::$getters)) {
+            return $this->$propertyName;
+        }
+
+        throw new Exception('Property does not exist');
+    }
+
+    protected static $functions = [
+        'antidiagonal',
+        'adjoint',
+        'cofactors',
+        'determinant',
+        'diagonal',
+        'identity',
+        'inverse',
+        'minors',
+        'trace',
+        'transpose',
+    ];
+
+    protected static $operations = [
+        'add',
+        'subtract',
+        'multiply',
+        'divideby',
+        'divideinto',
+        'directsum',
+    ];
+
+    /**
+     * Returns the result of the function call or operation
+     *
+     * @param     string $functionName
+     * @param     mixed[] $arguments
+     * @return    Matrix|float
+     * @throws    Exception|\InvalidArgumentException
+     */
+    public function __call($functionName, $arguments)
+    {
+        $functionName = strtolower(str_replace('_', '', $functionName));
+
+        // Test for function calls
+        if (in_array($functionName, self::$functions)) {
+            $functionName = "\\" . __NAMESPACE__ . "\\{$functionName}";
+            return $functionName($this, ...$arguments);
+        }
+        // Test for operation calls
+        if (in_array($functionName, self::$operations)) {
+            $functionName = "\\" . __NAMESPACE__ . "\\{$functionName}";
+            return $functionName($this, ...$arguments);
+        }
+        throw new Exception('Function or Operation does not exist');
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/Addition.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class Addition extends Operator
+{
+    /**
+     * Execute the addition
+     *
+     * @param mixed $value The matrix or numeric value to add to the current base value
+     * @throws Exception If the provided argument is not appropriate for the operation
+     * @return $this The operation object, allowing multiple additions to be chained
+     **/
+    public function execute($value)
+    {
+        if (is_array($value)) {
+            $value = new Matrix($value);
+        }
+
+        if (is_object($value) && ($value instanceof Matrix)) {
+            return $this->addMatrix($value);
+        } elseif (is_numeric($value)) {
+            return $this->addScalar($value);
+        }
+
+        throw new Exception('Invalid argument for addition');
+    }
+
+    /**
+     * Execute the addition for a scalar
+     *
+     * @param mixed $value The numeric value to add to the current base value
+     * @return $this The operation object, allowing multiple additions to be chained
+     **/
+    protected function addScalar($value)
+    {
+        for ($row = 0; $row < $this->rows; ++$row) {
+            for ($column = 0; $column < $this->columns; ++$column) {
+                $this->matrix[$row][$column] += $value;
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Execute the addition for a matrix
+     *
+     * @param Matrix $value The numeric value to add to the current base value
+     * @return $this The operation object, allowing multiple additions to be chained
+     * @throws Exception If the provided argument is not appropriate for the operation
+     **/
+    protected function addMatrix(Matrix $value)
+    {
+        $this->validateMatchingDimensions($value);
+
+        for ($row = 0; $row < $this->rows; ++$row) {
+            for ($column = 0; $column < $this->columns; ++$column) {
+                $this->matrix[$row][$column] += $value->getValue($row + 1, $column + 1);
+            }
+        }
+
+        return $this;
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/DirectSum.php

@@ -0,0 +1,65 @@
+<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class DirectSum extends Operator
+{
+    /**
+     * Execute the addition
+     *
+     * @param mixed $value The matrix or numeric value to add to the current base value
+     * @throws Exception If the provided argument is not appropriate for the operation
+     * @return $this The operation object, allowing multiple additions to be chained
+     **/
+    public function execute($value)
+    {
+        if (is_array($value)) {
+            $value = new Matrix($value);
+        }
+
+        if (is_object($value) && ($value instanceof Matrix)) {
+            return $this->directSumMatrix($value);
+        }
+
+        throw new Exception('Invalid argument for addition');
+    }
+
+    /**
+     * Execute the direct sum for a matrix
+     *
+     * @param Matrix $value The numeric value to concatenate/direct sum with the current base value
+     * @return $this The operation object, allowing multiple additions to be chained
+     * @throws Exception If the provided argument is not appropriate for the operation
+     **/
+    protected function directSumMatrix(Matrix $value)
+    {
+        $originalColumnCount = count($this->matrix[0]);
+        $originalRowCount = count($this->matrix);
+        $additionalColumnCount = $value->columns;
+        $additionalRowCount = $value->rows;
+        $value = $value->toArray();
+
+        for ($row = 0; $row < $this->rows; ++$row) {
+            $this->matrix[$row] = array_merge($this->matrix[$row], array_fill(0, $additionalColumnCount, 0));
+        }
+
+        $this->matrix = array_merge(
+            $this->matrix,
+            array_fill(0, $additionalRowCount, array_fill(0, $originalColumnCount, 0))
+        );
+
+        for ($row = $originalRowCount; $row < $originalRowCount + $additionalRowCount; ++$row) {
+            array_splice(
+                $this->matrix[$row],
+                $originalColumnCount,
+                $additionalColumnCount,
+                $value[$row - $originalRowCount]
+            );
+        }
+
+        return $this;
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/Division.php

@@ -0,0 +1,38 @@
+<?php
+
+namespace Matrix\Operators;
+
+use \Matrix\Matrix;
+use \Matrix\Functions;
+use Matrix\Exception;
+
+class Division extends Multiplication
+{
+    /**
+     * Execute the division
+     *
+     * @param mixed $value The matrix or numeric value to divide the current base value by
+     * @throws Exception If the provided argument is not appropriate for the operation
+     * @return $this The operation object, allowing multiple divisions to be chained
+     **/
+    public function execute($value)
+    {
+        if (is_array($value)) {
+            $value = new Matrix($value);
+        }
+
+        if (is_object($value) && ($value instanceof Matrix)) {
+            try {
+                $value = Functions::inverse($value);
+            } catch (Exception $e) {
+                throw new Exception('Division can only be calculated using a matrix with a non-zero determinant');
+            }
+
+            return $this->multiplyMatrix($value);
+        } elseif (is_numeric($value)) {
+            return $this->multiplyScalar(1 / $value);
+        }
+
+        throw new Exception('Invalid argument for division');
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/Multiplication.php

@@ -0,0 +1,77 @@
+<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use \Matrix\Builder;
+use Matrix\Exception;
+
+class Multiplication extends Operator
+{
+    /**
+     * Execute the multiplication
+     *
+     * @param mixed $value The matrix or numeric value to multiply the current base value by
+     * @throws Exception If the provided argument is not appropriate for the operation
+     * @return $this The operation object, allowing multiple multiplications to be chained
+     **/
+    public function execute($value)
+    {
+        if (is_array($value)) {
+            $value = new Matrix($value);
+        }
+
+        if (is_object($value) && ($value instanceof Matrix)) {
+            return $this->multiplyMatrix($value);
+        } elseif (is_numeric($value)) {
+            return $this->multiplyScalar($value);
+        }
+
+        throw new Exception('Invalid argument for multiplication');
+    }
+
+    /**
+     * Execute the multiplication for a scalar
+     *
+     * @param mixed $value The numeric value to multiply with the current base value
+     * @return $this The operation object, allowing multiple mutiplications to be chained
+     **/
+    protected function multiplyScalar($value)
+    {
+        for ($row = 0; $row < $this->rows; ++$row) {
+            for ($column = 0; $column < $this->columns; ++$column) {
+                $this->matrix[$row][$column] *= $value;
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Execute the multiplication for a matrix
+     *
+     * @param Matrix $value The numeric value to multiply with the current base value
+     * @return $this The operation object, allowing multiple mutiplications to be chained
+     * @throws Exception If the provided argument is not appropriate for the operation
+     **/
+    protected function multiplyMatrix(Matrix $value)
+    {
+        $this->validateReflectingDimensions($value);
+
+        $newRows = $this->rows;
+        $newColumns = $value->columns;
+        $matrix = Builder::createFilledMatrix(0, $newRows, $newColumns)
+            ->toArray();
+        for ($row = 0; $row < $newRows; ++$row) {
+            for ($column = 0; $column < $newColumns; ++$column) {
+                $columnData = $value->getColumns($column + 1)->toArray();
+                foreach ($this->matrix[$row] as $key => $valueData) {
+                    $matrix[$row][$column] += $valueData * $columnData[$key][0];
+                }
+            }
+        }
+        $this->matrix = $matrix;
+
+        return $this;
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/Operator.php

@@ -0,0 +1,78 @@
+<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+abstract class Operator
+{
+    /**
+     * Stored internally as a 2-dimension array of values
+     *
+     * @property mixed[][] $matrix
+     **/
+    protected $matrix;
+
+    /**
+     * Number of rows in the matrix
+     *
+     * @property integer $rows
+     **/
+    protected $rows;
+
+    /**
+     * Number of columns in the matrix
+     *
+     * @property integer $columns
+     **/
+    protected $columns;
+
+    /**
+     * Create an new handler object for the operation
+     *
+     * @param Matrix $matrix The base Matrix object on which the operation will be performed
+     */
+    public function __construct(Matrix $matrix)
+    {
+        $this->rows = $matrix->rows;
+        $this->columns = $matrix->columns;
+        $this->matrix = $matrix->toArray();
+    }
+
+    /**
+     * Compare the dimensions of the matrices being operated on to see if they are valid for addition/subtraction
+     *
+     * @param Matrix $matrix The second Matrix object on which the operation will be performed
+     * @throws Exception
+     */
+    protected function validateMatchingDimensions(Matrix $matrix)
+    {
+        if (($this->rows != $matrix->rows) || ($this->columns != $matrix->columns)) {
+            throw new Exception('Matrices have mismatched dimensions');
+        }
+    }
+
+    /**
+     * Compare the dimensions of the matrices being operated on to see if they are valid for multiplication/division
+     *
+     * @param Matrix $matrix The second Matrix object on which the operation will be performed
+     * @throws Exception
+     */
+    protected function validateReflectingDimensions(Matrix $matrix)
+    {
+        if ($this->columns != $matrix->rows) {
+            throw new Exception('Matrices have mismatched dimensions');
+        }
+    }
+
+    /**
+     * Return the result of the operation
+     *
+     * @return Matrix
+     */
+    public function result()
+    {
+        return new Matrix($this->matrix);
+    }
+}

vendor/markbaker/matrix/classes/src/Operators/Subtraction.php

@@ -0,0 +1,68 @@
+<?php
+
+namespace Matrix\Operators;
+
+use Matrix\Matrix;
+use Matrix\Exception;
+
+class Subtraction extends Operator
+{
+    /**
+     * Execute the subtraction
+     *
+     * @param mixed $value The matrix or numeric value to subtract from the current base value
+     * @throws Exception If the provided argument is not appropriate for the operation
+     * @return $this The operation object, allowing multiple subtractions to be chained
+     **/
+    public function execute($value)
+    {
+        if (is_array($value)) {
+            $value = new Matrix($value);
+        }
+
+        if (is_object($value) && ($value instanceof Matrix)) {
+            return $this->subtractMatrix($value);
+        } elseif (is_numeric($value)) {
+            return $this->subtractScalar($value);
+        }
+
+        throw new Exception('Invalid argument for subtraction');
+    }
+
+    /**
+     * Execute the subtraction for a scalar
+     *
+     * @param mixed $value The numeric value to subtracted from the current base value
+     * @return $this The operation object, allowing multiple additions to be chained
+     **/
+    protected function subtractScalar($value)
+    {
+        for ($row = 0; $row < $this->rows; ++$row) {
+            for ($column = 0; $column < $this->columns; ++$column) {
+                $this->matrix[$row][$column] -= $value;
+            }
+        }
+
+        return $this;
+    }
+
+    /**
+     * Execute the subtraction for a matrix
+     *
+     * @param Matrix $value The numeric value to subtract from the current base value
+     * @return $this The operation object, allowing multiple subtractions to be chained
+     * @throws Exception If the provided argument is not appropriate for the operation
+     **/
+    protected function subtractMatrix(Matrix $value)
+    {
+        $this->validateMatchingDimensions($value);
+
+        for ($row = 0; $row < $this->rows; ++$row) {
+            for ($column = 0; $column < $this->columns; ++$column) {
+                $this->matrix[$row][$column] -= $value->getValue($row + 1, $column + 1);
+            }
+        }
+
+        return $this;
+    }
+}

vendor/markbaker/matrix/classes/src/functions/adjoint.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix adjoint() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the adjoint of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function adjoint($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::adjoint($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/antidiagonal.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix antidiagonal() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the antidiagonal of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function antidiagonal($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::antidiagonal($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/cofactors.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix cofactors() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the cofactors of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function cofactors($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::cofactors($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/determinant.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix determinant() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the determinant of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function determinant($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::determinant($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/diagonal.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix diagonal() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the diagonal of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function diagonal($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::diagonal($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/identity.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix identity() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the identity of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The identity matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function identity($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::identity($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/inverse.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix inverse() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the inverse of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function inverse($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::inverse($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/minors.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix minors() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the minors of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The new matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function minors($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::minors($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/trace.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix trace() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the trace of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    float            The trace of the matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function trace($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::trace($matrix);
+}

vendor/markbaker/matrix/classes/src/functions/transpose.php

@@ -0,0 +1,26 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix transpose() function
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+/**
+ * Returns the transpose of a matrix or an array.
+ *
+ * @param     Matrix|array     $matrix    Matrix or an array to treat as a matrix.
+ * @return    Matrix           The transposed matrix
+ * @throws    Exception        If argument isn't a valid matrix or array.
+ */
+function transpose($matrix)
+{
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    return Functions::transpose($matrix);
+}

vendor/markbaker/matrix/classes/src/operations/add.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix addition operation
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\Addition;
+
+/**
+ * Adds two or more matrices
+ *
+ * @param     mixed[]    $matrixValues   The matrices to add
+ * @return    Matrix
+ * @throws    Exception
+ */
+function add(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new Exception('This operation requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new Addition($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/classes/src/operations/directsum.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix direct sum operation
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\DirectSum;
+
+/**
+ * Adds two or more matrices
+ *
+ * @param     mixed[]    $matrixValues   The matrices to add
+ * @return    Matrix
+ * @throws    Exception
+ */
+function directsum(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new Exception('This operation requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new DirectSum($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/classes/src/operations/divideby.php

@@ -0,0 +1,38 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix division operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPComplex)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\Division;
+
+/**
+ * Divides two or more matrix numbers
+ *
+ * @param     mixed[]    $matrixValues   The matrices to divide
+ * @return    Matrix
+ */
+function divideby(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new Division($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/classes/src/operations/divideinto.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix division operation
+ *
+ * @copyright  Copyright (c) 2013-2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\Division;
+
+/**
+ * Divides two or more matrix numbers
+ *
+ * @param     array of string|integer|float|Matrix    $matrixValues   The numbers to divide
+ * @return    Matrix
+ */
+function divideinto(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new \Exception('This function requires at least 2 arguments');
+    }
+    $matrixValues = array_reverse($matrixValues);
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new Division($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/classes/src/operations/multiply.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix multiplication operation
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\Multiplication;
+
+/**
+ * Multiplies two or more matrices
+ *
+ * @param     mixed[]    $matrixValues   The matrices to multiply
+ * @return    Matrix
+ * @throws    Exception
+ */
+function multiply(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new Exception('This operation requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new Multiplication($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/classes/src/operations/subtract.php

@@ -0,0 +1,39 @@
+<?php
+
+/**
+ *
+ * Function code for the matrix subtraction operation
+ *
+ * @copyright  Copyright (c) 2018 Mark Baker (https://github.com/MarkBaker/PHPMatrix)
+ * @license    https://opensource.org/licenses/MIT    MIT
+ */
+namespace Matrix;
+
+use Matrix\Operators\Subtraction;
+
+/**
+ * Subtracts two or more matrices
+ *
+ * @param     mixed[]    $matrixValues   The matrices to subtract
+ * @return    Matrix
+ * @throws    Exception
+ */
+function subtract(...$matrixValues)
+{
+    if (count($matrixValues) < 2) {
+        throw new Exception('This operation requires at least 2 arguments');
+    }
+
+    $matrix = array_shift($matrixValues);
+    if (!is_object($matrix) || !($matrix instanceof Matrix)) {
+        $matrix = new Matrix($matrix);
+    }
+
+    $result = new Subtraction($matrix);
+
+    foreach ($matrixValues as $matrix) {
+        $result->execute($matrix);
+    }
+
+    return $result->result();
+}

vendor/markbaker/matrix/composer.json

@@ -0,0 +1,68 @@
+{
+    "name": "markbaker/matrix",
+    "type": "library",
+    "description": "PHP Class for working with matrices",
+    "keywords": ["matrix", "vector", "mathematics"],
+    "homepage": "https://github.com/MarkBaker/PHPMatrix",
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Mark Baker",
+            "email": "mark@lange.demon.co.uk"
+        }
+    ],
+    "require": {
+        "php": "^5.6.0|^7.0.0"
+    },
+    "require-dev": {
+        "phpunit/phpunit": "^4.8.35|^5.4.0",
+        "phpdocumentor/phpdocumentor":"2.*",
+        "phpmd/phpmd": "2.*",
+        "sebastian/phpcpd": "2.*",
+        "phploc/phploc": "2.*",
+        "squizlabs/php_codesniffer": "^3.3.0",
+        "phpcompatibility/php-compatibility": "^8.0",
+        "dealerdirect/phpcodesniffer-composer-installer": "^0.4.3"
+    },
+    "autoload": {
+        "psr-4": {
+            "Matrix\\": "classes/src/"
+        },
+        "files": [
+            "classes/src/functions/adjoint.php",
+            "classes/src/functions/antidiagonal.php",
+            "classes/src/functions/cofactors.php",
+            "classes/src/functions/determinant.php",
+            "classes/src/functions/diagonal.php",
+            "classes/src/functions/identity.php",
+            "classes/src/functions/inverse.php",
+            "classes/src/functions/minors.php",
+            "classes/src/functions/trace.php",
+            "classes/src/functions/transpose.php",
+            "classes/src/operations/add.php",
+            "classes/src/operations/directsum.php",
+            "classes/src/operations/subtract.php",
+            "classes/src/operations/multiply.php",
+            "classes/src/operations/divideby.php",
+            "classes/src/operations/divideinto.php"
+        ]
+    },
+    "scripts": {
+        "style": [
+            "phpcs --report-width=200 --report-summary  --report-full classes/src/ --standard=PSR2 -n"
+        ],
+        "test": [
+            "phpunit"
+        ],
+        "mess": [
+            "phpmd classes/src/ xml codesize,unusedcode,design,naming -n"
+        ],
+        "lines": [
+            "phploc classes/src/ -n"
+        ],
+        "cpd": [
+            "phpcpd classes/src/ -n"
+        ]
+    },
+    "minimum-stability": "dev"
+}

vendor/markbaker/matrix/examples/test.php

@@ -0,0 +1,19 @@
+<?php
+
+include __DIR__ . '/../classes/Bootstrap.php';
+
+$grid1 = [
+    [1, 3, 2],
+    [2, 3, 1],
+];
+
+$grid2 = [
+    [1, 6],
+    [0, 1],
+];
+
+$matrix = new Matrix\Matrix($grid1);
+
+$new = $matrix->directsum(new Matrix\Matrix($grid2));
+
+var_dump($new);

vendor/markbaker/matrix/license.md

@@ -0,0 +1,25 @@
+The MIT License (MIT)
+=====================
+
+Copyright © `2018` `Mark Baker`
+
+Permission is hereby granted, free of charge, to any person
+obtaining a copy of this software and associated documentation
+files (the “Software”), to deal in the Software without
+restriction, including without limitation the rights to use,
+copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the
+Software is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.

vendor/phpoffice/phpspreadsheet/.gitattributes

@@ -0,0 +1,3 @@
+/tests export-ignore
+README.md export-ignore
+*.min.js binary

vendor/phpoffice/phpspreadsheet/.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,31 @@
+This is:
+
+```
+- [ ] a bug report
+- [ ] a feature request
+- [ ] **not** a usage question (ask them on https://stackoverflow.com/questions/tagged/phpspreadsheet or https://gitter.im/PHPOffice/PhpSpreadsheet)
+```
+
+### What is the expected behavior?
+
+
+### What is the current behavior?
+
+
+### What are the steps to reproduce?
+
+Please provide a [Minimal, Complete, and Verifiable example](https://stackoverflow.com/help/mcve) of code that exhibits the issue without relying on an external Excel file or a web server:
+
+```php
+<?php
+
+require __DIR__ . '/vendor/autoload.php';
+
+// Create new Spreadsheet object
+$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet();
+
+// add code that show the issue here...
+```
+
+
+### Which versions of PhpSpreadsheet and PHP are affected?

vendor/phpoffice/phpspreadsheet/.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,16 @@
+This is:
+
+```
+- [ ] a bugfix
+- [ ] a new feature
+```
+
+Checklist:
+
+- [ ] Changes are covered by unit tests
+- [ ] Code style is respected
+- [ ] Commit message explains **why** the change is made (see https://github.com/erlang/otp/wiki/Writing-good-commit-messages)
+- [ ] CHANGELOG.md contains a short summary of the change
+- [ ] Documentation is updated as necessary
+
+### Why this change is needed?

vendor/phpoffice/phpspreadsheet/.github/stale.yml

@@ -0,0 +1,22 @@
+# Number of days of inactivity before an issue becomes stale
+daysUntilStale: 60
+# Number of days of inactivity before a stale issue is closed
+daysUntilClose: 7
+# Issues with these labels will never be considered stale
+exemptLabels:
+  - pinned
+  - security
+# Label to use when marking an issue as stale
+staleLabel: stale
+# Comment to post when marking an issue as stale. Set to `false` to disable
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs.
+
+  If this is still an issue for you, please try to help by debugging it
+  further and sharing your results.
+
+  Thank you for your contributions.
+
+# Comment to post when closing a stale issue. Set to `false` to disable
+closeComment: false

vendor/phpoffice/phpspreadsheet/.github/support.yml

@@ -0,0 +1,15 @@
+# Label used to mark issues as support requests
+supportLabel: question
+# Comment to post on issues marked as support requests. Add a link
+# to a support page, or set to `false` to disable
+supportComment: >
+  This looks like a support question. Please ask your support questions on
+  [StackOverflow](https://stackoverflow.com/questions/tagged/phpspreadsheet),
+  or [Gitter](https://gitter.im/PHPOffice/PhpSpreadsheet).
+
+  Thank you for your contributions.
+
+# Whether to close issues marked as support requests
+close: true
+# Whether to lock issues marked as support requests
+lock: false

vendor/phpoffice/phpspreadsheet/.gitignore

@@ -0,0 +1,10 @@
+/tests/codeCoverage
+/analysis
+/vendor/
+/phpunit.xml
+
+## IDE support
+*.buildpath
+*.project
+/.settings
+/.idea

vendor/phpoffice/phpspreadsheet/.php_cs.dist

@@ -0,0 +1,183 @@
+<?php
+
+$finder = PhpCsFixer\Finder::create()
+    ->exclude(['vendor', 'tests/data/Calculation'])
+    ->in('samples')
+    ->in('src')
+    ->in('tests/PhpSpreadsheetTests')
+    ;
+
+return PhpCsFixer\Config::create()
+    ->setRiskyAllowed(true)
+    ->setFinder($finder)
+    ->setCacheFile(sys_get_temp_dir() . '/php-cs-fixer' . preg_replace('~\W~', '-', __DIR__))
+    ->setRules([
+        'align_multiline_comment' => true,
+        'array_syntax' => ['syntax' => 'short'],
+        'backtick_to_shell_exec' => true,
+        'binary_operator_spaces' => true,
+        'blank_line_after_namespace' => true,
+        'blank_line_after_opening_tag' => true,
+        'blank_line_before_statement' => true,
+        'braces' => true,
+        'cast_spaces' => true,
+        'class_attributes_separation' => ['elements' => ['method', 'property']], // const are often grouped with other related const
+        'class_definition' => true,
+        'class_keyword_remove' => false, // ::class keyword gives us beter support in IDE
+        'combine_consecutive_issets' => true,
+        'combine_consecutive_unsets' => true,
+        'compact_nullable_typehint' => true,
+        'concat_space' => ['spacing' => 'one'],
+        'declare_equal_normalize' => true,
+        'declare_strict_types' => false, // Too early to adopt strict types
+        'dir_constant' => true,
+        'doctrine_annotation_array_assignment' => true,
+        'doctrine_annotation_braces' => true,
+        'doctrine_annotation_indentation' => true,
+        'doctrine_annotation_spaces' => true,
+        'elseif' => true,
+        'encoding' => true,
+        'ereg_to_preg' => true,
+        'escape_implicit_backslashes' => true,
+        'explicit_indirect_variable' => false, // I feel it makes the code actually harder to read
+        'explicit_string_variable' => false, // I feel it makes the code actually harder to read
+        'final_internal_class' => true,
+        'full_opening_tag' => true,
+        'function_declaration' => true,
+        'function_to_constant' => true,
+        'function_typehint_space' => true,
+        'general_phpdoc_annotation_remove' => false, // No use for that
+        'hash_to_slash_comment' => true,
+        'header_comment' => false, // We don't use common header in all our files
+        'heredoc_to_nowdoc' => false, // Not sure about this one
+        'include' => true,
+        'increment_style' => true,
+        'indentation_type' => true,
+        'is_null' => ['use_yoda_style' => false],
+        'linebreak_after_opening_tag' => true,
+        'line_ending' => true,
+        'list_syntax' => ['syntax' => 'long'], // Stay compatiblew with PHP 5.6
+        'lowercase_cast' => true,
+        'lowercase_constants' => true,
+        'lowercase_keywords' => true,
+        'magic_constant_casing' => true,
+        'mb_str_functions' => false, // No, too dangerous to change that
+        'method_argument_space' => true,
+        'method_chaining_indentation' => true,
+        'method_separation' => true,
+        'modernize_types_casting' => true,
+        'multiline_comment_opening_closing' => true,
+        'native_function_casing' => true,
+        'native_function_invocation' => false, // This is risky and seems to be micro-optimization that make code uglier so not worth it, at least for now
+        'new_with_braces' => true,
+        'no_alias_functions' => true,
+        'no_blank_lines_after_class_opening' => true,
+        'no_blank_lines_after_phpdoc' => true,
+        'no_blank_lines_before_namespace' => false, // we want 1 blank line before namespace
+        'no_break_comment' => true,
+        'no_closing_tag' => true,
+        'no_empty_comment' => true,
+        'no_empty_phpdoc' => true,
+        'no_empty_statement' => true,
+        'no_extra_blank_lines' => true,
+        'no_homoglyph_names' => true,
+        'no_leading_import_slash' => true,
+        'no_leading_namespace_whitespace' => true,
+        'no_mixed_echo_print' => true,
+        'no_multiline_whitespace_around_double_arrow' => true,
+        'no_multiline_whitespace_before_semicolons' => true,
+        'non_printable_character' => true,
+        'no_null_property_initialization' => true,
+        'no_php4_constructor' => true,
+        'normalize_index_brace' => true,
+        'no_short_bool_cast' => true,
+        'no_short_echo_tag' => true,
+        'no_singleline_whitespace_before_semicolons' => true,
+        'no_spaces_after_function_name' => true,
+        'no_spaces_around_offset' => true,
+        'no_spaces_inside_parenthesis' => true,
+        'no_superfluous_elseif' => false, // Might be risky on a huge code base
+        'not_operator_with_space' => false, // No we prefer to keep '!' without spaces
+        'not_operator_with_successor_space' => false, // idem
+        'no_trailing_comma_in_list_call' => true,
+        'no_trailing_comma_in_singleline_array' => true,
+        'no_trailing_whitespace_in_comment' => true,
+        'no_trailing_whitespace' => true,
+        'no_unneeded_control_parentheses' => true,
+        'no_unneeded_curly_braces' => true,
+        'no_unneeded_final_method' => true,
+        'no_unreachable_default_argument_value' => true,
+        'no_unused_imports' => true,
+        'no_useless_else' => true,
+        'no_useless_return' => true,
+        'no_whitespace_before_comma_in_array' => true,
+        'no_whitespace_in_blank_line' => true,
+        'object_operator_without_whitespace' => true,
+        'ordered_class_elements' => false, // We prefer to keep some freedom
+        'ordered_imports' => true,
+        'phpdoc_add_missing_param_annotation' => true,
+        'phpdoc_align' => false, // Waste of time
+        'phpdoc_annotation_without_dot' => true,
+        'phpdoc_indent' => true,
+        'phpdoc_inline_tag' => true,
+        'phpdoc_no_access' => true,
+        'phpdoc_no_alias_tag' => true,
+        'phpdoc_no_empty_return' => true,
+        'phpdoc_no_package' => true,
+        'phpdoc_no_useless_inheritdoc' => true,
+        'phpdoc_order' => true,
+        'phpdoc_return_self_reference' => true,
+        'phpdoc_scalar' => true,
+        'phpdoc_separation' => true,
+        'phpdoc_single_line_var_spacing' => true,
+        'phpdoc_summary' => true,
+        'phpdoc_to_comment' => true,
+        'phpdoc_trim' => true,
+        'phpdoc_types_order' => true,
+        'phpdoc_types' => true,
+        'phpdoc_var_without_name' => true,
+        'php_unit_construct' => true,
+        'php_unit_dedicate_assert' => true,
+        'php_unit_expectation' => true,
+        'php_unit_fqcn_annotation' => true,
+        'php_unit_mock' => true,
+        'php_unit_namespaced' => true,
+        'php_unit_no_expectation_annotation' => true,
+        'php_unit_strict' => false, // We sometime actually need assertEquals
+        'php_unit_test_annotation' => true,
+        'php_unit_test_class_requires_covers' => false, // We don't care as much as we should about coverage
+        'pow_to_exponentiation' => false,
+        'protected_to_private' => true,
+        'psr0' => true,
+        'psr4' => true,
+        'random_api_migration' => false, // This breaks our unit tests
+        'return_type_declaration' => true,
+        'self_accessor' => true,
+        'semicolon_after_instruction' => false, // Buggy in `samples/index.php`
+        'short_scalar_cast' => true,
+        'silenced_deprecation_error' => true,
+        'simplified_null_return' => false, // While technically correct we prefer to be explicit when returning null
+        'single_blank_line_at_eof' => true,
+        'single_blank_line_before_namespace' => true,
+        'single_class_element_per_statement' => true,
+        'single_import_per_statement' => true,
+        'single_line_after_imports' => true,
+        'single_line_comment_style' => true,
+        'single_quote' => true,
+        'space_after_semicolon' => true,
+        'standardize_not_equals' => true,
+        'static_lambda' => false, // Risky if we can't guarantee nobody use `bindTo()`
+        'strict_comparison' => false, // No, too dangerous to change that
+        'strict_param' => false, // No, too dangerous to change that
+        'switch_case_semicolon_to_colon' => true,
+        'switch_case_space' => true,
+        'ternary_operator_spaces' => true,
+        'ternary_to_null_coalescing' => false, // Cannot use that with PHP 5.6
+        'trailing_comma_in_multiline_array' => true,
+        'trim_array_spaces' => true,
+        'unary_operator_spaces' => true,
+        'visibility_required' => true,
+        'void_return' => false, // Cannot use that with PHP 5.6
+        'whitespace_after_comma_in_array' => true,
+        'yoda_style' => false,
+    ]);

vendor/phpoffice/phpspreadsheet/.sami.php

@@ -0,0 +1,24 @@
+<?php
+
+use Sami\RemoteRepository\GitHubRemoteRepository;
+use Sami\Sami;
+use Sami\Version\GitVersionCollection;
+use Symfony\Component\Finder\Finder;
+
+$iterator = Finder::create()
+    ->files()
+    ->name('*.php')
+    ->in($dir = __DIR__ . '/src');
+$versions = GitVersionCollection::create($dir)
+    ->addFromTags(function ($version) {
+        return preg_match('~^\d+\.\d+\.\d+$~', $version);
+    })
+    ->add('master');
+
+return new Sami($iterator, [
+    'title' => 'PhpSpreadsheet',
+    'versions' => $versions,
+    'build_dir' => __DIR__ . '/build/%version%',
+    'cache_dir' => __DIR__ . '/cache/%version%',
+    'remote_repository' => new GitHubRemoteRepository('PHPOffice/PhpSpreadsheet', dirname($dir)),
+]);

vendor/phpoffice/phpspreadsheet/.scrutinizer.yml

@@ -0,0 +1,27 @@
+checks:
+    php: true
+
+coding_style:
+    php:
+        spaces:
+            before_parentheses:
+                closure_definition: true
+            around_operators:
+                concatenation: true
+
+build:
+    nodes:
+        analysis:
+            tests:
+                override:
+                    - php-scrutinizer-run
+
+tools:
+    external_code_coverage:
+        timeout: 3600
+
+build_failure_conditions:
+    - 'elements.rating(<= C).new.exists'                        # No new classes/methods with a rating of C or worse allowed
+    - 'issues.severity(>= MAJOR).new.exists'                    # New issues of major or higher severity
+    - 'project.metric_change("scrutinizer.test_coverage", < 0)' # Code Coverage decreased from previous inspection
+    - 'patches.label("Unused Use Statements").new.exists'       # No new unused imports patches allowed

vendor/phpoffice/phpspreadsheet/.travis.yml

@@ -0,0 +1,64 @@
+language: php
+dist: trusty
+
+php:
+  - 5.6
+  - 7.0
+  - 7.1
+  - 7.2
+  - 7.3
+
+matrix:
+  fast_finish: true
+  allow_failures:
+    - php: 5.6
+
+cache:
+  directories:
+    - cache
+    - vendor
+    - $HOME/.composer/cache
+
+before_script:
+  # Deactivate xdebug
+  - if [ -z "$KEEP_XDEBUG" ]; then rm -rfv /home/travis/.phpenv/versions/$(phpenv version-name)/etc/conf.d/xdebug.ini ; fi
+  - composer install --ignore-platform-reqs
+
+script:
+  - ./vendor/bin/phpunit
+
+jobs:
+  include:
+
+    - stage: Code style
+      php: 7.2
+      script:
+        - ./vendor/bin/php-cs-fixer fix --diff --verbose --dry-run
+        - ./vendor/bin/phpcs --report-width=200 samples/ src/ tests/ --ignore=samples/Header.php --standard=PSR2 -n
+
+    - stage: Coverage
+      php: 7.2
+      env: KEEP_XDEBUG=1
+      script:
+        - travis_wait 40 ./vendor/bin/phpunit --debug --coverage-clover coverage-clover.xml
+      after_script:
+        - wget https://scrutinizer-ci.com/ocular.phar
+        - php ocular.phar code-coverage:upload --format=php-clover tests/coverage-clover.xml
+
+    - stage: API documentation
+      php: 7.2
+      before_script:
+      - curl -O https://get.sensiolabs.org/sami.phar
+      script:
+      - git fetch origin master:master
+      - git fetch origin --tags
+      - php sami.phar update .sami.php
+      - echo '<html><head><meta http-equiv="Refresh" content="0; url=master/"></head><body><p>If you are not automatically redirected, please go to <a href="master/">the latest stable API documentation</a>.</p></body></html>' > build/index.html
+      deploy:
+        provider: pages
+        skip-cleanup: true
+        local-dir: build
+        github-token: $GITHUB_TOKEN
+        on:
+          all_branches: true
+          condition: $TRAVIS_BRANCH =~ ^master$

vendor/phpoffice/phpspreadsheet/CHANGELOG.PHPExcel.md

@@ -0,0 +1,1593 @@
+# Changelog for PHPExcel
+
+This is the historic changelog of the project when it was still called PHPExcel.
+It exists only for historical purposes and versions mentioned here should not be
+confused with PhpSpreadsheet versions.
+
+## [1.8.1] - 2015-04-30
+
+### Bugfixes
+
+- Fix for Writing an Open Document cell with non-numeric formula - @goncons [#397](https://github.com/PHPOffice/PHPExcel/issues/397)
+- Avoid potential divide by zero in basedrawing - @sarciszewski [#329](https://github.com/PHPOffice/PHPExcel/issues/329)
+- XML External Entity (XXE) Processing, different behaviour between simplexml_load_string() and simplexml_load_file(). - @ymaerschalck [#405](https://github.com/PHPOffice/PHPExcel/issues/405)
+- Fix to ensure that current cell is maintained when executing formula calculations - @MarkBaker
+- Keep/set the value on Reader _loadSheetsOnly as NULL, courtesy of Restless-ET - @MarkBaker [#350](https://github.com/PHPOffice/PHPExcel/issues/350)
+- Loading an Excel 2007 spreadsheet throws an "Autofilter must be set on a range of cells" exception - @MarkBaker [CodePlex #18105](https://phpexcel.codeplex.com/workitem/18105)
+- Fix to autoloader registration for backward compatibility with PHP 5.2.0 not accepting the prepend flag - @MarkBaker [#388](https://github.com/PHPOffice/PHPExcel/issues/388)
+- DOM loadHTMLFile() failing with options flags when using PHP < 5.4.0 - @MarkBaker [#384](https://github.com/PHPOffice/PHPExcel/issues/384)
+- Fix for percentage operator in formulae for BIFF Writer - @MarkBaker
+- Fix to getStyle() call for cell object - @MarkBaker
+- Discard Autofilters in Excel2007 Reader when filter range isn't a valid range - @MarkBaker
+- Fix invalid NA return in VLOOKUP - @frozenstupidity [#423](https://github.com/PHPOffice/PHPExcel/issues/423)
+- "No Impact" conditional formatting fix for NumberFormat - @wiseloren [CodePlex #21454](https://phpexcel.codeplex.com/workitem/21454)
+- Bug in Excel2003XML reader, parsing merged cells - @bobwitlox [#467](https://github.com/PHPOffice/PHPExcel/issues/467)
+- Fix for CEIL() and FLOOR() when number argument is zero - @MarkBaker [#302](https://github.com/PHPOffice/PHPExcel/issues/302)
+
+### General
+
+- Remove cells cleanly when calling RemoveRow() or RemoveColumn() - @MarkBaker
+- Small performance improvement for autosize columns - @MarkBaker
+- Change the getter/setter for zeroHeight to camel case - @frost-nzcr4 [#379](https://github.com/PHPOffice/PHPExcel/issues/379)
+- DefaultValueBinder is too much aggressive when converting string to numeric - @MarkBaker [#394](https://github.com/PHPOffice/PHPExcel/issues/394)
+- Default precalculate formulas to false for writers - @MarkBaker
+- Set default Cyclic Reference behaviour to 1 to eliminate exception when using a single cyclic iteration in formulae - @MarkBaker
+
+### Features
+
+- Some Excel writer libraries erroneously use Codepage 21010 for UTF-16LE - @MarkBaker [#396](https://github.com/PHPOffice/PHPExcel/issues/396)
+- Methods to manage most of the existing options for Chart Axis, Major Grid-lines and Minor Grid-lines - @WiktrzGE [#404](https://github.com/PHPOffice/PHPExcel/issues/404)
+- ODS read/write comments in the cell - @frost-nzcr4 [#403](https://github.com/PHPOffice/PHPExcel/issues/403)
+- Additional Mac CJK codepage definitions - @CQD [#389](https://github.com/PHPOffice/PHPExcel/issues/389)
+- Update Worksheet.php getStyleByColumnAndRow() to allow a range of cells rather than just a single cell - @bolovincev [#269](https://github.com/PHPOffice/PHPExcel/issues/269)
+- New methods added for testing cell status within merge groups - @MarkBaker
+- Handling merge cells in HTML Reader - @cifren/MBaker [#205](https://github.com/PHPOffice/PHPExcel/issues/205)
+- Helper to convert basic HTML markup to a Rich Text object - @MarkBaker
+- Improved Iterators - @MarkBaker
+    - New Column Iterator
+    - Support for row and column ranges
+    - Improved handling for next/prev
+
+### Security
+
+- XML filescan in XML-based Readers to prevent XML Entity Expansion (XEE) - @MarkBaker
+    - (see http://projects.webappsec.org/w/page/13247002/XML%20Entity%20Expansion for an explanation of XEE injection) attacks
+    - Reference CVE-2015-3542 - Identification of problem courtesy of Dawid Golunski (Pentest Ltd.)
+
+## [1.8.0] - 2014-03-02
+
+### Bugfixes
+
+- Undefined variable: fileHandle in CSV Reader - @MarkBaker [CodePlex #19830](https://phpexcel.codeplex.com/workitem/19830)
+- Out of memory in style/supervisor.php - @MarkBaker [CodePlex #19968](https://phpexcel.codeplex.com/workitem/19968)
+- Style error with merged cells in PDF Writer - @MarkBaker
+- Problem with cloning worksheets - @MarkBaker
+- Bug fix reading Open Office files - @tavoarcila [#259](https://github.com/PHPOffice/PHPExcel/issues/259)
+- Serious bug in absolute cell reference used in shared formula - @MarkBaker [CodePlex #20397](https://phpexcel.codeplex.com/workitem/20397)
+    - Would also have affected insert/delete column/row- CHOOSE() returns "#VALUE!" if the 1st entry is chosen - @RomanSyroeshko [#267](https://github.com/PHPOffice/PHPExcel/issues/267)
+- When duplicating styles, styles shifted by one column to the right - @Gemorroj [#268](https://github.com/PHPOffice/PHPExcel/issues/268)
+    - Fix also applied to duplicating conditional styles- Fix for formulae that reference a sheet whose name begins with a digit: - @IndrekHaav [#212](https://github.com/PHPOffice/PHPExcel/issues/212)
+    - these were erroneously identified as numeric values, causing the parser to throw an undefined variable error.- Fixed undefined variable error due to $styleArray being used before it's initialised - @IndrekHaav [CodePlex #16208](https://phpexcel.codeplex.com/workitem/16208)
+- ISTEXT() return wrong result if referencing an empty but formatted cell - @PowerKiKi [#273](https://github.com/PHPOffice/PHPExcel/issues/273)
+- Binary comparison of strings are case insensitive - @PowerKiKi [#270](https://github.com/PHPOffice/PHPExcel/issues/270), [#31](https://github.com/PHPOffice/PHPExcel/issues/31)
+- Insert New Row/Column Before is not correctly updating formula references - @MarkBaker [#275](https://github.com/PHPOffice/PHPExcel/issues/275)
+- Passing an array of cells to _generateRow() in the HTML/PDF Writer causes caching problems with last cell in the range - @MarkBaker [#257](https://github.com/PHPOffice/PHPExcel/issues/257)
+- Fix to empty worksheet garbage collection when using cell caching - @MarkBaker [#193](https://github.com/PHPOffice/PHPExcel/issues/193)
+- Excel2007 does not correctly mark rows as hidden - @Jazzo [#248](https://github.com/PHPOffice/PHPExcel/issues/248)
+- Fixed typo in Chart/Layout set/getYMode() - @Roy Shahbazian [#299](https://github.com/PHPOffice/PHPExcel/issues/299)
+- Fatal error: Call to a member function cellExists() line: 3327 in calculation.php if referenced worksheet doesn't exist - @EliuFlorez [#279](https://github.com/PHPOffice/PHPExcel/issues/279)
+- AdvancedValueBinder "Division by zero"-error - @MarkBaker [#290](https://github.com/PHPOffice/PHPExcel/issues/290)
+- Adding Sheet to Workbook Bug - @MarkBaker [CodePlex #20604](https://phpexcel.codeplex.com/workitem/20604)
+- Calculation engine incorrectly evaluates empty cells as #VALUE - @MarkBaker [CodePlex #20703](https://phpexcel.codeplex.com/workitem/20703)
+- Formula references to cell on another sheet in ODS files - @MarkBaker [CodePlex #20760](https://phpexcel.codeplex.com/workitem/20760)
+
+### Features
+
+- LibreOffice created XLSX files results in an empty file. - @MarkBaker [#321](https://github.com/PHPOffice/PHPExcel/issues/321), [#158](https://github.com/PHPOffice/PHPExcel/issues/158), [CodePlex #17824](https://phpexcel.codeplex.com/workitem/17824)
+- Implementation of the Excel HLOOKUP() function - @amerov
+- Added "Quote Prefix" to style settings (Excel2007 Reader and Writer only) - @MarkBaker
+- Added Horizontal FILL alignment for Excel5 and Excel2007 Readers/Writers, and Horizontal DISTRIBUTED alignment for Excel2007 Reader/Writer - @MarkBaker
+- Add support for reading protected (RC4 encrypted) .xls files - @trvrnrth [#261](https://github.com/PHPOffice/PHPExcel/issues/261)
+
+### General
+
+- Adding support for macros, Ribbon in Excel 2007 - @LWol [#252](https://github.com/PHPOffice/PHPExcel/issues/252)
+- Remove array_shift in ReferenceHelper::insertNewBefore improves column or row delete speed - @cdhutch [CodePlex #20055](https://phpexcel.codeplex.com/workitem/20055)
+- Improve stock chart handling and rendering, with help from Swashata Ghosh - @MarkBaker
+- Fix to calculation properties for Excel2007 so that the opening application will only recalculate on load if it's actually required - @MarkBaker
+- Modified Excel2007 Writer to default preCalculateFormulas to false - @MarkBaker
+    - Note that autosize columns will still recalculate affected formulae internally- Functionality to getHighestRow() for a specified column, and getHighestColumn() for a specified row - @dresenhista [#242](https://github.com/PHPOffice/PHPExcel/issues/242)
+- Modify PHPExcel_Reader_Excel2007 to use zipClass from PHPExcel_Settings::getZipClass() - @adamriyadi [#247](https://github.com/PHPOffice/PHPExcel/issues/247)
+    - This allows the use of PCLZip when reading for people that don't have access to ZipArchive
+### Security
+
+- Convert properties to string in OOCalc reader - @infojunkie [#276](https://github.com/PHPOffice/PHPExcel/issues/276)
+- Disable libxml external entity loading by default. - @maartenba [#322](https://github.com/PHPOffice/PHPExcel/issues/322)
+    - This is to prevent XML External Entity Processing (XXE) injection attacks (see https://websec.io/2012/08/27/Preventing-XEE-in-PHP.html for an explanation of XXE injection).
+    - Reference CVE-2014-2054
+
+## [1.7.9] - 2013-06-02
+
+### Features
+
+- Include charts option for HTML Writer - @MarkBaker
+- Added composer file - @MarkBaker
+- cache_in_memory_gzip "eats" last worksheet line, cache_in_memory doesn't - @MarkBaker [CodePlex #18844](https://phpexcel.codeplex.com/workitem/18844)
+- echo statements in HTML.php - @MarkBaker [#104](https://github.com/PHPOffice/PHPExcel/issues/104)
+
+### Bugfixes
+
+- Added getStyle() method to Cell object - @MarkBaker
+- Error in PHPEXCEL/Calculation.php script on line 2976 (stack pop check) - @Asker [CodePlex #18777](https://phpexcel.codeplex.com/workitem/18777)
+- CSV files without a file extension being identified as HTML - @MarkBaker [CodePlex #18794](https://phpexcel.codeplex.com/workitem/18794)
+- Wrong check for maximum number of rows in Excel5 Writer - @AndreKR [#66](https://github.com/PHPOffice/PHPExcel/issues/66)
+- Cache directory for DiscISAM cache storage cannot be set - @MarkBaker [#67](https://github.com/PHPOffice/PHPExcel/issues/67)
+- Fix to Excel2007 Reader for hyperlinks with an anchor fragment (following a #), otherwise they were treated as sheet references - @MarkBaker [CodePlex #17976](https://phpexcel.codeplex.com/workitem/17976)
+- getSheetNames() fails on numeric (floating point style) names with trailing zeroes - @MarkBaker [CodePlex #18963](https://phpexcel.codeplex.com/workitem/18963)
+- Modify cell's getCalculatedValue() method to return the content of RichText objects rather than the RichText object itself - @MarkBaker
+- Fixed formula/formatting bug when removing rows - @techhead [#70](https://github.com/PHPOffice/PHPExcel/issues/70)
+- Fix to cellExists for non-existent namedRanges - @alexgann [#63](https://github.com/PHPOffice/PHPExcel/issues/63)
+- Sheet View in Excel5 Writer - @Progi1984 [#22](https://github.com/PHPOffice/PHPExcel/issues/22)
+- PHPExcel_Worksheet::getCellCollection() may not return last cached cell - @amironov [#82](https://github.com/PHPOffice/PHPExcel/issues/82)
+- Rich Text containing UTF-8 characters creating unreadable content with Excel5 Writer - @teso [CodePlex #18551](https://phpexcel.codeplex.com/workitem/18551)
+- Work item GH-8/CP11704 : Conditional formatting in Excel 5 Writer - @Progi1984
+- canRead() Error for GoogleDocs ODS files: in ODS files from Google Docs there is no mimetype file - @MarkBaker [#113](https://github.com/PHPOffice/PHPExcel/issues/113)
+- "Sheet index is out of bounds." Exception - @MarkBaker [#80](https://github.com/PHPOffice/PHPExcel/issues/80)
+- Fixed number format fatal error - @ccorliss [#105](https://github.com/PHPOffice/PHPExcel/issues/105)
+- Add DROP TABLE in destructor for SQLite and SQLite3 cache controllers - @MarkBaker
+- Fix merged-cell borders on HTML/PDF output - @alexgann [#154](https://github.com/PHPOffice/PHPExcel/issues/154)
+- Fix: Hyperlinks break when removing rows - @Shanto [#161](https://github.com/PHPOffice/PHPExcel/issues/161)
+- Fix Extra Table Row From Images and Charts - @neclimdul [#166](https://github.com/PHPOffice/PHPExcel/issues/166)
+
+### General
+
+- Single cell print area - @MarkBaker [#130](https://github.com/PHPOffice/PHPExcel/issues/130)
+- Improved AdvancedValueBinder for currency - @kea [#69](https://github.com/PHPOffice/PHPExcel/issues/69)
+- Fix for environments where there is no access to /tmp but to upload_tmp_dir - @MarkBaker
+    - Provided an option to set the sys_get_temp_dir() call to use the upload_tmp_dir; though by default the standard temp directory will still be used- Search style by identity in PHPExcel_Worksheet::duplicateStyle() - @amironov  [#84](https://github.com/PHPOffice/PHPExcel/issues/84)
+- Fill SheetView IO in Excel5 - @karak [#85](https://github.com/PHPOffice/PHPExcel/issues/85)
+- Memory and Speed improvements in PHPExcel_Reader_Excel5 - @cfhay [CodePlex #18958](https://phpexcel.codeplex.com/workitem/18958)
+- Modify listWorksheetNames() and listWorksheetInfo to use XMLReader with streamed XML rather than SimpleXML - @MarkBaker [#78](https://github.com/PHPOffice/PHPExcel/issues/78)
+- Restructuring of PHPExcel Exceptions - @dbonsch
+- Refactor Calculation Engine from singleton to a Multiton - @MarkBaker
+    - Ensures that calculation cache is maintained independently for different workbooks
+
+## [1.7.8] - 2012-10-12
+
+### Features
+
+- Phar builder script to add phar file as a distribution option - @kkamkou
+- Refactor PDF Writer to allow use with a choice of PDF Rendering library - @MarkBaker
+    - rather than restricting to tcPDF
+    - Current options are tcPDF, mPDF, DomPDF
+    - tcPDF Library has now been removed from the deployment bundle- Initial version of HTML Reader - @MarkBaker
+- Implement support for AutoFilter in PHPExcel_Writer_Excel5 - @Progi1984
+- Modified ERF and ERFC Engineering functions to accept Excel 2010's modified acceptance of negative arguments - @MarkBaker
+- Support SheetView `view` attribute (Excel2007) - @k1LoW
+- Excel compatibility option added for writing CSV files - @MarkBaker
+    - While Excel 2010 can read CSV files with a simple UTF-8 BOM, Excel2007 and earlier require UTF-16LE encoded tab-separated files.
+    - The new setExcelCompatibility(TRUE) option for the CSV Writer will generate files with this formatting for easy import into Excel2007 and below.- Language implementations for Turkish (tr) - @MarkBaker
+- Added fraction tests to advanced value binder - @MarkBaker
+
+### General
+
+- Allow call to font setUnderline() for underline format to specify a simple boolean for UNDERLINE_NONE or UNDERLINE_SINGLE - @MarkBaker
+- Add Currency detection to the Advanced Value Binder - @alexgann
+- setCellValueExplicitByColumnAndRow() do not return PHPExcel_Worksheet - @MarkBaker [CodePlex #18404](https://phpexcel.codeplex.com/workitem/18404)
+- Reader factory doesn't read anymore XLTX and XLT files - @MarkBaker [CodePlex #18324](https://phpexcel.codeplex.com/workitem/18324)
+- Magic __toString() method added to Cell object to return raw data value as a string - @MarkBaker
+- Add cell indent to html rendering - @alexgann
+
+### Bugfixes
+
+- ZeroHeight for rows in sheet format - @Raghav1981
+- OOCalc cells containing <text:span> inside the <text:p> tag - @cyberconte
+- Fix to listWorksheetInfo() method for OOCalc Reader - @schir1964
+- Support for "e" (epoch) date format mask - @MarkBaker
+    - Rendered as a 4-digit CE year in non-Excel outputs- Background color cell is always black when editing cell - @MarkBaker
+- Allow "no impact" to formats on Conditional Formatting - @MarkBaker
+- OOCalc Reader fix for NULL cells - @wackonline
+- Fix to excel2007 Chart Writer when a $plotSeriesValues is empty - @seltzlab
+- Various fixes to Chart handling - @MarkBaker
+- Error loading xlsx file with column breaks - @MarkBaker [CodePlex #18370](https://phpexcel.codeplex.com/workitem/18370)
+- OOCalc Reader now handles percentage and currency data types - @MarkBaker
+- mb_stripos empty delimiter - @MarkBaker
+- getNestingLevel() Error on Excel5 Read - @takaakik
+- Fix to Excel5 Reader when cell annotations are defined before their referenced text objects - @MarkBaker
+- OOCalc Reader modified to process number-rows-repeated - @MarkBaker
+- Chart Title compatibility on Excel 2007 - @MarkBaker [CodePlex #18377](https://phpexcel.codeplex.com/workitem/18377)
+- Chart Refresh returning cell reference rather than values - @MarkBaker [CodePlex #18146](https://phpexcel.codeplex.com/workitem/18146)
+- Autoshape being identified in twoCellAnchor when includeCharts is TRUE triggering load error - @MarkBaker [CodePlex #18145](https://phpexcel.codeplex.com/workitem/18145)
+- v-type texts for series labels now recognised and parsed correctly - @MarkBaker [CodePlex #18325](https://phpexcel.codeplex.com/workitem/18325)
+- load file failed if the file has no extensionType - @wolf5x [CodePlex #18492](https://phpexcel.codeplex.com/workitem/18492)
+- Pattern fill colours in Excel2007 Style Writer - @dverspui
+- Excel2007 Writer order of font style elements to conform with Excel2003 using compatibility pack - @MarkBaker
+- Problems with $_activeSheetIndex when decreased below 0. - @MarkBaker [CodePlex #18425](https://phpexcel.codeplex.com/workitem/18425)
+- PHPExcel_CachedObjectStorage_SQLite3::cacheMethodIsAvailable() uses class_exists - autoloader throws error - @MarkBaker [CodePlex #18597](https://phpexcel.codeplex.com/workitem/18597)
+- Cannot access private property PHPExcel_CachedObjectStorageFactory::$_cacheStorageMethod - @MarkBaker [CodePlex #18598](https://phpexcel.codeplex.com/workitem/18598)
+- Data titles for charts - @MarkBaker [CodePlex #18397](https://phpexcel.codeplex.com/workitem/18397)
+    - PHPExcel_Chart_Layout now has methods for getting/setting switches for displaying/hiding chart data labels- Discard single cell merge ranges when reading (stupid that Excel allows them in the first place) - @MarkBaker
+- Discard hidden autoFilter named ranges - @MarkBaker
+
+## [1.7.7] - 2012-05-19
+
+### Bugfixes
+
+- Support for Rich-Text in PHPExcel_Writer_Excel5 - @Progi1984 [CodePlex #8916](https://phpexcel.codeplex.com/workitem/8916)
+- Change iterators to implement Iterator rather than extend CachingIterator, as a fix for PHP 5.4. changes in SPL - @MarkBaker
+- Invalid cell coordinate in Autofilter for Excel2007 Writer - @MarkBaker [CodePlex #15459](https://phpexcel.codeplex.com/workitem/15459)
+- PCLZip library issue - @MarkBaker [CodePlex #15518](https://phpexcel.codeplex.com/workitem/15518)
+- Excel2007 Reader canRead function bug - @MarkBaker [CodePlex #15537](https://phpexcel.codeplex.com/workitem/15537)
+- Support for Excel functions whose return can be used as either a value or as a cell reference depending on its context within a formula - @MarkBaker
+- ini_set() call in Calculation class destructor - @gilles06 [CodePlex #15707](https://phpexcel.codeplex.com/workitem/15707)
+- RangeToArray strange array keys - @MarkBaker [CodePlex #15786](https://phpexcel.codeplex.com/workitem/15786)
+- INDIRECT() function doesn't work with named ranges - @MarkBaker [CodePlex #15762](https://phpexcel.codeplex.com/workitem/15762)
+- Locale-specific fix to text functions when passing a boolean argument instead of a string - @MarkBaker
+- reader/CSV fails on this file - @MarkBaker [CodePlex #16246](https://phpexcel.codeplex.com/workitem/16246)
+    - auto_detect_line_endings now set in CSV reader- $arguments improperly used in CachedObjectStorage/PHPTemp.php - @MarkBaker [CodePlex #16212](https://phpexcel.codeplex.com/workitem/16212)
+- Bug In Cache System (cell reference when throwing caching errors) - @MarkBaker [CodePlex #16643](https://phpexcel.codeplex.com/workitem/16643)
+- PHP Invalid index notice on writing excel file when active sheet has been deleted - @MarkBaker [CodePlex #16895](https://phpexcel.codeplex.com/workitem/16895)
+- External links in Excel2010 files cause Fatal error - @MarkBaker [CodePlex #16956](https://phpexcel.codeplex.com/workitem/16956)
+- Previous calculation engine error conditions trigger cyclic reference errors - @MarkBaker [CodePlex #16960](https://phpexcel.codeplex.com/workitem/16960)
+- PHPExcel_Style::applyFromArray() returns null rather than style object in advanced mode - @mkopinsky [CodePlex #16266](https://phpexcel.codeplex.com/workitem/16266)
+- Cell::getFormattedValue returns RichText object instead of string - @fauvel [CodePlex #16958](https://phpexcel.codeplex.com/workitem/16958)
+- Indexed colors do not refer to Excel's indexed colors? - @MarkBaker [CodePlex #17166](https://phpexcel.codeplex.com/workitem/17166)
+- Indexed colors should be consistent with Excel and start from 1 (current index starts at 0) - @MarkBaker [CodePlex #17199](https://phpexcel.codeplex.com/workitem/17199)
+- Named Range definition in .xls when sheet reeference is quote wrapped - @MarkBaker [CodePlex #17262](https://phpexcel.codeplex.com/workitem/17262)
+- duplicateStyle() method doesn't duplicate conditional formats - @MarkBaker [CodePlex #17403](https://phpexcel.codeplex.com/workitem/17403)
+    - Added an equivalent duplicateConditionalStyle() method for duplicating conditional styles- =sumproduct(A,B) <> =sumproduct(B,A) in xlsx - @bnr [CodePlex #17501](https://phpexcel.codeplex.com/workitem/17501)
+
+### Features
+
+- OOCalc cells contain same data bug? - @cyberconte [CodePlex #17471](https://phpexcel.codeplex.com/workitem/17471)
+- listWorksheetInfo() method added to Readers... courtesy of Christopher Mullins - @schir1964
+- Options for cell caching using Igbinary and SQLite/SQlite3. - @MarkBaker
+- Additional row iterator options: allow a start row to be defined in the constructor; seek(), and prev() methods added. - @MarkBaker
+- Implement document properties in Excel5 writer - @Progi1984 [CodePlex #9759](https://phpexcel.codeplex.com/workitem/9759)
+
+### General
+
+- Implement chart functionality (EXPERIMENTAL) - @MarkBaker [CodePlex #16](https://phpexcel.codeplex.com/workitem/16)
+    - Initial definition of chart objects.
+    - Reading Chart definitions through the Excel2007 Reader
+    - Facility to render charts to images using the 3rd-party jpgraph library
+    - Writing Charts using the Excel2007 Writer- Fix to build to ensure that Examples are included with the documentation - @MarkBaker
+- Reduce cell caching overhead using dirty flag to ensure that cells are only rewritten to the cache if they have actually been changed - @MarkBaker
+- Improved memory usage in CSV Writer - @MarkBaker
+- Improved speed and memory usage in Excel5 Writer - @MarkBaker
+- Experimental - @MarkBaker
+    - Added getHighestDataColumn(), getHighestDataRow(), getHighestRowAndColumn() and calculateWorksheetDataDimension() methods for the worksheet that return the highest row and column that have cell records- Support for Rich-Text in PHPExcel_Writer_Excel5 - @Progi1984 [CodePlex #8916](https://phpexcel.codeplex.com/workitem/8916)
+- Two easy to fix Issues concerning PHPExcel_Token_Stack (l10n/UC) - @MarkBaker [CodePlex #15405](https://phpexcel.codeplex.com/workitem/15405)
+- Locale file paths not fit for windows - @MarkBaker [CodePlex #15461](https://phpexcel.codeplex.com/workitem/15461)
+- Add file directory as a cache option for cache_to_discISAM - @MarkBaker [CodePlex #16643](https://phpexcel.codeplex.com/workitem/16643)
+- Datatype.php & constant TYPE_NULL - @MarkBaker [CodePlex #16923](https://phpexcel.codeplex.com/workitem/16923)
+- Ensure use of system temp directory for all temporary work files, unless explicitly specified - @MarkBaker
+- [Patch] faster stringFromColumnIndex() - @char101 [CodePlex #16359](https://phpexcel.codeplex.com/workitem/16359)
+- Fix for projects that still use old autoloaders - @whit1206 [CodePlex #16028](https://phpexcel.codeplex.com/workitem/16028)
+- Unknown codepage: 10007 - @atz [CodePlex #17024](https://phpexcel.codeplex.com/workitem/17024)
+    - Additional Mac codepages
+
+## [1.7.6] - 2011-02-27
+
+### Features
+
+- Provide option to use PCLZip as an alternative to ZipArchive. - @MarkBaker
+    - This allows the writing of Excel2007 files, even without ZipArchive enabled (it does require zlib), or when php_zip is one of the buggy PHP 5.2.6 or 5.2.8 versions
+    - It can be enabled using PHPExcel_Settings::setZipClass(PHPExcel_Settings::PCLZIP);
+    - Note that it is not yet implemented as an alternative to ZipArchive for those Readers that are extracting from zips- Added listWorksheetNames() method to Readers that support multiple worksheets in a workbook, allowing a user to extract a list of all the worksheet names from a file without parsing/loading the whole file. - @MarkBaker [CodePlex #14979](https://phpexcel.codeplex.com/workitem/14979)
+- Speed boost and memory reduction in the Worksheet toArray() method. - @MarkBaker
+- Added new rangeToArray() and namedRangeToArray() methods to the PHPExcel_Worksheet object. - @MarkBaker
+    - Functionally, these are identical to the toArray() method, except that they take an additional first parameter of a Range (e.g. 'B2:C3') or a Named Range name.
+    - Modified the toArray() method so that it actually uses rangeToArray().- Added support for cell comments in the OOCalc, Gnumeric and Excel2003XML Readers, and in the Excel5 Reader - @MarkBaker
+- Improved toFormattedString() handling for Currency and Accounting formats to render currency symbols - @MarkBaker
+
+### Bugfixes
+
+- Implement more Excel calculation functions - @MarkBaker
+    - Implemented the DAVERAGE(), DCOUNT(), DCOUNTA(), DGET(), DMAX(), DMIN(), DPRODUCT(), DSTDEV(), DSTDEVP(), DSUM(), DVAR() and DVARP() Database functions- Simple =IF() formula disappears - @MarkBaker [CodePlex #14888](https://phpexcel.codeplex.com/workitem/14888)
+- PHP Warning: preg_match(): Compilation failed: PCRE does not support \\L, \\l, \\N, \\P, \\p, \\U, \\u, or \\X - @MarkBaker [CodePlex #14898](https://phpexcel.codeplex.com/workitem/14898)
+- VLOOKUP choking on parameters in PHPExcel.1.7.5/PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #14901](https://phpexcel.codeplex.com/workitem/14901)
+- PHPExcel_Cell::isInRange() incorrect results - offset by one column - @MarkBaker [CodePlex #14973](https://phpexcel.codeplex.com/workitem/14973)
+- Treat CodePage of 0 as CP1251 (for .xls files written by applications that don't set the CodePage correctly, such as Apple Numbers) - @MarkBaker
+- Need method for removing autoFilter - @MarkBaker [CodePlex #11583](https://phpexcel.codeplex.com/workitem/11583)
+- coordinateFromString throws exception for rows greater than 99,999 - @MarkBaker [CodePlex #15029](https://phpexcel.codeplex.com/workitem/15029)
+- PHPExcel Excel2007 Reader colour problems with solidfill - @MarkBaker [CodePlex #14999](https://phpexcel.codeplex.com/workitem/14999)
+- Formatting get lost and edit a template XLSX file - @MarkBaker [CodePlex #13215](https://phpexcel.codeplex.com/workitem/13215)
+- Excel 2007 Reader /writer lost fontcolor - @MarkBaker [CodePlex #14029](https://phpexcel.codeplex.com/workitem/14029)
+- file that makes cells go black - @MarkBaker [CodePlex #13374](https://phpexcel.codeplex.com/workitem/13374)
+- Minor patchfix for Excel2003XML Reader when XML is defined with a charset attribute - @MarkBaker
+- PHPExcel_Worksheet->toArray() index problem - @MarkBaker [CodePlex #15089](https://phpexcel.codeplex.com/workitem/15089)
+- Merge cells 'un-merge' when using an existing spreadsheet - @MarkBaker [CodePlex #15094](https://phpexcel.codeplex.com/workitem/15094)
+- Worksheet fromArray() only working with 2-D arrays - @MarkBaker [CodePlex #15129](https://phpexcel.codeplex.com/workitem/15129)
+- rangeToarray function modified for non-existent cells - @xkeshav [CodePlex #15172](https://phpexcel.codeplex.com/workitem/15172)
+- Images not getting copyied with the ->clone function - @MarkBaker [CodePlex #14980](https://phpexcel.codeplex.com/workitem/14980)
+- AdvancedValueBinder.php: String sometimes becomes a date when it shouldn't - @MarkBaker [CodePlex #11576](https://phpexcel.codeplex.com/workitem/11576)
+- Fix Excel5 Writer so that it only writes column dimensions for columns that are actually used rather than the full range (A to IV) - @MarkBaker
+- FreezePane causing damaged or modified error - @MarkBaker [CodePlex #15198](https://phpexcel.codeplex.com/workitem/15198)
+    - The freezePaneByColumnAndRow() method row argument should default to 1 rather than 0.
+    - Default row argument for all __ByColumnAndRow() methods should be 1- Column reference rather than cell reference in Print Area definition - @MarkBaker [CodePlex #15121](https://phpexcel.codeplex.com/workitem/15121)
+    - Fix Excel2007 Writer to handle print areas that are defined as row or column ranges rather than just as cell ranges- Reduced false positives from isDateTimeFormatCode() method by suppressing testing within quoted strings - @MarkBaker
+- Caching and tmp partition exhaustion - @MarkBaker [CodePlex #15312](https://phpexcel.codeplex.com/workitem/15312)
+- Writing to Variable No Longer Works. $_tmp_dir Missing in PHPExcel\PHPExcel\Shared\OLE\PPS\Root.php - @MarkBaker [CodePlex #15308](https://phpexcel.codeplex.com/workitem/15308)
+- Named ranges with dot don't get parsed properly - @MarkBaker [CodePlex #15379](https://phpexcel.codeplex.com/workitem/15379)
+- insertNewRowBefore fails to consistently update references - @MarkBaker [CodePlex #15096](https://phpexcel.codeplex.com/workitem/15096)
+- "i" is not a valid character for Excel date format masks (in isDateTimeFormatCode() method) - @MarkBaker
+- PHPExcel_ReferenceHelper::insertNewBefore() is missing an 'Update worksheet: comments' section - @MKunert [CodePlex #15421](https://phpexcel.codeplex.com/workitem/15421)
+
+### General
+
+- Full column/row references in named ranges not supported by updateCellReference() - @MarkBaker [CodePlex #15409](https://phpexcel.codeplex.com/workitem/15409)
+- Improved performance (speed), for building the Shared Strings table in the Excel2007 Writer. - @MarkBaker
+- Improved performance (speed), for PHP to Excel date conversions - @MarkBaker
+- Enhanced SheetViews element structures in the Excel2007 Writer for frozen panes. - @MarkBaker
+- Removed Serialized Reader/Writer as these no longer work. - @MarkBaker
+
+## [1.7.5] - 2010-12-10
+
+### Features
+
+- Implement Gnumeric File Format - @MarkBaker [CodePlex #8769](https://phpexcel.codeplex.com/workitem/8769)
+    - Initial work on Gnumeric Reader (Worksheet Data, Document Properties and basic Formatting)- Support for Extended Workbook Properties in Excel2007, Excel5 and OOCalc Readers; support for User-defined Workbook Properties in Excel2007 and OOCalc Readers - @MarkBaker
+- Support for Extended and User-defined Workbook Properties in Excel2007 Writer - @MarkBaker
+- Provided a setGenerateSheetNavigationBlock(false); option to suppress generation of the sheet navigation block when writing multiple worksheets to HTML - @MarkBaker
+- Advanced Value Binder now recognises TRUE/FALSE strings (locale-specific) and converts to boolean - @MarkBaker
+- PHPExcel_Worksheet->toArray() is returning truncated values - @MarkBaker [CodePlex #14301](https://phpexcel.codeplex.com/workitem/14301)
+- Configure PDF Writer margins based on Excel Worksheet Margin Settings value - @MarkBaker
+- Added Contiguous flag for the CSV Reader, when working with Read Filters - @MarkBaker
+- Added getFormattedValue() method for cell object - @MarkBaker
+- Added strictNullComparison argument to the worksheet fromArray() method - @MarkBaker
+
+### Bugfixes
+
+- Fix to toFormattedString() method in PHPExcel_Style_NumberFormat to handle fractions with a # code for the integer part - @MarkBaker
+- NA() doesn't propagate in matrix calc - quick fix in JAMA/Matrix.php - @MarkBaker [CodePlex #14143](https://phpexcel.codeplex.com/workitem/14143)
+- Excel5 : Formula : String constant containing double quotation mark - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Excel5 : Formula : Percent - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Excel5 : Formula : Error constant - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Excel5 : Formula : Concatenation operator - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Worksheet clone broken for CachedObjectStorage_Memory - @MarkBaker [CodePlex #14146](https://phpexcel.codeplex.com/workitem/14146)
+- PHPExcel_Reader_Excel2007 fails when gradient fill without type is present in a file - @MarkBaker [CodePlex #12998](https://phpexcel.codeplex.com/workitem/12998)
+- @ format for numeric strings in XLSX to CSV conversion - @MarkBaker [CodePlex #14176](https://phpexcel.codeplex.com/workitem/14176)
+- Advanced Value Binder Not Working? - @MarkBaker [CodePlex #14223](https://phpexcel.codeplex.com/workitem/14223)
+- unassigned object variable in PHPExcel->removeCellXfByIndex - @MarkBaker [CodePlex #14226](https://phpexcel.codeplex.com/workitem/14226)
+- problem with getting cell values from another worksheet... (if cell doesn't exist) - @MarkBaker [CodePlex #14236](https://phpexcel.codeplex.com/workitem/14236)
+- Setting cell values to one char strings & Trouble reading one character string (thanks gorfou) - @MarkBaker
+- Worksheet title exception when duplicate worksheet is being renamed but exceeds the 31 character limit - @MarkBaker [CodePlex #14256](https://phpexcel.codeplex.com/workitem/14256)
+- Named range with sheet name that contains the $ throws exception when getting the cell - @MarkBaker [CodePlex #14086](https://phpexcel.codeplex.com/workitem/14086)
+- Added autoloader to DefaultValueBinder and AdvancedValueBinder - @MarkBaker
+- Modified PHPExcel_Shared_Date::isDateTimeFormatCode() to return false if format code begins with "_" or with "0 " to prevent false positives - @MarkBaker
+    - These leading characters are most commonly associated with number, currency or accounting (or occasionally fraction) formats- BUG : Excel5 and setReadFilter ? - @MarkBaker [CodePlex #14374](https://phpexcel.codeplex.com/workitem/14374)
+- Wrong exception message while deleting column - @MarkBaker [CodePlex #14425](https://phpexcel.codeplex.com/workitem/14425)
+- Formula evaluation fails with Japanese sheet refs - @MarkBaker [CodePlex #14679](https://phpexcel.codeplex.com/workitem/14679)
+- PHPExcel_Writer_PDF does not handle cell borders correctly - @MarkBaker [CodePlex #13559](https://phpexcel.codeplex.com/workitem/13559)
+- Style : applyFromArray() for 'allborders' not working - @MarkBaker [CodePlex #14831](https://phpexcel.codeplex.com/workitem/14831)
+
+### General
+
+- Using $this when not in object context in Excel5 Reader - @MarkBaker [CodePlex #14837](https://phpexcel.codeplex.com/workitem/14837)
+- Removes a unnecessary loop through each cell when applying conditional formatting to a range. - @MarkBaker
+- Removed spurious PHP end tags (?>) - @MarkBaker
+- Improved performance (speed) and reduced memory overheads, particularly for the Writers, but across the whole library. - @MarkBaker
+
+## [1.7.4] - 2010-08-26
+
+### Bugfixes
+
+- Excel5 : Formula : Power - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Excel5 : Formula : Unary plus - @Progi1984 [CodePlex #7895](https://phpexcel.codeplex.com/workitem/7895)
+- Excel5 : Just write the Escher stream if necessary in Worksheet - @Progi1984
+- Syntax errors in memcache.php 1.7.3c - @MarkBaker [CodePlex #13433](https://phpexcel.codeplex.com/workitem/13433)
+- Support for row or column ranges in the calculation engine, e.g. =SUM(C:C) or =SUM(1:2) - @MarkBaker
+    - Also support in the calculation engine for absolute row or column ranges e.g. =SUM($C:$E) or =SUM($3:5)- Picture problem with Excel 2003 - @Erik Tilt [CodePlex #13455](https://phpexcel.codeplex.com/workitem/13455)
+- Wrong variable used in addExternalSheet in PHPExcel.php - @MarkBaker [CodePlex #13484](https://phpexcel.codeplex.com/workitem/13484)
+- "Invalid cell coordinate" error when formula access data from an other sheet - @MarkBaker [CodePlex #13515](https://phpexcel.codeplex.com/workitem/13515)
+- (related to Work item 13515) Calculation engine confusing cell range worksheet when referencing cells in a different worksheet to the formula - @MarkBaker
+- Wrong var naming in Worksheet->garbageCollect() - @MarkBaker [CodePlex #13752](https://phpexcel.codeplex.com/workitem/13752)
+- PHPExcel_Style_*::__clone() methods cause cloning loops? - @MarkBaker [CodePlex #13764](https://phpexcel.codeplex.com/workitem/13764)
+- Recent builds causing problems loading xlsx files? (ZipArchive issue?) - @MarkBaker [CodePlex #11488](https://phpexcel.codeplex.com/workitem/11488)
+- cache_to_apc causes fatal error when processing large data sets - @MarkBaker [CodePlex #13856](https://phpexcel.codeplex.com/workitem/13856)
+- OOCalc reader misses first line if it's a 'table-header-row' - @MarkBaker [CodePlex #13880](https://phpexcel.codeplex.com/workitem/13880)
+- using cache with copy or clone bug? - @MarkBaker [CodePlex #14011](https://phpexcel.codeplex.com/workitem/14011)
+    - Fixed $worksheet->copy() or clone $worksheet when using cache_in_memory, cache_in_memory_gzip, cache_in_memory_serialized, cache_to_discISAM, cache_to_phpTemp, cache_to_apc and cache_to_memcache;
+    - Fixed but untested when using cache_to_wincache.
+### Features
+
+- Standard Deviation functions returning DIV/0 Error when Standard Deviation is zero - @MarkBaker [CodePlex #13450](https://phpexcel.codeplex.com/workitem/13450)
+- Support for print area with several ranges in the Excel2007 reader, and improved features for editing print area with several ranges - @MarkBaker
+- Improved Cell Exception Reporting - @MarkBaker [CodePlex #13769](https://phpexcel.codeplex.com/workitem/13769)
+
+### General
+
+- Fixed problems with reading Excel2007 Properties - @MarkBaker
+- PHP Strict Standards: Non-static method PHPExcel_Shared_String::utf16_decode() should not be called statically - @MarkBaker
+- Array functions were ignored when loading an existing file containing them, and as a result, they would lose their 'cse' status. - @MarkBaker
+- Minor memory tweaks to Excel2007 Writer - @MarkBaker
+- Modified ReferenceHelper updateFormulaReferences() method to handle updates to row and column cell ranges (including absolute references e.g. =SUM(A:$E) or =SUM($5:5), and range/cell references that reference a worksheet by name), and to provide both performance and memory improvements. - @MarkBaker
+- Modified Excel2007 Reader so that ReferenceHelper class is instantiated only once rather than for every shared formula in a workbook. - @MarkBaker
+- Correct handling for additional (synonym) formula tokens in Excel5 Reader - @MarkBaker
+- Additional reading of some Excel2007 Extended Properties (Company, Manager) - @MarkBaker
+
+## [1.7.3c] - 2010-06-01
+
+### Bugfixes
+
+- Fatal error: Class 'ZipArchive' not found... ...Reader/Excel2007.php on line 217 - @MarkBaker [CodePlex #13012](https://phpexcel.codeplex.com/workitem/13012)
+- PHPExcel_Writer_Excel2007 error after 1.7.3b - @MarkBaker [CodePlex #13398](https://phpexcel.codeplex.com/workitem/13398)
+
+## [1.7.3b] - 2010-05-31
+
+### Bugfixes
+
+- Infinite loop when reading - @MarkBaker [CodePlex #12903](https://phpexcel.codeplex.com/workitem/12903)
+- Wrong method chaining on PHPExcel_Worksheet class - @MarkBaker [CodePlex #13381](https://phpexcel.codeplex.com/workitem/13381)
+
+## [1.7.3] - 2010-05-17
+
+### General
+
+- Applied patch 4990 (modified) - @Erik Tilt
+- Applied patch 5568 (modified) - @MarkBaker
+- Applied patch 5943 - @MarkBaker
+- Upgrade build script to use Phing - @MarkBaker [CodePlex #13042](https://phpexcel.codeplex.com/workitem/13042)
+- Replacing var with public/private - @Erik Tilt [CodePlex #11586](https://phpexcel.codeplex.com/workitem/11586)
+- Applied Anthony's Sterling's Class Autoloader to reduce memory overhead by "Lazy Loading" of classes - @MarkBaker
+- Modification to functions that accept a date parameter to support string values containing ordinals as per Excel (English language only) - @MarkBaker
+- Modify PHPExcel_Style_NumberFormat::toFormattedString() to handle dates that fall outside of PHP's 32-bit date range - @MarkBaker
+- Applied patch 5207 - @MarkBaker
+
+### Features
+
+- PHPExcel developer documentation: Set page margins - @Erik Tilt [CodePlex #11970](https://phpexcel.codeplex.com/workitem/11970)
+- Special characters and accents in SYLK reader - @Erik Tilt [CodePlex #11038](https://phpexcel.codeplex.com/workitem/11038)
+- Implement more Excel calculation functions - @MarkBaker
+    - Implemented the COUPDAYS(), COUPDAYBS(), COUPDAYSNC(), COUPNCD(), COUPPCD() and PRICE() Financial functions
+    - Implemented the N() and TYPE() Information functions
+    - Implemented the HYPERLINK() Lookup and Reference function- Horizontal page break support in PHPExcel_Writer_PDF - @Erik Tilt [CodePlex #11526](https://phpexcel.codeplex.com/workitem/11526)
+- Introduce method setActiveSheetIndexByName() - @Erik Tilt [CodePlex #11529](https://phpexcel.codeplex.com/workitem/11529)
+- AdvancedValueBinder.php: Automatically wrap text when there is new line in string (ALT+"Enter") - @Erik Tilt [CodePlex #11550](https://phpexcel.codeplex.com/workitem/11550)
+- Data validation support in PHPExcel_Reader_Excel5 and PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10300](https://phpexcel.codeplex.com/workitem/10300)
+- Improve autosize calculation - @MarkBaker [CodePlex #11616](https://phpexcel.codeplex.com/workitem/11616)
+- Methods to translate locale-specific function names in formulae - @MarkBaker
+    - Language implementations for Czech (cs), Danish (da), German (de), English (uk), Spanish (es), Finnish (fi), French (fr), Hungarian (hu), Italian (it), Dutch (nl), Norwegian (no), Polish (pl), Portuguese (pt), Brazilian Portuguese (pt_br), Russian (ru) and Swedish (sv)- Implement document properties in Excel5 reader/writer - @Erik Tilt [CodePlex #9759](https://phpexcel.codeplex.com/workitem/9759)
+    - Fixed so far for PHPExcel_Reader_Excel5- Show/hide row and column headers in worksheet - @Erik Tilt [CodePlex #11849](https://phpexcel.codeplex.com/workitem/11849)
+- Can't set font on writing PDF (by key) - @Erik Tilt [CodePlex #11919](https://phpexcel.codeplex.com/workitem/11919)
+- Thousands scale (1000^n) support in PHPExcel_Style_NumberFormat::toFormattedString - @Erik Tilt [CodePlex #12096](https://phpexcel.codeplex.com/workitem/12096)
+- Implement repeating rows in PDF and HTML writer - @Erik Tilt
+- Sheet tabs in PHPExcel_Writer_HTML - @Erik Tilt [CodePlex #12289](https://phpexcel.codeplex.com/workitem/12289)
+- Add Wincache CachedObjectProvider - @MarkBaker [CodePlex #13041](https://phpexcel.codeplex.com/workitem/13041)
+- Configure PDF Writer paper size based on Excel Page Settings value, and provided methods to override paper size and page orientation with the writer - @MarkBaker
+    - Note PHPExcel defaults to Letter size, while the previous PDF writer enforced A4 size, so PDF writer will now default to Letter- Initial implementation of cell caching: allowing larger workbooks to be managed, but at a cost in speed - @MarkBaker
+
+### Bugfixes
+
+- Added an identify() method to the IO Factory that identifies the reader which will be used to load a particular file without actually loading it. - @MarkBaker
+- Warning messages with INDEX function having 2 arguments - @MarkBaker [CodePlex #10979](https://phpexcel.codeplex.com/workitem/10979)
+- setValue('=') should result in string instead of formula - @Erik Tilt [CodePlex #11473](https://phpexcel.codeplex.com/workitem/11473)
+- method _raiseFormulaError should no be private - @MarkBaker [CodePlex #11471](https://phpexcel.codeplex.com/workitem/11471)
+- Fatal error: Call to undefined function mb_substr() in ...Classes\PHPExcel\Reader\Excel5.php on line 2903 - @Erik Tilt [CodePlex #11485](https://phpexcel.codeplex.com/workitem/11485)
+- getBold(), getItallic(), getStrikeThrough() not always working with PHPExcel_Reader_Excel2007 - @Erik Tilt [CodePlex #11487](https://phpexcel.codeplex.com/workitem/11487)
+- AdvancedValueBinder.php not working correctly for $cell->setValue('hh:mm:ss') - @Erik Tilt [CodePlex #11492](https://phpexcel.codeplex.com/workitem/11492)
+- Fixed leap year handling for the YEARFRAC() Date/Time function when basis ia 1 (Actual/actual) - @MarkBaker
+- Warning messages - @MarkBaker [CodePlex #11490](https://phpexcel.codeplex.com/workitem/11490)
+    - Calculation Engine code modified to enforce strict standards for pass by reference- PHPExcel_Cell_AdvancedValueBinder doesnt work for dates in far future - @Erik Tilt [CodePlex #11483](https://phpexcel.codeplex.com/workitem/11483)
+- MSODRAWING bug with long CONTINUE record in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #11528](https://phpexcel.codeplex.com/workitem/11528)
+- PHPExcel_Reader_Excel2007 reads print titles as named range when there is more than one sheet - @Erik Tilt [CodePlex #11571](https://phpexcel.codeplex.com/workitem/11571)
+- missing @return in phpdocblock in reader classes - @Erik Tilt [CodePlex #11561](https://phpexcel.codeplex.com/workitem/11561)
+- AdvancedValueBinder.php: String sometimes becomes a date when it shouldn't - @Erik Tilt [CodePlex #11576](https://phpexcel.codeplex.com/workitem/11576)
+- Small numbers escape treatment in PHPExcel_Style_NumberFormat::toFormattedString() - @Erik Tilt [CodePlex #11588](https://phpexcel.codeplex.com/workitem/11588)
+- Blank styled cells are not blank in output by HTML writer due to &nbsp; - @Erik Tilt [CodePlex #11590](https://phpexcel.codeplex.com/workitem/11590)
+- Calculation engine bug: Existing, blank cell + number gives #NUM - @MarkBaker [CodePlex #11587](https://phpexcel.codeplex.com/workitem/11587)
+- AutoSize only measures length of first line in cell with multiple lines (ALT+Enter) - @Erik Tilt [CodePlex #11608](https://phpexcel.codeplex.com/workitem/11608)
+- Fatal error running Tests/12serializedfileformat.php (PHPExcel 1.7.2) - @Erik Tilt [CodePlex #11608](https://phpexcel.codeplex.com/workitem/11608)
+- Fixed various errors in the WORKDAY() and NETWORKDAYS() Date/Time functions (particularly related to holidays) - @MarkBaker
+- Uncaught exception 'Exception' with message 'Valid scale is between 10 and 400.' in Classes/PHPExcel/Worksheet/SheetView.php:115 - @Erik Tilt [CodePlex #11660](https://phpexcel.codeplex.com/workitem/11660)
+- "Unrecognized token 39 in formula" with PHPExcel_Reader_Excel5 (occuring with add-in functions) - @Erik Tilt [CodePlex #11551](https://phpexcel.codeplex.com/workitem/11551)
+- Excel2007 reader not reading PHPExcel_Style_Conditional::CONDITION_EXPRESSION - @Erik Tilt [CodePlex #11668](https://phpexcel.codeplex.com/workitem/11668)
+- Fix to the BESSELI(), BESSELJ(), BESSELK(), BESSELY() and COMPLEX() Engineering functions to use correct default values for parameters - @MarkBaker
+- DATEVALUE function not working for pure time values + allow DATEVALUE() function to handle partial dates (e.g. "1-Jun" or "12/2010") - @MarkBaker [CodePlex #11525](https://phpexcel.codeplex.com/workitem/11525)
+- Fix for empty quoted strings in formulae - @MarkBaker
+- Trap for division by zero in Bessel functions - @MarkBaker
+- Fix to OOCalc Reader to convert semi-colon (;) argument separator in formulae to a comma (,) - @MarkBaker
+- PHPExcel_Writer_Excel5_Parser cannot parse formula like =SUM(C$5:C5) - @Erik Tilt [CodePlex #11693](https://phpexcel.codeplex.com/workitem/11693)
+- Fix to OOCalc Reader to handle dates that fall outside 32-bit PHP's date range - @MarkBaker
+- File->sys_get_temp_dir() can fail in safe mode - @Erik Tilt [CodePlex #11692](https://phpexcel.codeplex.com/workitem/11692)
+- Sheet references in Excel5 writer do not work when referenced sheet title contains non-Latin symbols - @Erik Tilt [CodePlex #11727](https://phpexcel.codeplex.com/workitem/11727)
+- Bug in HTML writer can result in missing rows in output - @Erik Tilt [CodePlex #11743](https://phpexcel.codeplex.com/workitem/11743)
+- setShowGridLines(true) not working with PHPExcel_Writer_PDF - @Erik Tilt [CodePlex #11674](https://phpexcel.codeplex.com/workitem/11674)
+- PHPExcel_Worksheet_RowIterator initial position incorrect - @Erik Tilt [CodePlex #11836](https://phpexcel.codeplex.com/workitem/11836)
+- PHPExcel_Worksheet_HeaderFooterDrawing Strict Exception thrown (by jshaw86) - @Erik Tilt [CodePlex #11835](https://phpexcel.codeplex.com/workitem/11835)
+- Parts of worksheet lost when there are embedded charts (Excel5 reader) - @Erik Tilt [CodePlex #11850](https://phpexcel.codeplex.com/workitem/11850)
+- VLOOKUP() function error when lookup value is passed as a cell reference rather than an absolute value - @MarkBaker
+- First segment of Rich-Text not read correctly by PHPExcel_Reader_Excel2007 - @Erik Tilt [CodePlex #12041](https://phpexcel.codeplex.com/workitem/12041)
+- Fatal Error with getCell('name') when name matches the pattern for a cell reference - @MarkBaker [CodePlex #12048](https://phpexcel.codeplex.com/workitem/12048)
+- excel5 writer appears to be swapping image locations - @Erik Tilt [CodePlex #12039](https://phpexcel.codeplex.com/workitem/12039)
+- Undefined index: host in ZipStreamWrapper.php, line 94 and line 101 - @Erik Tilt [CodePlex #11954](https://phpexcel.codeplex.com/workitem/11954)
+- BIFF8 File Format problem (too short COLINFO record) - @Erik Tilt [CodePlex #11672](https://phpexcel.codeplex.com/workitem/11672)
+- Column width sometimes changed after read/write with Excel2007 reader/writer - @Erik Tilt [CodePlex #12121](https://phpexcel.codeplex.com/workitem/12121)
+- Worksheet.php throws a fatal error when styling is turned off via setReadDataOnly on the reader - @Erik Tilt [CodePlex #11964](https://phpexcel.codeplex.com/workitem/11964)
+- Checking for Circular References in Formulae - @MarkBaker [CodePlex #11851](https://phpexcel.codeplex.com/workitem/11851)
+    - Calculation Engine code now traps for cyclic references, raising an error or throwing an exception, or allows 1 or more iterations through cyclic references, based on a configuration setting- PNG transparency using Excel2007 writer - @Erik Tilt [CodePlex #12244](https://phpexcel.codeplex.com/workitem/12244)
+- Custom readfilter error when cell formulas reference excluded cells (Excel5 reader) - @Erik Tilt [CodePlex #12221](https://phpexcel.codeplex.com/workitem/12221)
+- Protection problem in XLS - @Erik Tilt [CodePlex #12288](https://phpexcel.codeplex.com/workitem/12288)
+- getColumnDimension()->setAutoSize() incorrect on cells with Number Formatting - @Erik Tilt [CodePlex #12300](https://phpexcel.codeplex.com/workitem/12300)
+- Notices reading Excel file with Add-in funcitons (PHPExcel_Reader_Excel5) - @Erik Tilt [CodePlex #12378](https://phpexcel.codeplex.com/workitem/12378)
+- Excel5 reader not reading formulas with deleted sheet references - @Erik Tilt [CodePlex #12380](https://phpexcel.codeplex.com/workitem/12380)
+- Named range (defined name) scope problems for in PHPExcel - @Erik Tilt [CodePlex #12404](https://phpexcel.codeplex.com/workitem/12404)
+- PHP Parse error: syntax error, unexpected T_PUBLIC in PHPExcel/Calculation.php on line 3482 - @Erik Tilt [CodePlex #12423](https://phpexcel.codeplex.com/workitem/12423)
+- Named ranges don't appear in name box using Excel5 writer - @Erik Tilt [CodePlex #12505](https://phpexcel.codeplex.com/workitem/12505)
+- Many merged cells + autoSize column -> slows down the writer - @Erik Tilt [CodePlex #12509](https://phpexcel.codeplex.com/workitem/12509)
+- Incorrect fallback order comment in Shared/Strings.php ConvertEncoding() - @Erik Tilt [CodePlex #12539](https://phpexcel.codeplex.com/workitem/12539)
+- IBM AIX iconv() will not work, should revert to mbstring etc. instead - @Erik Tilt [CodePlex #12538](https://phpexcel.codeplex.com/workitem/12538)
+- Excel5 writer and mbstring functions overload - @Erik Tilt [CodePlex #12568](https://phpexcel.codeplex.com/workitem/12568)
+- OFFSET needs to flattenSingleValue the $rows and $columns args - @MarkBaker [CodePlex #12672](https://phpexcel.codeplex.com/workitem/12672)
+- Formula with DMAX(): Notice: Undefined offset: 2 in ...\PHPExcel\Calculation.php on line 2365 - @MarkBaker [CodePlex #12546](https://phpexcel.codeplex.com/workitem/12546)
+    - Note that the Database functions have not yet been implemented- Call to a member function getParent() on a non-object in Classes\\PHPExcel\\Calculation.php Title is required - @MarkBaker [CodePlex #12839](https://phpexcel.codeplex.com/workitem/12839)
+- Cyclic Reference in Formula - @MarkBaker [CodePlex #12935](https://phpexcel.codeplex.com/workitem/12935)
+- Memory error...data validation? - @MarkBaker [CodePlex #13025](https://phpexcel.codeplex.com/workitem/13025)
+
+## [1.7.2] - 2010-01-11
+
+### General
+
+- Applied patch 4362 - @Erik Tilt
+- Applied patch 4363 (modified) - @Erik Tilt
+- 1.7.1 Extremely Slow - Refactored PHPExcel_Calculation_Functions::flattenArray() method and set calculation cache timer default to 2.5 seconds - @MarkBaker [CodePlex #10874](https://phpexcel.codeplex.com/workitem/10874)
+- Allow formulae to contain line breaks - @MarkBaker
+- split() function deprecated in PHP 5.3.0 - @Erik Tilt [CodePlex #10910](https://phpexcel.codeplex.com/workitem/10910)
+- sys_get_temp_dir() requires PHP 5.2.1, not PHP 5.2 [provide fallback function for PHP 5.2.0] - @Erik Tilt
+- Implementation of the ISPMT() Financial function by Matt Groves - @MarkBaker
+- Put the example of formula with more arguments in documentation - @MarkBaker [CodePlex #11052](https://phpexcel.codeplex.com/workitem/11052)
+
+### Features
+
+- Improved accuracy for the GAMMAINV() Statistical Function - @MarkBaker
+- XFEXT record support to fix colors change from Excel5 reader, and copy/paste color change with Excel5 writer - @Erik Tilt [CodePlex #10409](https://phpexcel.codeplex.com/workitem/10409)
+    - Excel5 reader reads RGB color information in XFEXT records for borders, font color and fill color- Implement more Excel calculation functions - @MarkBaker
+    - Implemented the FVSCHEDULE(), XNPV(), IRR(), MIRR(), XIRR() and RATE() Financial functions
+    - Implemented the SUMPRODUCT() Mathematical function
+    - Implemented the ZTEST() Statistical Function- Multiple print areas in one sheet - @Erik Tilt [CodePlex #10919](https://phpexcel.codeplex.com/workitem/10919)
+- Store calculated values in output by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10930](https://phpexcel.codeplex.com/workitem/10930)
+- Sheet protection options in Excel5 reader/writer - @Erik Tilt [CodePlex #10939](https://phpexcel.codeplex.com/workitem/10939)
+- Modification of the COUNT(), AVERAGE(), AVERAGEA(), DEVSQ, AVEDEV(), STDEV(), STDEVA(), STDEVP(), STDEVPA(), VARA() and VARPA() SKEW() and KURT() functions to correctly handle boolean values depending on whether they're passed in as values, values within a matrix or values within a range of cells. - @MarkBaker
+- Cell range selection - @Erik Tilt
+- Root-relative path handling - @MarkBaker [CodePlex #10266](https://phpexcel.codeplex.com/workitem/10266)
+
+### Bugfixes
+
+- Named Ranges not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #11315](https://phpexcel.codeplex.com/workitem/11315)
+- Excel2007 Reader fails to load Apache POI generated Excel - @MarkBaker [CodePlex #11206](https://phpexcel.codeplex.com/workitem/11206)
+- Number format is broken when system's thousands separator is empty - @MarkBaker [CodePlex #11154](https://phpexcel.codeplex.com/workitem/11154)
+- ReferenceHelper::updateNamedFormulas throws errors if oldName is empty - @MarkBaker [CodePlex #11401](https://phpexcel.codeplex.com/workitem/11401)
+- parse_url() fails to parse path to an image in xlsx - @MarkBaker [CodePlex #11296](https://phpexcel.codeplex.com/workitem/11296)
+- Workaround for iconv_substr() bug in PHP 5.2.0 - @Erik Tilt [CodePlex #10876](https://phpexcel.codeplex.com/workitem/10876)
+- 1 pixel error for image width and height with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10877](https://phpexcel.codeplex.com/workitem/10877)
+- Fix to GEOMEAN() Statistical function - @MarkBaker
+- setValue('-') and setValue('.') sets numeric 0 instead of 1-character string - @Erik Tilt [CodePlex #10884](https://phpexcel.codeplex.com/workitem/10884)
+- Row height sometimes much too low after read with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10885](https://phpexcel.codeplex.com/workitem/10885)
+- Diagonal border. Miscellaneous missing support. - @Erik Tilt [CodePlex #10888](https://phpexcel.codeplex.com/workitem/10888)
+    - Constant PHPExcel_Style_Borders::DIAGONAL_BOTH added to support double-diagonal (cross)
+    - PHPExcel_Reader_Excel2007 not always reading diagonal borders (only recognizes 'true' and not '1')
+    - PHPExcel_Reader_Excel5 support for diagonal borders
+    - PHPExcel_Writer_Excel5 support for diagonal borders- Session bug: Fatal error: Call to a member function bindValue() on a non-object in ...\Classes\PHPExcel\Cell.php on line 217 - @Erik Tilt [CodePlex #10894](https://phpexcel.codeplex.com/workitem/10894)
+- Colors messed up saving twice with same instance of PHPExcel_Writer_Excel5 (regression since 1.7.0) - @Erik Tilt [CodePlex #10896](https://phpexcel.codeplex.com/workitem/10896)
+- Method PHPExcel_Worksheet::setDefaultStyle is not working - @Erik Tilt [CodePlex #10917](https://phpexcel.codeplex.com/workitem/10917)
+- PHPExcel_Reader_CSV::canRead() sometimes says false when it shouldn't - @Erik Tilt [CodePlex #10897](https://phpexcel.codeplex.com/workitem/10897)
+- Changes in workbook not picked up between two saves with PHPExcel_Writer_Excel2007 - @Erik Tilt [CodePlex #10922](https://phpexcel.codeplex.com/workitem/10922)
+- Decimal and thousands separators missing in HTML and PDF output - @Erik Tilt [CodePlex #10913](https://phpexcel.codeplex.com/workitem/10913)
+- Notices with PHPExcel_Reader_Excel5 and named array constants - @Erik Tilt [CodePlex #10936](https://phpexcel.codeplex.com/workitem/10936)
+- Calculation engine limitation on 32-bit platform with integers > 2147483647 - @MarkBaker [CodePlex #10938](https://phpexcel.codeplex.com/workitem/10938)
+- Shared(?) formulae containing absolute cell references not read correctly using Excel5 Reader - @Erik Tilt [CodePlex #10959](https://phpexcel.codeplex.com/workitem/10959)
+- Warning messages with intersection operator involving single cell - @MarkBaker [CodePlex #10962](https://phpexcel.codeplex.com/workitem/10962)
+- Infinite loop in Excel5 reader caused by zero-length string in SST - @Erik Tilt [CodePlex #10980](https://phpexcel.codeplex.com/workitem/10980)
+- Remove unnecessary cell sorting to improve speed by approx. 18% in HTML and PDF writers - @Erik Tilt [CodePlex #10983](https://phpexcel.codeplex.com/workitem/10983)
+- Cannot read A1 cell content - OO_Reader - @MarkBaker [CodePlex #10977](https://phpexcel.codeplex.com/workitem/10977)
+- Transliteration failed, invalid encoding - @Erik Tilt [CodePlex #11000](https://phpexcel.codeplex.com/workitem/11000)
+
+## [1.7.1] - 2009-11-02
+
+### General
+
+- ereg() function deprecated in PHP 5.3.0 - @Erik Tilt [CodePlex #10687](https://phpexcel.codeplex.com/workitem/10687)
+- Writer Interface Inconsequence - setTempDir and setUseDiskCaching - @MarkBaker [CodePlex #10739](https://phpexcel.codeplex.com/workitem/10739)
+
+### Features
+
+- Upgrade to TCPDF 4.8.009 - @Erik Tilt
+- Support for row and column styles (feature request) - @Erik Tilt
+    - Basic implementation for Excel2007/Excel5 reader/writer- Hyperlink to local file in Excel5 reader/writer - @Erik Tilt [CodePlex #10459](https://phpexcel.codeplex.com/workitem/10459)
+- Color Tab (Color Sheet's name) - @MarkBaker [CodePlex #10472](https://phpexcel.codeplex.com/workitem/10472)
+- Border style "double" support in PHPExcel_Writer_HTML - @Erik Tilt [CodePlex #10488](https://phpexcel.codeplex.com/workitem/10488)
+- Multi-section number format support in HTML/PDF/CSV writers - @Erik Tilt [CodePlex #10492](https://phpexcel.codeplex.com/workitem/10492)
+- Some additional performance tweaks in the calculation engine - @MarkBaker
+- Fix result of DB() and DDB() Financial functions to 2dp when in Gnumeric Compatibility mode - @MarkBaker
+- Added AMORDEGRC(), AMORLINC() and COUPNUM() Financial function (no validation of parameters yet) - @MarkBaker
+- Improved accuracy of TBILLEQ(), TBILLPRICE() and TBILLYIELD() Financial functions when in Excel or Gnumeric mode - @MarkBaker
+- Added INDIRECT() Lookup/Reference function (only supports full addresses at the moment) - @MarkBaker
+- PHPExcel_Reader_CSV::canRead() improvements - @MarkBaker [CodePlex #10498](https://phpexcel.codeplex.com/workitem/10498)
+- Input encoding option for PHPExcel_Reader_CSV - @Erik Tilt [CodePlex #10500](https://phpexcel.codeplex.com/workitem/10500)
+- Colored number format support, e.g. [Red], in HTML/PDF output - @Erik Tilt [CodePlex #10493](https://phpexcel.codeplex.com/workitem/10493)
+- Color Tab (Color Sheet's name) [Excel5 reader/writer support] - @Erik Tilt [CodePlex #10559](https://phpexcel.codeplex.com/workitem/10559)
+- Initial version of SYLK (slk) and Excel 2003 XML Readers (Cell data and basic cell formatting) - @MarkBaker
+- Initial version of Open Office Calc (ods) Reader (Cell data only) - @MarkBaker
+- Initial use of "pass by reference" in the calculation engine for ROW() and COLUMN() Lookup/Reference functions - @MarkBaker
+- COLUMNS() and ROWS() Lookup/Reference functions, and SUBSTITUTE() Text function - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- AdvancedValueBinder(): Re-enable zero-padded string-to-number conversion, e.g '0004' -> 4 - @Erik Tilt [CodePlex #10502](https://phpexcel.codeplex.com/workitem/10502)
+- Make PHP type match Excel datatype - @Erik Tilt [CodePlex #10600](https://phpexcel.codeplex.com/workitem/10600)
+- Change first page number on header - @MarkBaker [CodePlex #10630](https://phpexcel.codeplex.com/workitem/10630)
+- Applied patch 3941 - @MarkBaker
+- Hidden sheets - @MB,ET [CodePlex #10745](https://phpexcel.codeplex.com/workitem/10745)
+- mbstring fallback when iconv is broken - @Erik Tilt [CodePlex #10761](https://phpexcel.codeplex.com/workitem/10761)
+- Note, can't yet handle comparison of two matrices - @MarkBaker
+- Improved handling for validation and error trapping in a number of functions - @MarkBaker
+- Improved support for fraction number formatting - @MarkBaker
+- Support Reading CSV with Byte Order Mark (BOM) - @Erik Tilt [CodePlex #10455](https://phpexcel.codeplex.com/workitem/10455)
+
+### Bugfixes
+
+- addExternalSheet() at specified index - @Erik Tilt [CodePlex #10860](https://phpexcel.codeplex.com/workitem/10860)
+- Named range can no longer be passed to worksheet->getCell() - @MarkBaker [CodePlex #10684](https://phpexcel.codeplex.com/workitem/10684)
+- RichText HTML entities no longer working in PHPExcel 1.7.0 - @Erik Tilt [CodePlex #10455](https://phpexcel.codeplex.com/workitem/10455)
+- Fit-to-width value of 1 is lost after read/write of Excel2007 spreadsheet [+ support for simultaneous scale/fitToPage] - @Erik Tilt
+- Performance issue identified by profiling - @MarkBaker [CodePlex #10469](https://phpexcel.codeplex.com/workitem/10469)
+- setSelectedCell is wrong - @Erik Tilt [CodePlex #10473](https://phpexcel.codeplex.com/workitem/10473)
+- Images get squeezed/stretched with (Mac) Verdana 10 Excel files using Excel5 reader/writer - @Erik Tilt [CodePlex #10481](https://phpexcel.codeplex.com/workitem/10481)
+- Error in argument count for DATEDIF() function - @MarkBaker [CodePlex #10482](https://phpexcel.codeplex.com/workitem/10482)
+- updateFormulaReferences is buggy - @MarkBaker [CodePlex #10452](https://phpexcel.codeplex.com/workitem/10452)
+- CellIterator returns null Cell if onlyExistingCells is set and key() is in use - @MarkBaker [CodePlex #10485](https://phpexcel.codeplex.com/workitem/10485)
+- Wrong RegEx for parsing cell references in formulas - @MarkBaker [CodePlex #10453](https://phpexcel.codeplex.com/workitem/10453)
+- Optimisation subverted to devastating effect if IterateOnlyExistingCells is clear - @MarkBaker [CodePlex #10486](https://phpexcel.codeplex.com/workitem/10486)
+- Fatal error: Uncaught exception 'Exception' with message 'Unrecognized token 6C in formula'... with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10494](https://phpexcel.codeplex.com/workitem/10494)
+- Fractions stored as text are not treated as numbers by PHPExcel's calculation engine - @MarkBaker [CodePlex #10490](https://phpexcel.codeplex.com/workitem/10490)
+- AutoFit (autosize) row height not working in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10503](https://phpexcel.codeplex.com/workitem/10503)
+- Fixed problem with null values breaking the calculation stack - @MarkBaker
+- Date number formats sometimes fail with PHPExcel_Style_NumberFormat::toFormattedString, e.g. [$-40047]mmmm d yyyy - @Erik Tilt [CodePlex #10524](https://phpexcel.codeplex.com/workitem/10524)
+- Fixed minor problem with DATEDIFF YM calculation - @MarkBaker
+- Applied patch 3695 - @MarkBaker
+- setAutosize() and Date cells not working properly - @Erik Tilt [CodePlex #10536](https://phpexcel.codeplex.com/workitem/10536)
+- Time value hour offset in output by HTML/PDF/CSV writers (system timezone problem) - @Erik Tilt [CodePlex #10556](https://phpexcel.codeplex.com/workitem/10556)
+- Control characters 0x14-0x1F are not treated by PHPExcel - @Erik Tilt [CodePlex #10558](https://phpexcel.codeplex.com/workitem/10558)
+- PHPExcel_Writer_Excel5 not working when open_basedir restriction is in effect - @Erik Tilt [CodePlex #10560](https://phpexcel.codeplex.com/workitem/10560)
+- IF formula calculation problem in PHPExcel 1.7.0 (string comparisons) - @MarkBaker [CodePlex #10563](https://phpexcel.codeplex.com/workitem/10563)
+- Improved CODE() Text function result for UTF-8 characters - @MarkBaker
+- Empty rows are collapsed with HTML/PDF writer - @Erik Tilt [CodePlex #10568](https://phpexcel.codeplex.com/workitem/10568)
+- Gaps between rows in output by PHPExcel_Writer_PDF (Upgrading to TCPDF 4.7.003) - @Erik Tilt [CodePlex #10569](https://phpexcel.codeplex.com/workitem/10569)
+- Problem reading formulas (Excel5 reader problem with "fake" shared formulas) - @Erik Tilt [CodePlex #10575](https://phpexcel.codeplex.com/workitem/10575)
+- Error type in formula: "_raiseFormulaError message is Formula Error: An unexpected error occured" - @MarkBaker [CodePlex #10588](https://phpexcel.codeplex.com/workitem/10588)
+- Miscellaneous column width problems in Excel5/Excel2007 writer - @Erik Tilt [CodePlex #10599](https://phpexcel.codeplex.com/workitem/10599)
+- Reader/Excel5 'Unrecognized token 2D in formula' in latest version - @Erik Tilt [CodePlex #10615](https://phpexcel.codeplex.com/workitem/10615)
+- on php 5.3 PHPExcel 1.7 Excel 5 reader fails in _getNextToken, token = 2C, throws exception - @Erik Tilt [CodePlex #10623](https://phpexcel.codeplex.com/workitem/10623)
+- Fatal error when altering styles after workbook has been saved - @Erik Tilt [CodePlex #10617](https://phpexcel.codeplex.com/workitem/10617)
+- Images vertically stretched or squeezed when default font size is changed (PHPExcel_Writer_Excel5) - @Erik Tilt [CodePlex #10661](https://phpexcel.codeplex.com/workitem/10661)
+- Styles not read in "manipulated" Excel2007 workbook - @Erik Tilt [CodePlex #10676](https://phpexcel.codeplex.com/workitem/10676)
+- Windows 7 says corrupt file by PHPExcel_Writer_Excel5 when opening in Excel - @Erik Tilt [CodePlex #10059](https://phpexcel.codeplex.com/workitem/10059)
+- Calculations sometimes not working with cell references to other sheets - @MarkBaker [CodePlex #10708](https://phpexcel.codeplex.com/workitem/10708)
+- Problem with merged cells after insertNewRowBefore() - @Erik Tilt [CodePlex #10706](https://phpexcel.codeplex.com/workitem/10706)
+- Applied patch 4023 - @MarkBaker
+- Fix to SUMIF() and COUNTIF() Statistical functions for when condition is a match against a string value - @MarkBaker
+- PHPExcel_Cell::coordinateFromString should throw exception for bad string parameter - @Erik Tilt [CodePlex #10721](https://phpexcel.codeplex.com/workitem/10721)
+- EucrosiaUPC (Thai font) not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10723](https://phpexcel.codeplex.com/workitem/10723)
+- Improved the return of calculated results when the result value is an array - @MarkBaker
+- Allow calculation engine to support Functions prefixed with @ within formulae - @MarkBaker
+- Intersection operator (space operator) fatal error with calculation engine - @MarkBaker [CodePlex #10632](https://phpexcel.codeplex.com/workitem/10632)
+- Chinese, Japanese, Korean characters show as squares in PDF - @Erik Tilt [CodePlex #10742](https://phpexcel.codeplex.com/workitem/10742)
+- sheet title allows invalid characters - @Erik Tilt [CodePlex #10756](https://phpexcel.codeplex.com/workitem/10756)
+- Sheet!$A$1 as function argument in formula causes infinite loop in Excel5 writer - @Erik Tilt [CodePlex #10757](https://phpexcel.codeplex.com/workitem/10757)
+- Cell range involving name not working with calculation engine - Modified calculation parser to handle range operator (:), but doesn't currently handle worksheet references with spaces or other non-alphameric characters, or trap erroneous references - @MarkBaker [CodePlex #10740](https://phpexcel.codeplex.com/workitem/10740)
+- DATE function problem with calculation engine (says too few arguments given) - @MarkBaker [CodePlex #10798](https://phpexcel.codeplex.com/workitem/10798)
+- Blank cell can cause wrong calculated value - @MarkBaker [CodePlex #10799](https://phpexcel.codeplex.com/workitem/10799)
+- Modified ROW() and COLUMN() Lookup/Reference Functions to return an array when passed a cell range, plus some additional work on INDEX() - @MarkBaker
+- Images not showing in Excel 97 using PHPExcel_Writer_Excel5 (patch by Jordi Gutiérrez Hermoso) - @Erik Tilt [CodePlex #10817](https://phpexcel.codeplex.com/workitem/10817)
+- When figures are contained in the excel sheet, Reader was stopped - @Erik Tilt [CodePlex #10785](https://phpexcel.codeplex.com/workitem/10785)
+- Formulas changed after insertNewRowBefore() - @MarkBaker [CodePlex #10818](https://phpexcel.codeplex.com/workitem/10818)
+- Cell range row offset problem with shared formulas using PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10825](https://phpexcel.codeplex.com/workitem/10825)
+- Warning: Call-time pass-by-reference has been deprecated - @MarkBaker [CodePlex #10832](https://phpexcel.codeplex.com/workitem/10832)
+- Image should "Move but don't size with cells" instead of "Move and size with cells" with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10849](https://phpexcel.codeplex.com/workitem/10849)
+- Opening a Excel5 generated XLS in Excel 2007 results in header/footer entry not showing on input - @Erik Tilt [CodePlex #10856](https://phpexcel.codeplex.com/workitem/10856)
+- addExternalSheet() not returning worksheet - @Erik Tilt [CodePlex #10859](https://phpexcel.codeplex.com/workitem/10859)
+- Invalid results in formulas with named ranges - @MarkBaker [CodePlex #10629](https://phpexcel.codeplex.com/workitem/10629)
+
+## [1.7.0] - 2009-08-10
+
+### General
+
+- Expand documentation: Number formats - @Erik Tilt
+- Class 'PHPExcel_Cell_AdvancedValueBinder' not found - @Erik Tilt
+
+### Features
+
+- Change return type of date functions to PHPExcel_Calculation_Functions::RETURNDATE_EXCEL - @MarkBaker
+- New RPN and stack-based calculation engine for improved performance of formula calculation - @MarkBaker
+    - Faster (anything between 2 and 12 times faster than the old parser, depending on the complexity and nature of the formula)
+    - Significantly more memory efficient when formulae reference cells across worksheets
+    - Correct behaviour when referencing Named Ranges that exist on several worksheets
+    - Support for Excel ^ (Exponential) and % (Percentage) operators
+    - Support for matrices within basic arithmetic formulae (e.g. ={1,2,3;4,5,6;7,8,9}/2)
+    - Better trapping/handling of NaN and infinity results (return #NUM! error)
+    - Improved handling of empty parameters for Excel functions
+    - Optional logging of calculation steps- New calculation engine can be accessed independently of workbooks (for use as a standalone calculator) - @MarkBaker
+- Implement more Excel calculation functions - @MarkBaker
+    - Initial implementation of the COUNTIF() and SUMIF() Statistical functions
+    - Added ACCRINT() Financial function- Modifications to number format handling for dddd and ddd masks in dates, use of thousand separators even when locale only implements it for money, and basic fraction masks (0 ?/? and ?/?) - @MarkBaker
+- Support arbitrary fixed number of decimals in PHPExcel_Style_NumberFormat::toFormattedString() - @Erik Tilt
+- Improving performance and memory on data dumps - @Erik Tilt
+    - Various style optimizations (merging from branch wi6857-memory)
+    - Moving hyperlink and dataValidation properties from cell to worksheet for lower PHP memory usage- Provide fluent interfaces where possible - @MarkBaker
+- Make easy way to apply a border to a rectangular selection - @Erik Tilt
+- Support for system window colors in PHPExcel_Reader_Excel5 - @Erik Tilt
+- Horizontal center across selection - @Erik Tilt
+- Merged cells record, write to full record size in PHPExcel_Writer_Excel5 - @Erik Tilt
+- Add page break between sheets in exported PDF - @MarkBaker
+- Sanitization of UTF-8 input for cell values - @Erik Tilt
+- Read cached calculated value with PHPExcel_Reader_Excel5 - @Erik Tilt
+- Miscellaneous CSS improvements for PHPExcel_Writer_HTML - @Erik Tilt
+- getProperties: setCompany feature request - @Erik Tilt
+- Insert worksheet at a specified index - @MarkBaker
+- Change worksheet index - @MarkBaker
+- Readfilter for CSV reader - @MarkBaker
+- Check value of mbstring.func_overload when saving with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10172](https://phpexcel.codeplex.com/workitem/10172)
+- Eliminate dependency of an include path pointing to class directory - @Erik Tilt [CodePlex #10251](https://phpexcel.codeplex.com/workitem/10251)
+- Method for getting the correct reader for a certain file (contribution) - @Erik Tilt [CodePlex #10292](https://phpexcel.codeplex.com/workitem/10292)
+- Choosing specific row in fromArray method - @Erik Tilt [CodePlex #10287](https://phpexcel.codeplex.com/workitem/10287)
+- Shared formula support in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10319](https://phpexcel.codeplex.com/workitem/10319)
+
+### Bugfixes
+
+- Right-to-left column direction in worksheet - @MB,ET [CodePlex #10345](https://phpexcel.codeplex.com/workitem/10345)
+- PHPExcel_Reader_Excel5 not reading PHPExcel_Style_NumberFormat::FORMAT_NUMBER ('0') - @Erik Tilt
+- Fractional row height in locale other than English results in corrupt output using PHPExcel_Writer_Excel2007 - @Erik Tilt
+- Fractional (decimal) numbers not inserted correctly when locale is other than English - @Erik Tilt
+- Fractional calculated value in locale other than English results in corrupt output using PHPExcel_Writer_Excel2007 - @Erik Tilt
+- Locale aware decimal and thousands separator in exported formats HTML, CSV, PDF - @Erik Tilt
+- Cannot Add Image with Space on its Name - @MarkBaker
+- Black line at top of every page in output by PHPExcel_Writer_PDF - @Erik Tilt
+- Border styles and border colors not showing in HTML output (regression since 1.6.4) - @Erik Tilt
+- Hidden screen gridlines setting in worksheet not read by PHPExcel_Reader_Excel2007 - @Erik Tilt
+- Some valid sheet names causes corrupt output using PHPExcel_Writer_Excel2007 - @MarkBaker
+- More than 32,767 characters in a cell gives corrupt Excel file - @Erik Tilt
+- Images not getting copyied with the ->copy() function - @Erik Tilt
+- Bad calculation of column width setAutoSize(true) function - @Erik Tilt
+- Dates are sometimes offset by 1 day in output by HTML and PDF writers depending on system timezone setting - @Erik Tilt
+- Wingdings symbol fonts not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10003](https://phpexcel.codeplex.com/workitem/10003)
+- White space string prefix stripped by PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #10010](https://phpexcel.codeplex.com/workitem/10010)
+- The name of the Workbook stream MUST be "Workbook", not "Book" - @Erik Tilt [CodePlex #10023](https://phpexcel.codeplex.com/workitem/10023)
+- Avoid message "Microsoft Excel recalculates formulas..." when closing xls file from Excel - @Erik Tilt [CodePlex #10030](https://phpexcel.codeplex.com/workitem/10030)
+- Non-unique newline representation causes problems with LEN formula - @Erik Tilt [CodePlex #10031](https://phpexcel.codeplex.com/workitem/10031)
+- Newline in cell not showing with PHPExcel_Writer_HTML and PHPExcel_Writer_PDF - @Erik Tilt [CodePlex #10033](https://phpexcel.codeplex.com/workitem/10033)
+- Rich-Text strings get prefixed by &nbsp; when output by HTML writer - @Erik Tilt [CodePlex #10046](https://phpexcel.codeplex.com/workitem/10046)
+- Leading spaces do not appear in output by HTML/PDF writers - @Erik Tilt [CodePlex #10052](https://phpexcel.codeplex.com/workitem/10052)
+- Empty Apache POI-generated file can not be read - @MarkBaker [CodePlex #10061](https://phpexcel.codeplex.com/workitem/10061)
+- Column width not scaling correctly with font size in HTML and PDF writers - @Erik Tilt [CodePlex #10068](https://phpexcel.codeplex.com/workitem/10068)
+- Inaccurate row heights with HTML writer - @Erik Tilt [CodePlex #10069](https://phpexcel.codeplex.com/workitem/10069)
+- Reference helper - @MarkBaker
+- Excel 5 Named ranges should not be local to the worksheet, but accessible from all worksheets - @MarkBaker
+- Row heights are ignored by PHPExcel_Writer_PDF - @Erik Tilt [CodePlex #10088](https://phpexcel.codeplex.com/workitem/10088)
+- Write raw XML - @MarkBaker
+- removeRow(), removeColumn() not always clearing cell values - @Erik Tilt [CodePlex #10098](https://phpexcel.codeplex.com/workitem/10098)
+- Problem reading certain hyperlink records with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10142](https://phpexcel.codeplex.com/workitem/10142)
+- Hyperlink cell range read failure with PHPExcel_Reader_Excel2007 - @Erik Tilt [CodePlex #10143](https://phpexcel.codeplex.com/workitem/10143)
+- 'Column string index can not be empty.' - @MarkBaker [CodePlex #10149](https://phpexcel.codeplex.com/workitem/10149)
+- getHighestColumn() sometimes says there are 256 columns with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10204](https://phpexcel.codeplex.com/workitem/10204)
+- extractSheetTitle fails when sheet title contains exclamation mark (!) - @Erik Tilt [CodePlex #10220](https://phpexcel.codeplex.com/workitem/10220)
+- setTitle() sometimes erroneously appends integer to sheet name - @Erik Tilt [CodePlex #10221](https://phpexcel.codeplex.com/workitem/10221)
+- Mac BIFF5 Excel file read failure (missing support for Mac OS Roman character set) - @Erik Tilt [CodePlex #10229](https://phpexcel.codeplex.com/workitem/10229)
+- BIFF5 header and footer incorrectly read by PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10230](https://phpexcel.codeplex.com/workitem/10230)
+- iconv notices when reading hyperlinks with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10259](https://phpexcel.codeplex.com/workitem/10259)
+- Excel5 reader OLE read failure with small Mac BIFF5 Excel files - @Erik Tilt [CodePlex #10252](https://phpexcel.codeplex.com/workitem/10252)
+- Problem in reading formula : IF( IF ) with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10272](https://phpexcel.codeplex.com/workitem/10272)
+- Error reading formulas referencing external sheets with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10274](https://phpexcel.codeplex.com/workitem/10274)
+- Image horizontally stretched when default font size is increased (PHPExcel_Writer_Excel5) - @Erik Tilt [CodePlex #10291](https://phpexcel.codeplex.com/workitem/10291)
+- Undefined offset in Reader\Excel5.php on line 3572 - @Erik Tilt [CodePlex #10333](https://phpexcel.codeplex.com/workitem/10333)
+- PDF output different then XLS (copied data) - @MarkBaker [CodePlex #10340](https://phpexcel.codeplex.com/workitem/10340)
+- Internal hyperlinks with UTF-8 sheet names not working in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #10352](https://phpexcel.codeplex.com/workitem/10352)
+- String shared formula result read error with PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #10361](https://phpexcel.codeplex.com/workitem/10361)
+- Uncaught exception 'Exception' with message 'Valid scale is between 10 and 400.' in Classes/PHPExcel/Worksheet/PageSetup.php:338 - @Erik Tilt [CodePlex #10363](https://phpexcel.codeplex.com/workitem/10363)
+- Using setLoadSheetsOnly fails if you do not use setReadDataOnly(true) and sheet is not the first sheet - @Erik Tilt [CodePlex #10355](https://phpexcel.codeplex.com/workitem/10355)
+- getCalculatedValue() sometimes incorrect with IF formula and 0-values - @MarkBaker [CodePlex #10362](https://phpexcel.codeplex.com/workitem/10362)
+- Excel Reader 2007 problem with "shared" formulae when "master" is an error - @MarkBaker
+- Named Range Bug, using the same range name on different worksheets - @MarkBaker
+- Java code in JAMA classes - @MarkBaker
+- getCalculatedValue() not working with some formulas involving error types - @MarkBaker
+- evaluation of both return values in an IF() statement returning an error if either result was an error, irrespective of the IF evaluation - @MarkBaker
+- Power in formulas: new calculation engine no longer treats ^ as a bitwise XOR operator - @MarkBaker
+- Bugfixes and improvements to many of the Excel functions in PHPExcel - @MarkBaker
+    - Added optional "places" parameter in the BIN2HEX(), BIN2OCT, DEC2BIN(), DEC2OCT(), DEC2HEX(), HEX2BIN(), HEX2OCT(), OCT2BIN() and OCT2HEX() Engineering Functions
+    - Trap for unbalanced matrix sizes in MDETERM() and MINVERSE() Mathematic and Trigonometric functions
+    - Fix for default characters parameter value for LEFT() and RIGHT() Text functions
+    - Fix for GCD() and LCB() Mathematical functions when the parameters include a zero (0) value
+    - Fix for BIN2OCT() Engineering Function for 2s complement values (which were returning hex values)
+    - Fix for BESSELK() and BESSELY() Engineering functions
+    - Fix for IMDIV() Engineering Function when result imaginary component is positive (wasn't setting the sign)
+    - Fix for ERF() Engineering Function when called with an upper limit value for the integration
+    - Fix to DATE() Date/Time Function for year value of 0
+    - Set ISPMT() function as category FINANCIAL
+    - Fix for DOLLARDE() and DOLLARFR() Financial functions
+    - Fix to EFFECT() Financial function (treating $nominal_rate value as a variable name rather than a value)
+    - Fix to CRITBINOM() Statistical function (CurrentValue and EssentiallyZero treated as constants rather than variables)
+    - Note that an Error in the function logic can still lead to a permanent loop
+    - Fix to MOD() Mathematical function to work with floating point results
+    - Fix for QUOTIENT() Mathematical function
+    - Fix to HOUR(), MINUTE() and SECOND() Date/Time functions to return an error when passing in a floating point value of 1.0 or greater, or less than 0
+    - LOG() Function now correctly returns base-10 log when called with only one parameter, rather than the natural log as the default base
+    - Modified text functions to handle multibyte character set (UTF-8).
+
+## [1.6.7] - 2009-04-22
+
+### BREAKING CHANGE
+
+In previous versions of PHPExcel up to and including 1.6.6,
+when a cell had a date-like number format code, it was possible to enter a date
+directly using an integer PHP-time without converting to Excel date format.
+Starting with PHPExcel 1.6.7 this is no longer supported. Refer to the developer
+documentation for more information on entering dates into a cell.
+
+### General
+
+- Deprecate misspelled setStriketrough() and getStriketrough() methods - @MarkBaker [CodePlex #9416](https://phpexcel.codeplex.com/workitem/9416)
+
+### Features
+
+- Performance improvement when saving file - @MarkBaker [CodePlex #9526](https://phpexcel.codeplex.com/workitem/9526)
+- Check that sheet title has maximum 31 characters - @MarkBaker [CodePlex #9598](https://phpexcel.codeplex.com/workitem/9598)
+- True support for Excel built-in number format codes - @MB, ET [CodePlex #9631](https://phpexcel.codeplex.com/workitem/9631)
+- Ability to read defect BIFF5 Excel file without CODEPAGE record - @Erik Tilt [CodePlex #9683](https://phpexcel.codeplex.com/workitem/9683)
+- Auto-detect which reader to invoke - @MarkBaker [CodePlex #9701](https://phpexcel.codeplex.com/workitem/9701)
+- Deprecate insertion of dates using PHP-time (Unix time) [request for removal of feature] - @Erik Tilt [CodePlex #9214](https://phpexcel.codeplex.com/workitem/9214)
+- Support for entering time values like '9:45', '09:45' using AdvancedValueBinder - @Erik Tilt [CodePlex #9747](https://phpexcel.codeplex.com/workitem/9747)
+
+### Bugfixes
+
+- DataType dependent horizontal alignment in HTML and PDF writer - @Erik Tilt [CodePlex #9797](https://phpexcel.codeplex.com/workitem/9797)
+- Cloning data validation object causes script to stop - @MarkBaker [CodePlex #9375](https://phpexcel.codeplex.com/workitem/9375)
+- Simultaneous repeating rows and repeating columns not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #9400](https://phpexcel.codeplex.com/workitem/9400)
+- Simultaneous repeating rows and repeating columns not working with PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #9399](https://phpexcel.codeplex.com/workitem/9399)
+- Row outline level not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #9437](https://phpexcel.codeplex.com/workitem/9437)
+- Occasional notices with PHPExcel_Reader_Excel5 when Excel file contains drawing elements - @Erik Tilt [CodePlex #9452](https://phpexcel.codeplex.com/workitem/9452)
+- PHPExcel_Reader_Excel5 fails as a whole when workbook contains images other than JPEG/PNG - @Erik Tilt [CodePlex #9453](https://phpexcel.codeplex.com/workitem/9453)
+- Excel5 writer checks for iconv but does not necessarily use it - @Erik Tilt [CodePlex #9444](https://phpexcel.codeplex.com/workitem/9444)
+- Altering a style on copied worksheet alters also the original - @Erik Tilt [CodePlex #9463](https://phpexcel.codeplex.com/workitem/9463)
+- Formulas are incorrectly updated when a sheet is renamed - @MarkBaker [CodePlex #9480](https://phpexcel.codeplex.com/workitem/9480)
+- PHPExcel_Worksheet::extractSheetTitle not treating single quotes correctly - @MarkBaker [CodePlex #9513](https://phpexcel.codeplex.com/workitem/9513)
+- PHP Warning raised in function array_key_exists - @MarkBaker [CodePlex #9477](https://phpexcel.codeplex.com/workitem/9477)
+- getAlignWithMargins() gives wrong value when using PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #9599](https://phpexcel.codeplex.com/workitem/9599)
+- getScaleWithDocument() gives wrong value when using PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #9600](https://phpexcel.codeplex.com/workitem/9600)
+- PHPExcel_Reader_Excel2007 not reading the first user-defined number format - @MarkBaker [CodePlex #9630](https://phpexcel.codeplex.com/workitem/9630)
+- Print area converted to uppercase after read with PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #9647](https://phpexcel.codeplex.com/workitem/9647)
+- Incorrect reading of scope for named range using PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #9661](https://phpexcel.codeplex.com/workitem/9661)
+- Error with pattern (getFillType) and rbg (getRGB) - @MarkBaker [CodePlex #9690](https://phpexcel.codeplex.com/workitem/9690)
+- AdvancedValueBinder affected by system timezone setting when inserting date values - @Erik Tilt [CodePlex #9712](https://phpexcel.codeplex.com/workitem/9712)
+- PHPExcel_Reader_Excel2007 not reading value of active sheet index - @Erik Tilt [CodePlex #9743](https://phpexcel.codeplex.com/workitem/9743)
+- getARGB() sometimes returns SimpleXMLElement object instead of string with PHPExcel_Reader_Excel2007 - @Erik Tilt [CodePlex #9742](https://phpexcel.codeplex.com/workitem/9742)
+- Negative image offset causes defects in 14excel5.xls and 20readexcel5.xlsx - @Erik Tilt [CodePlex #9731](https://phpexcel.codeplex.com/workitem/9731)
+- HTML & PDF Writer not working with mergeCells (regression since 1.6.5) - @Erik Tilt [CodePlex #9758](https://phpexcel.codeplex.com/workitem/9758)
+- Too wide columns with HTML and PDF writer - @Erik Tilt [CodePlex #9774](https://phpexcel.codeplex.com/workitem/9774)
+- PDF and cyrillic fonts - @MarkBaker [CodePlex #9775](https://phpexcel.codeplex.com/workitem/9775)
+- Percentages not working correctly with HTML and PDF writers (shows 0.25% instead of 25%) - @Erik Tilt [CodePlex #9793](https://phpexcel.codeplex.com/workitem/9793)
+- PHPExcel_Writer_HTML creates extra borders around cell contents using setUseInlineCss(true) - @Erik Tilt [CodePlex #9791](https://phpexcel.codeplex.com/workitem/9791)
+- Problem with text wrap + merged cells in HTML and PDF writer - @Erik Tilt [CodePlex #9784](https://phpexcel.codeplex.com/workitem/9784)
+- Adjacent path separators in include_path causing IOFactory to violate open_basedir restriction - @Erik Tilt [CodePlex #9814](https://phpexcel.codeplex.com/workitem/9814)
+
+## [1.6.6] - 2009-03-02
+
+### General
+
+- Improve support for built-in number formats in PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #9102](https://phpexcel.codeplex.com/workitem/9102)
+- Source files are in both UNIX and DOS formats - changed to UNIX - @Erik Tilt [CodePlex #9281](https://phpexcel.codeplex.com/workitem/9281)
+
+### Features
+
+- Update documentation: Which language to write formulas in? - @MarkBaker [CodePlex #9338](https://phpexcel.codeplex.com/workitem/9338)
+- Ignore DEFCOLWIDTH records with value 8 in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8817](https://phpexcel.codeplex.com/workitem/8817)
+- Support for width, height, offsetX, offsetY for images in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8847](https://phpexcel.codeplex.com/workitem/8847)
+- Disk Caching in specific folder - @MarkBaker [CodePlex #8870](https://phpexcel.codeplex.com/workitem/8870)
+- Added SUMX2MY2, SUMX2PY2, SUMXMY2, MDETERM and MINVERSE Mathematical and Trigonometric Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added CONVERT Engineering Function - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added DB, DDB, DISC, DOLLARDE, DOLLARFR, INTRATE, IPMT, PPMT, PRICEDISC, PRICEMAT and RECEIVED Financial Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added ACCRINTM, CUMIPMT, CUMPRINC, TBILLEQ, TBILLPRICE, TBILLYIELD, YIELDDISC and YIELDMAT Financial Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added DOLLAR Text Function - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added CORREL, COVAR, FORECAST, INTERCEPT, RSQ, SLOPE and STEYX Statistical Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added PEARSON Statistical Functions as a synonym for CORREL - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added LINEST, LOGEST (currently only valid for stats = false), TREND and GROWTH Statistical Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added RANK and PERCENTRANK Statistical Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Added ROMAN Mathematical Function (Classic form only) - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Update documentation to show example of getCellByColumnAndRow($col, $row) - @MarkBaker [CodePlex #8931](https://phpexcel.codeplex.com/workitem/8931)
+- Implement worksheet, row and cell iterators - @MarkBaker [CodePlex #8770](https://phpexcel.codeplex.com/workitem/8770)
+- Support for arbitrary defined names (named range) - @MarkBaker [CodePlex #9001](https://phpexcel.codeplex.com/workitem/9001)
+- Update formulas when sheet title / named range title changes - @MB, ET [CodePlex #9016](https://phpexcel.codeplex.com/workitem/9016)
+- Ability to read cached calculated value - @MarkBaker [CodePlex #9103](https://phpexcel.codeplex.com/workitem/9103)
+- Support for Excel 1904 calendar date mode (Mac) - @MBaker, ET [CodePlex #8483](https://phpexcel.codeplex.com/workitem/8483)
+- PHPExcel_Writer_Excel5 improvements writing shared strings table - @Erik Tilt [CodePlex #9194](https://phpexcel.codeplex.com/workitem/9194)
+- PHPExcel_Writer_Excel5 iconv fallback when mbstring extension is not enabled - @Erik Tilt [CodePlex #9248](https://phpexcel.codeplex.com/workitem/9248)
+- UTF-8 support in font names in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #9253](https://phpexcel.codeplex.com/workitem/9253)
+- Implement value binding architecture - @MarkBaker [CodePlex #9215](https://phpexcel.codeplex.com/workitem/9215)
+- PDF writer not working with UTF-8 - @MarkBaker [CodePlex #6742](https://phpexcel.codeplex.com/workitem/6742)
+
+### Bugfixes
+
+- Eliminate duplicate style entries in multisheet workbook written by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #9355](https://phpexcel.codeplex.com/workitem/9355)
+- Redirect to client browser fails due to trailing white space in class definitions - @Erik Tilt [CodePlex #8810](https://phpexcel.codeplex.com/workitem/8810)
+- Spurious column dimension element introduced in blank worksheet after using PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #8816](https://phpexcel.codeplex.com/workitem/8816)
+- Image gets slightly narrower than expected when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8830](https://phpexcel.codeplex.com/workitem/8830)
+- Image laid over non-visible row gets squeezed in height when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8831](https://phpexcel.codeplex.com/workitem/8831)
+- PHPExcel_Reader_Excel5 fails when there are 10 or more images in the workbook - @Erik Tilt [CodePlex #8860](https://phpexcel.codeplex.com/workitem/8860)
+- Different header/footer images in different sheets not working with PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #8909](https://phpexcel.codeplex.com/workitem/8909)
+- Fractional seconds disappear when using PHPExcel_Reader_Excel2007 and PHPExcel_Reader_Excel5 - @MB, ET [CodePlex #8924](https://phpexcel.codeplex.com/workitem/8924)
+- Images not showing in OpenOffice when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7994](https://phpexcel.codeplex.com/workitem/7994)
+- Images not showing on print using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #9047](https://phpexcel.codeplex.com/workitem/9047)
+- PHPExcel_Writer_Excel5 maximum allowed record size 4 bytes too short - @Erik Tilt [CodePlex #9085](https://phpexcel.codeplex.com/workitem/9085)
+- Not numeric strings are formatted as dates and numbers using worksheet's toArray method - @MarkBaker [CodePlex #9119](https://phpexcel.codeplex.com/workitem/9119)
+- Excel5 simple formula parsing error - @Erik Tilt [CodePlex #9132](https://phpexcel.codeplex.com/workitem/9132)
+- Problems writing dates with CSV - @Erik Tilt [CodePlex #9206](https://phpexcel.codeplex.com/workitem/9206)
+- PHPExcel_Reader_Excel5 reader fails with fatal error when reading group shapes - @Erik Tilt [CodePlex #9203](https://phpexcel.codeplex.com/workitem/9203)
+- PHPExcel_Writer_Excel5 fails completely when workbook contains more than 57 colors - @Erik Tilt [CodePlex #9231](https://phpexcel.codeplex.com/workitem/9231)
+- PHPExcel_Writer_PDF not compatible with autoload - @Erik Tilt [CodePlex #9244](https://phpexcel.codeplex.com/workitem/9244)
+- Fatal error: Call to a member function getNestingLevel() on a non-object in PHPExcel/Reader/Excel5.php on line 690 - @Erik Tilt [CodePlex #9250](https://phpexcel.codeplex.com/workitem/9250)
+- Notices when running test 04printing.php on PHP 5.2.8 - @MarkBaker [CodePlex #9246](https://phpexcel.codeplex.com/workitem/9246)
+- insertColumn() spawns creation of spurious RowDimension - @MarkBaker [CodePlex #9294](https://phpexcel.codeplex.com/workitem/9294)
+- Fix declarations for methods in extended Trend classes - @MarkBaker [CodePlex #9296](https://phpexcel.codeplex.com/workitem/9296)
+- Fix to parameters for the FORECAST Statistical Function - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- PDF writer problems with cell height and text wrapping - @MarkBaker [CodePlex #7083](https://phpexcel.codeplex.com/workitem/7083)
+- Fix test for calculated value in case the returned result is an array - @MarkBaker
+- Column greater than 256 results in corrupt Excel file using PHPExcel_Writer_Excel5 - @Erik Tilt
+- Excel Numberformat 0.00 results in non internal decimal places values in toArray() Method - @MarkBaker [CodePlex #9351](https://phpexcel.codeplex.com/workitem/9351)
+- setAutoSize not taking into account text rotation - @MB,ET [CodePlex #9356](https://phpexcel.codeplex.com/workitem/9356)
+- Call to undefined method PHPExcel_Worksheet_MemoryDrawing::getPath() in PHPExcel/Writer/HTML.php - @Erik Tilt [CodePlex #9372](https://phpexcel.codeplex.com/workitem/9372)
+
+## [1.6.5] - 2009-01-05
+
+### General
+
+- Applied patch 2063 - @MarkBaker
+- Optimise Shared Strings - @MarkBaker
+- Optimise Cell Sorting - @MarkBaker
+- Optimise Style Hashing - @MarkBaker
+- UTF-8 enhancements - @Erik Tilt
+- PHPExcel_Writer_HTML validation errors against strict HTML 4.01 / CSS 2.1 - @Erik Tilt
+- Documented work items 6203 and 8110 in manual - @MarkBaker
+- Restructure package hierachy so classes can be found more easily in auto-generated API (from work item 8468) - @Erik Tilt
+
+### Features
+
+- Redirect output to a client's browser: Update recommendation in documentation - @MarkBaker [CodePlex #8806](https://phpexcel.codeplex.com/workitem/8806)
+- PHPExcel_Reader_Excel5 support for print gridlines - @Erik Tilt [CodePlex #7897](https://phpexcel.codeplex.com/workitem/7897)
+- Screen gridlines support in Excel5 reader/writer - @Erik Tilt [CodePlex #7899](https://phpexcel.codeplex.com/workitem/7899)
+- Option for adding image to spreadsheet from image resource in memory - @MB, ET [CodePlex #7552](https://phpexcel.codeplex.com/workitem/7552)
+- PHPExcel_Reader_Excel5 style support for BIFF5 files (Excel 5.0 - Excel 95) - @Erik Tilt [CodePlex #7862](https://phpexcel.codeplex.com/workitem/7862)
+- PHPExcel_Reader_Excel5 support for user-defined colors and special built-in colors - @Erik Tilt [CodePlex #7918](https://phpexcel.codeplex.com/workitem/7918)
+- Support for freeze panes in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7992](https://phpexcel.codeplex.com/workitem/7992)
+- Support for header and footer margins in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7996](https://phpexcel.codeplex.com/workitem/7996)
+- Support for active sheet index in Excel5 reader/writer - @Erik Tilt [CodePlex #7997](https://phpexcel.codeplex.com/workitem/7997)
+- Freeze panes not read by PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #7991](https://phpexcel.codeplex.com/workitem/7991)
+- Support for screen zoom level (feature request) - @MB, ET [CodePlex #7993](https://phpexcel.codeplex.com/workitem/7993)
+- Support for default style in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8012](https://phpexcel.codeplex.com/workitem/8012)
+- Apple iWork / Numbers.app incompatibility - @MarkBaker [CodePlex #8094](https://phpexcel.codeplex.com/workitem/8094)
+- Support "between rule" in conditional formatting - @MarkBaker [CodePlex #7931](https://phpexcel.codeplex.com/workitem/7931)
+- Comment size, width and height control (feature request) - @MarkBaker [CodePlex #8308](https://phpexcel.codeplex.com/workitem/8308)
+- Improve method for storing MERGEDCELLS records in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8418](https://phpexcel.codeplex.com/workitem/8418)
+- Support for protectCells() in Excel5 reader/writer - @Erik Tilt [CodePlex #8435](https://phpexcel.codeplex.com/workitem/8435)
+- Support for fitToWidth and fitToHeight pagesetup properties in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8472](https://phpexcel.codeplex.com/workitem/8472)
+- Support for setShowSummaryBelow() and setShowSummaryRight() in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8489](https://phpexcel.codeplex.com/workitem/8489)
+- Support for Excel 1904 calendar date mode (Mac) - @MarkBaker [CodePlex #8483](https://phpexcel.codeplex.com/workitem/8483)
+- Excel5 reader: Support for reading images (bitmaps) - @Erik Tilt [CodePlex #7538](https://phpexcel.codeplex.com/workitem/7538)
+- Support for default style in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8787](https://phpexcel.codeplex.com/workitem/8787)
+- Modified calculate() method to return either an array or the first value from the array for those functions that return arrays rather than single values (e.g the MMULT and TRANSPOSE function). This performance can be modified based on the $returnArrayAsType which can be set/retrieved by calling the setArrayReturnType() and getArrayReturnType() methods of the PHPExcel_Calculation class. - @MarkBaker
+
+### Bugfixes
+
+- Added ERROR.TYPE Information Function, MMULT Mathematical and Trigonometry Function, and TRANSPOSE Lookup and Reference Function - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- setPrintGridlines(true) not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7896](https://phpexcel.codeplex.com/workitem/7896)
+- Incorrect mapping of fill patterns in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7907](https://phpexcel.codeplex.com/workitem/7907)
+- setShowGridlines(false) not working with PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #7898](https://phpexcel.codeplex.com/workitem/7898)
+- getShowGridlines() gives inverted value when reading sheet with PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #7905](https://phpexcel.codeplex.com/workitem/7905)
+- User-defined column width becomes slightly larger after read/write with Excel5 - @Erik Tilt [CodePlex #7944](https://phpexcel.codeplex.com/workitem/7944)
+- Incomplete border style support in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7949](https://phpexcel.codeplex.com/workitem/7949)
+- Conditional formatting "containsText" read/write results in MS Office Excel 2007 crash - @MarkBaker [CodePlex #7928](https://phpexcel.codeplex.com/workitem/7928)
+- All sheets are always selected in output when using PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #7995](https://phpexcel.codeplex.com/workitem/7995)
+- COLUMN function warning message during plain read/write - @MarkBaker [CodePlex #8013](https://phpexcel.codeplex.com/workitem/8013)
+- setValue(0) results in string data type '0' - @MarkBaker [CodePlex #8155](https://phpexcel.codeplex.com/workitem/8155)
+- Styles not removed when removing rows from sheet - @MarkBaker [CodePlex #8226](https://phpexcel.codeplex.com/workitem/8226)
+- =IF formula causes fatal error during $objWriter->save() in Excel2007 format - @MarkBaker [CodePlex #8301](https://phpexcel.codeplex.com/workitem/8301)
+- Exception thrown reading valid xls file: "Excel file is corrupt. Didn't find CONTINUE record while reading shared strings" - @Erik Tilt [CodePlex #8333](https://phpexcel.codeplex.com/workitem/8333)
+- MS Outlook corrupts files generated by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8320](https://phpexcel.codeplex.com/workitem/8320)
+- Undefined method PHPExcel_Worksheet::setFreezePane() in ReferenceHelper.php on line 271 - @MarkBaker [CodePlex #8351](https://phpexcel.codeplex.com/workitem/8351)
+- Ampersands (&), left and right angles (<, >) in Rich-Text strings leads to corrupt output using PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #8401](https://phpexcel.codeplex.com/workitem/8401)
+- Print header and footer not supporting UTF-8 in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8408](https://phpexcel.codeplex.com/workitem/8408)
+- Vertical page breaks not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8463](https://phpexcel.codeplex.com/workitem/8463)
+- Missing support for accounting underline types in PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8476](https://phpexcel.codeplex.com/workitem/8476)
+- Infinite loops when reading corrupt xls file using PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8482](https://phpexcel.codeplex.com/workitem/8482)
+- Sheet protection password not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8566](https://phpexcel.codeplex.com/workitem/8566)
+- PHPExcel_Style_NumberFormat::FORMAT_NUMBER ignored by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8596](https://phpexcel.codeplex.com/workitem/8596)
+- PHPExcel_Reader_Excel5 fails a whole when workbook contains a chart - @Erik Tilt [CodePlex #8781](https://phpexcel.codeplex.com/workitem/8781)
+- Occasional loss of column widths using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #8788](https://phpexcel.codeplex.com/workitem/8788)
+- Notices while reading formulas with deleted sheet references using PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #8795](https://phpexcel.codeplex.com/workitem/8795)
+- Default style not read by PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #8807](https://phpexcel.codeplex.com/workitem/8807)
+- Blank rows occupy too much space in file generated by PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #9341](https://phpexcel.codeplex.com/workitem/9341)
+
+## [1.6.4] - 2008-10-27
+
+### Features
+
+- RK record number error in MS developer documentation: 0x007E should be 0x027E - @Erik Tilt [CodePlex #7882](https://phpexcel.codeplex.com/workitem/7882)
+- getHighestColumn() returning "@" for blank worksheet causes corrupt output - @MarkBaker [CodePlex #7878](https://phpexcel.codeplex.com/workitem/7878)
+- Implement ROW and COLUMN Lookup/Reference Functions (when specified with a parameter) - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement initial work on OFFSET Lookup/Reference Function (returning address rather than value at address) - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Excel5 reader: Page margins - @Erik Tilt [CodePlex #7416](https://phpexcel.codeplex.com/workitem/7416)
+- Excel5 reader: Header & Footer - @Erik Tilt [CodePlex #7417](https://phpexcel.codeplex.com/workitem/7417)
+- Excel5 reader support for page setup (paper size etc.) - @Erik Tilt [CodePlex #7449](https://phpexcel.codeplex.com/workitem/7449)
+- Improve speed and memory consumption of PHPExcel_Writer_CSV - @MarkBaker [CodePlex #7445](https://phpexcel.codeplex.com/workitem/7445)
+- Better recognition of number format in HTML, CSV, and PDF writer - @MarkBaker [CodePlex #7432](https://phpexcel.codeplex.com/workitem/7432)
+- Font support: Superscript and Subscript - @MarkBaker [CodePlex #7485](https://phpexcel.codeplex.com/workitem/7485)
+- Excel5 reader font support: Super- and subscript - @Erik Tilt [CodePlex #7509](https://phpexcel.codeplex.com/workitem/7509)
+- Excel5 reader style support: Text rotation and stacked text - @Erik Tilt [CodePlex #7521](https://phpexcel.codeplex.com/workitem/7521)
+- Excel5 reader: Support for hyperlinks - @Erik Tilt [CodePlex #7530](https://phpexcel.codeplex.com/workitem/7530)
+- Import sheet by request - @MB, ET [CodePlex #7557](https://phpexcel.codeplex.com/workitem/7557)
+- PHPExcel_Reader_Excel5 support for page breaks - @Erik Tilt [CodePlex #7607](https://phpexcel.codeplex.com/workitem/7607)
+- PHPExcel_Reader_Excel5 support for shrink-to-fit - @Erik Tilt [CodePlex #7622](https://phpexcel.codeplex.com/workitem/7622)
+- Support for error types - @MB, ET [CodePlex #7675](https://phpexcel.codeplex.com/workitem/7675)
+- Excel5 reader true formula support - @Erik Tilt [CodePlex #7388](https://phpexcel.codeplex.com/workitem/7388)
+- Support for named ranges (defined names) in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7701](https://phpexcel.codeplex.com/workitem/7701)
+- Support for repeating rows and repeating columns (print titles) in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7781](https://phpexcel.codeplex.com/workitem/7781)
+- Support for print area in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7783](https://phpexcel.codeplex.com/workitem/7783)
+- Excel5 reader and writer support for horizontal and vertical centering of page - @Erik Tilt [CodePlex #7795](https://phpexcel.codeplex.com/workitem/7795)
+- Applied patch 1962 - @MarkBaker
+- Excel5 reader and writer support for hidden cells (formulas) - @Erik Tilt [CodePlex #7866](https://phpexcel.codeplex.com/workitem/7866)
+- Support for indentation in cells (feature request) - @MB, ET [CodePlex #7612](https://phpexcel.codeplex.com/workitem/7612)
+
+### Bugfixes
+
+- Option for reading only specified interval of rows in a sheet - @MB, ET [CodePlex #7828](https://phpexcel.codeplex.com/workitem/7828)
+- PHPExcel_Calculation_Functions::DATETIMENOW() and PHPExcel_Calculation_Functions::DATENOW() to force UTC - @MarkBaker [CodePlex #7367](https://phpexcel.codeplex.com/workitem/7367)
+- Modified PHPExcel_Shared_Date::FormattedPHPToExcel() and PHPExcel_Shared_Date::ExcelToPHP to force datatype for return values - @MarkBaker [CodePlex #7395](https://phpexcel.codeplex.com/workitem/7395)
+- Excel5 reader not producing UTF-8 strings with BIFF5 files - @Erik Tilt [CodePlex #7450](https://phpexcel.codeplex.com/workitem/7450)
+- Array constant in formula gives run-time notice with Excel2007 writer - @MarkBaker [CodePlex #7470](https://phpexcel.codeplex.com/workitem/7470)
+- PHPExcel_Reader_Excel2007 setReadDataOnly(true) returns Rich-Text - @MarkBaker [CodePlex #7494](https://phpexcel.codeplex.com/workitem/7494)
+- PHPExcel_Reader_Excel5 setReadDataOnly(true) returns Rich-Text - @Erik Tilt [CodePlex #7496](https://phpexcel.codeplex.com/workitem/7496)
+- Characters before superscript or subscript losing style - @MarkBaker [CodePlex #7497](https://phpexcel.codeplex.com/workitem/7497)
+- Subscript not working with HTML writer - @MarkBaker [CodePlex #7507](https://phpexcel.codeplex.com/workitem/7507)
+- DefaultColumnDimension not working on first column (A) - @MarkBaker [CodePlex #7508](https://phpexcel.codeplex.com/workitem/7508)
+- Negative numbers are stored as text in PHPExcel_Writer_2007 - @MarkBaker [CodePlex #7527](https://phpexcel.codeplex.com/workitem/7527)
+- Text rotation and stacked text not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7531](https://phpexcel.codeplex.com/workitem/7531)
+- PHPExcel_Shared_Date::isDateTimeFormatCode erroneously says true - @MarkBaker [CodePlex #7536](https://phpexcel.codeplex.com/workitem/7536)
+- Different images with same filename in separate directories become duplicates - @MarkBaker [CodePlex #7559](https://phpexcel.codeplex.com/workitem/7559)
+- PHPExcel_Reader_Excel5 not returning sheet names as UTF-8 using for Excel 95 files - @Erik Tilt [CodePlex #7568](https://phpexcel.codeplex.com/workitem/7568)
+- setAutoSize(true) on empty column gives column width of 10 using PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #7575](https://phpexcel.codeplex.com/workitem/7575)
+- setAutoSize(true) on empty column gives column width of 255 using PHPExcel_Writer_Excel5 - @MB, ET [CodePlex #7573](https://phpexcel.codeplex.com/workitem/7573)
+- Worksheet_Drawing bug - @MarkBaker [CodePlex #7514](https://phpexcel.codeplex.com/workitem/7514)
+- getCalculatedValue() with REPT function causes script to stop - @MarkBaker [CodePlex #7593](https://phpexcel.codeplex.com/workitem/7593)
+- getCalculatedValue() with LEN function causes script to stop - @MarkBaker [CodePlex #7594](https://phpexcel.codeplex.com/workitem/7594)
+- Explicit fit-to-width (page setup) results in fit-to-height becoming 1 - @MarkBaker [CodePlex #7600](https://phpexcel.codeplex.com/workitem/7600)
+- Fit-to-width value of 1 is lost after read/write of Excel2007 spreadsheet - @MarkBaker [CodePlex #7610](https://phpexcel.codeplex.com/workitem/7610)
+- Conditional styles not read properly using PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #7516](https://phpexcel.codeplex.com/workitem/7516)
+- PHPExcel_Writer_2007: Default worksheet style works only for first sheet - @MarkBaker [CodePlex #7611](https://phpexcel.codeplex.com/workitem/7611)
+- Cannot Lock Cells using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #6940](https://phpexcel.codeplex.com/workitem/6940)
+- Incorrect cell protection values found when using Excel5 reader - @Erik Tilt [CodePlex #7621](https://phpexcel.codeplex.com/workitem/7621)
+- Default row height not working above highest row using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7623](https://phpexcel.codeplex.com/workitem/7623)
+- Default column width does not get applied when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7637](https://phpexcel.codeplex.com/workitem/7637)
+- Broken support for UTF-8 string formula results in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7642](https://phpexcel.codeplex.com/workitem/7642)
+- UTF-8 sheet names not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7643](https://phpexcel.codeplex.com/workitem/7643)
+- getCalculatedValue() with ISNONTEXT function causes script to stop - @MarkBaker [CodePlex #7631](https://phpexcel.codeplex.com/workitem/7631)
+- Missing BIFF3 functions in PHPExcel_Writer_Excel5: USDOLLAR (YEN), FINDB, SEARCHB, REPLACEB, LEFTB, RIGHTB, MIDB, LENB, ASC, DBCS (JIS) - @Erik Tilt [CodePlex #7652](https://phpexcel.codeplex.com/workitem/7652)
+- Excel5 reader doesn't read numbers correctly in 64-bit systems - @Erik Tilt [CodePlex #7663](https://phpexcel.codeplex.com/workitem/7663)
+- Missing BIFF5 functions in PHPExcel_Writer_Excel5: ISPMT, DATEDIF, DATESTRING, NUMBERSTRING - @Erik Tilt [CodePlex #7667](https://phpexcel.codeplex.com/workitem/7667)
+- Missing BIFF8 functions in PHPExcel_Writer_Excel5: GETPIVOTDATA, HYPERLINK, PHONETIC, AVERAGEA, MAXA, MINA, STDEVPA, VARPA, STDEVA, VARA - @Erik Tilt [CodePlex #7668](https://phpexcel.codeplex.com/workitem/7668)
+- Wrong host value in PHPExcel_Shared_ZipStreamWrapper::stream_open() - @MarkBaker [CodePlex #7657](https://phpexcel.codeplex.com/workitem/7657)
+- PHPExcel_Reader_Excel5 not reading explicitly entered error types in cells - @Erik Tilt [CodePlex #7676](https://phpexcel.codeplex.com/workitem/7676)
+- Boolean and error data types not preserved for formula results in PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7678](https://phpexcel.codeplex.com/workitem/7678)
+- PHPExcel_Reader_Excel2007 ignores cell data type - @MarkBaker [CodePlex #7695](https://phpexcel.codeplex.com/workitem/7695)
+- PHPExcel_Reader_Excel5 ignores cell data type - @Erik Tilt [CodePlex #7712](https://phpexcel.codeplex.com/workitem/7712)
+- PHPExcel_Writer_Excel5 not aware of data type - @Erik Tilt [CodePlex #7587](https://phpexcel.codeplex.com/workitem/7587)
+- Long strings sometimes truncated when using PHPExcel_Reader_Excel5 - @Erik Tilt [CodePlex #7713](https://phpexcel.codeplex.com/workitem/7713)
+- Direct entry of boolean or error type in cell not supported by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7727](https://phpexcel.codeplex.com/workitem/7727)
+- PHPExcel_Reader_Excel2007: Error reading cell with data type string, date number format, and numeric-like cell value - @MarkBaker [CodePlex #7714](https://phpexcel.codeplex.com/workitem/7714)
+- Row and column outlines (group indent level) not showing after using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7735](https://phpexcel.codeplex.com/workitem/7735)
+- Missing UTF-8 support in number format codes for PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7737](https://phpexcel.codeplex.com/workitem/7737)
+- Missing UTF-8 support with PHPExcel_Writer_Excel5 for explicit string in formula - @Erik Tilt [CodePlex #7750](https://phpexcel.codeplex.com/workitem/7750)
+- Problem with class constants in PHPExcel_Style_NumberFormat - @MarkBaker [CodePlex #7726](https://phpexcel.codeplex.com/workitem/7726)
+- Sometimes errors with PHPExcel_Reader_Excel5 reading hyperlinks - @Erik Tilt [CodePlex #7758](https://phpexcel.codeplex.com/workitem/7758)
+- Hyperlink in cell always results in string data type when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7759](https://phpexcel.codeplex.com/workitem/7759)
+- Excel file with blank sheet seen as broken in MS Office Excel 2007 when created by PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7771](https://phpexcel.codeplex.com/workitem/7771)
+- PHPExcel_Reader_Excel5: Incorrect reading of formula with explicit string containing (escaped) double-quote - @Erik Tilt [CodePlex #7785](https://phpexcel.codeplex.com/workitem/7785)
+- getCalculatedValue() fails on formula with sheet name containing (escaped) single-quote - @MarkBaker [CodePlex #7787](https://phpexcel.codeplex.com/workitem/7787)
+- getCalculatedValue() fails on formula with explicit string containing (escaped) double-quote - @MarkBaker [CodePlex #7786](https://phpexcel.codeplex.com/workitem/7786)
+- Problems with simultaneous repeatRowsAtTop and repeatColumnsAtLeft using Excel2007 reader and writer - @MarkBaker [CodePlex #7780](https://phpexcel.codeplex.com/workitem/7780)
+- PHPExcel_Reader_Excel5: Error reading formulas with sheet reference containing special characters - @Erik Tilt [CodePlex #7802](https://phpexcel.codeplex.com/workitem/7802)
+- Off-sheet references sheet!A1 not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7831](https://phpexcel.codeplex.com/workitem/7831)
+- Repeating rows/columns (print titles), print area not working with PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7834](https://phpexcel.codeplex.com/workitem/7834)
+- Formula having datetime number format shows as text when using PHPExcel_Writer_Excel5 - @Erik Tilt [CodePlex #7849](https://phpexcel.codeplex.com/workitem/7849)
+- Cannot set formula to hidden using applyFromArray() - @MarkBaker [CodePlex #7863](https://phpexcel.codeplex.com/workitem/7863)
+- HTML/PDF Writers limited to 26 columns by calculateWorksheetDimension (erroneous comparison in getHighestColumn() method) - @MarkBaker [CodePlex #7805](https://phpexcel.codeplex.com/workitem/7805)
+- Formula returning error type is lost when read by PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #7873](https://phpexcel.codeplex.com/workitem/7873)
+- PHPExcel_Reader_Excel5: Cell style lost for last column in group of blank cells - @Erik Tilt [CodePlex #7883](https://phpexcel.codeplex.com/workitem/7883)
+- Column width sometimes collapses to auto size using Excel2007 reader/writer - @MarkBaker [CodePlex #7886](https://phpexcel.codeplex.com/workitem/7886)
+- Data Validation Formula = 0 crashes Excel - @MarkBaker [CodePlex #9343](https://phpexcel.codeplex.com/workitem/9343)
+
+## [1.6.3] - 2008-08-25
+
+### General
+
+- Modified PHPExcel_Shared_Date::PHPToExcel() to force UTC - @MarkBaker [CodePlex #7367](https://phpexcel.codeplex.com/workitem/7367)
+- Applied patch 1629 - @MarkBaker
+- Applied patch 1644 - @MarkBaker
+- Implement repeatRow and repeatColumn in Excel5 writer - @MarkBaker [CodePlex #6485](https://phpexcel.codeplex.com/workitem/6485)
+
+### Features
+
+- Remove scene3d filter in Excel2007 drawing - @MarkBaker [CodePlex #6838](https://phpexcel.codeplex.com/workitem/6838)
+- Implement CHOOSE and INDEX Lookup/Reference Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement CLEAN Text Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement YEARFRAC Date/Time Functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement 2 options for print/show gridlines - @MarkBaker [CodePlex #6508](https://phpexcel.codeplex.com/workitem/6508)
+- Add VLOOKUP function (contribution) - @MarkBaker [CodePlex #7270](https://phpexcel.codeplex.com/workitem/7270)
+- Implemented: ShrinkToFit - @MarkBaker [CodePlex #7182](https://phpexcel.codeplex.com/workitem/7182)
+- Row heights not updated correctly when inserting new rows - @MarkBaker [CodePlex #7218](https://phpexcel.codeplex.com/workitem/7218)
+- Copy worksheets within the same workbook - @MarkBaker [CodePlex #7157](https://phpexcel.codeplex.com/workitem/7157)
+- Excel5 reader style support: horizontal and vertical alignment plus text wrap - @Erik Tilt [CodePlex #7290](https://phpexcel.codeplex.com/workitem/7290)
+- Excel5 reader support for merged cells - @Erik Tilt [CodePlex #7294](https://phpexcel.codeplex.com/workitem/7294)
+- Excel5 reader: Sheet Protection - @Erik Tilt [CodePlex #7296](https://phpexcel.codeplex.com/workitem/7296)
+- Excel5 reader: Password for sheet protection - @Erik Tilt [CodePlex #7297](https://phpexcel.codeplex.com/workitem/7297)
+- Excel5 reader: Column width - @Erik Tilt [CodePlex #7299](https://phpexcel.codeplex.com/workitem/7299)
+- Excel5 reader: Row height - @Erik Tilt [CodePlex #7301](https://phpexcel.codeplex.com/workitem/7301)
+- Excel5 reader: Font support - @Erik Tilt [CodePlex #7304](https://phpexcel.codeplex.com/workitem/7304)
+- Excel5 reader: support for locked cells - @Erik Tilt [CodePlex #7324](https://phpexcel.codeplex.com/workitem/7324)
+- Excel5 reader style support: Fill (background colors and patterns) - @Erik Tilt [CodePlex #7330](https://phpexcel.codeplex.com/workitem/7330)
+- Excel5 reader style support: Borders (style and color) - @Erik Tilt [CodePlex #7332](https://phpexcel.codeplex.com/workitem/7332)
+- Excel5 reader: Rich-Text support - @Erik Tilt [CodePlex #7346](https://phpexcel.codeplex.com/workitem/7346)
+- Read Excel built-in number formats with Excel 2007 reader - @MarkBaker [CodePlex #7313](https://phpexcel.codeplex.com/workitem/7313)
+- Excel5 reader: Number format support - @Erik Tilt [CodePlex #7317](https://phpexcel.codeplex.com/workitem/7317)
+- Creating a copy of PHPExcel object - @MarkBaker [CodePlex #7362](https://phpexcel.codeplex.com/workitem/7362)
+- Excel5 reader: support for row / column outline (group) - @Erik Tilt [CodePlex #7373](https://phpexcel.codeplex.com/workitem/7373)
+- Implement default row/column sizes - @MarkBaker [CodePlex #7380](https://phpexcel.codeplex.com/workitem/7380)
+- Writer HTML - option to return styles and table separately - @MarkBaker [CodePlex #7364](https://phpexcel.codeplex.com/workitem/7364)
+
+### Bugfixes
+
+- Excel5 reader: Support for remaining built-in number formats - @Erik Tilt [CodePlex #7393](https://phpexcel.codeplex.com/workitem/7393)
+- Fixed rounding in HOUR MINUTE and SECOND Time functions, and improved performance for these - @MarkBaker
+- Fix to TRIM function - @MarkBaker
+- Fixed range validation in TIME Functions.php - @MarkBaker
+- EDATE and EOMONTH functions now return date values based on the returnDateType flag - @MarkBaker
+- Write date values that are the result of a calculation function correctly as Excel serialized dates rather than PHP serialized date values - @MarkBaker
+- Excel2007 reader not always reading boolean correctly - @MarkBaker [CodePlex #6690](https://phpexcel.codeplex.com/workitem/6690)
+- Columns above IZ - @MarkBaker [CodePlex #6275](https://phpexcel.codeplex.com/workitem/6275)
+- Other locale than English causes Excel2007 writer to produce broken xlsx - @MarkBaker [CodePlex #6853](https://phpexcel.codeplex.com/workitem/6853)
+- Typo: Number_fromat in NumberFormat.php - @MarkBaker [CodePlex #7061](https://phpexcel.codeplex.com/workitem/7061)
+- Bug in Worksheet_BaseDrawing setWidth() - @MarkBaker [CodePlex #6865](https://phpexcel.codeplex.com/workitem/6865)
+- PDF writer collapses column width for merged cells - @MarkBaker [CodePlex #6891](https://phpexcel.codeplex.com/workitem/6891)
+- Issues with drawings filenames - @MarkBaker [CodePlex #6867](https://phpexcel.codeplex.com/workitem/6867)
+- fromArray() local variable isn't defined - @MarkBaker [CodePlex #7073](https://phpexcel.codeplex.com/workitem/7073)
+- PHPExcel_Writer_Excel5->setTempDir() not passed to all classes involved in writing to a file - @MarkBaker [CodePlex #7276](https://phpexcel.codeplex.com/workitem/7276)
+- Excel5 reader not handling UTF-8 properly - @MarkBaker [CodePlex #7277](https://phpexcel.codeplex.com/workitem/7277)
+- If you write a 0 value in cell, cell shows as empty - @MarkBaker [CodePlex #7327](https://phpexcel.codeplex.com/workitem/7327)
+- Excel2007 writer: Row height ignored for empty rows - @MarkBaker [CodePlex #7302](https://phpexcel.codeplex.com/workitem/7302)
+- Excel2007 (comments related error) - @MarkBaker [CodePlex #7281](https://phpexcel.codeplex.com/workitem/7281)
+- Column width in other locale - @MarkBaker [CodePlex #7345](https://phpexcel.codeplex.com/workitem/7345)
+- Excel2007 reader not reading underlined Rich-Text - @MarkBaker [CodePlex #7347](https://phpexcel.codeplex.com/workitem/7347)
+- Excel5 reader converting booleans to strings - @Erik Tilt [CodePlex #7357](https://phpexcel.codeplex.com/workitem/7357)
+- Recursive Object Memory Leak - @MarkBaker [CodePlex #7365](https://phpexcel.codeplex.com/workitem/7365)
+- Excel2007 writer ignoring row dimensions without cells - @MarkBaker [CodePlex #7372](https://phpexcel.codeplex.com/workitem/7372)
+- Excel5 reader is converting formatted numbers / dates to strings - @Erik Tilt [CodePlex #7382](https://phpexcel.codeplex.com/workitem/7382)
+
+## [1.6.2] - 2008-06-23
+
+### General
+
+- Document style array values - @MarkBaker [CodePlex #6088](https://phpexcel.codeplex.com/workitem/6088)
+- Applied patch 1195 - @MarkBaker
+- Redirecting output to a client’s web browser - http headers - @MarkBaker [CodePlex #6178](https://phpexcel.codeplex.com/workitem/6178)
+- Improve worksheet garbage collection - @MarkBaker [CodePlex #6187](https://phpexcel.codeplex.com/workitem/6187)
+- Functions that return date values can now be configured to return as Excel serialized date/time, PHP serialized date/time, or a PHP date/time object. - @MarkBaker
+- Functions that explicitly accept dates as parameters now permit values as Excel serialized date/time, PHP serialized date/time, a valid date string, or a PHP date/time object. - @MarkBaker
+- Implement ACOSH, ASINH and ATANH functions for those operating platforms/PHP versions that don't include these functions - @MarkBaker
+- Implement ATAN2 logic reversing the arguments as per Excel - @MarkBaker
+- Additional validation of parameters for COMBIN - @MarkBaker
+
+### Features
+
+- Fixed validation for CEILING and FLOOR when the value and significance parameters have different signs; and allowed default value of 1 or -1 for significance when in GNUMERIC compatibility mode - @MarkBaker
+- Implement ADDRESS, ISLOGICAL, ISTEXT and ISNONTEXT functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement COMPLEX, IMAGINARY, IMREAL, IMARGUMENT, IMCONJUGATE, IMABS, IMSUB, IMDIV, IMSUM, IMPRODUCT, IMSQRT, IMEXP, IMLN, IMLOG10, IMLOG2, IMPOWER IMCOS and IMSIN Engineering functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Implement NETWORKDAYS and WORKDAY Date/Time functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+- Make cell column AAA available - @MarkBaker [CodePlex #6100](https://phpexcel.codeplex.com/workitem/6100)
+- Mark particular cell as selected when opening Excel - @MarkBaker [CodePlex #6095](https://phpexcel.codeplex.com/workitem/6095)
+- Multiple sheets in PDF and HTML - @MarkBaker [CodePlex #6120](https://phpexcel.codeplex.com/workitem/6120)
+- Implement PHPExcel_ReaderFactory and PHPExcel_WriterFactory - @MarkBaker [CodePlex #6227](https://phpexcel.codeplex.com/workitem/6227)
+- Set image root of PHPExcel_Writer_HTML - @MarkBaker [CodePlex #6249](https://phpexcel.codeplex.com/workitem/6249)
+- Enable/disable calculation cache - @MarkBaker [CodePlex #6264](https://phpexcel.codeplex.com/workitem/6264)
+- PDF writer and multi-line text - @MarkBaker [CodePlex #6259](https://phpexcel.codeplex.com/workitem/6259)
+- Feature request - setCacheExpirationTime() - @MarkBaker [CodePlex #6350](https://phpexcel.codeplex.com/workitem/6350)
+- Implement late-binding mechanisms to reduce memory footprint - @JB [CodePlex #6370](https://phpexcel.codeplex.com/workitem/6370)
+- Implement shared styles - @JB [CodePlex #6430](https://phpexcel.codeplex.com/workitem/6430)
+- Copy sheet from external Workbook to active Workbook - @MarkBaker [CodePlex #6391](https://phpexcel.codeplex.com/workitem/6391)
+
+### Bugfixes
+
+- Functions in Conditional Formatting - @MarkBaker [CodePlex #6428](https://phpexcel.codeplex.com/workitem/6428)
+- Default Style in Excel5 - @MarkBaker [CodePlex #6096](https://phpexcel.codeplex.com/workitem/6096)
+- Numbers starting with '+' cause Excel 2007 errors - @MarkBaker [CodePlex #6150](https://phpexcel.codeplex.com/workitem/6150)
+- ExcelWriter5 is not PHP5 compatible, using it with E_STRICT results in a bunch of errors (applied patches) - @MarkBaker [CodePlex #6092](https://phpexcel.codeplex.com/workitem/6092)
+- Error Reader Excel2007 line 653 foreach ($relsDrawing->Relationship as $ele) - @MarkBaker [CodePlex #6179](https://phpexcel.codeplex.com/workitem/6179)
+- Worksheet toArray() screws up DATE - @MarkBaker [CodePlex #6229](https://phpexcel.codeplex.com/workitem/6229)
+- References to a Richtext cell in a formula - @MarkBaker [CodePlex #6253](https://phpexcel.codeplex.com/workitem/6253)
+- insertNewColumnBefore Bug - @MarkBaker [CodePlex #6285](https://phpexcel.codeplex.com/workitem/6285)
+- Error reading Excel2007 file with shapes - @MarkBaker [CodePlex #6319](https://phpexcel.codeplex.com/workitem/6319)
+- Determine whether date values need conversion from PHP dates to Excel dates before writing to file, based on the data type (float or integer) - @MarkBaker [CodePlex #6302](https://phpexcel.codeplex.com/workitem/6302)
+- Fixes to DATE function when it is given negative input parameters - @MarkBaker
+- PHPExcel handles empty cells other than Excel - @MarkBaker [CodePlex #6347](https://phpexcel.codeplex.com/workitem/6347)
+- PHPExcel handles 0 and "" as being the same - @MarkBaker [CodePlex #6348](https://phpexcel.codeplex.com/workitem/6348)
+- Problem Using Excel2007 Reader for Spreadsheets containing images - @MarkBaker [CodePlex #6357](https://phpexcel.codeplex.com/workitem/6357)
+- ShowGridLines ignored when reading/writing Excel 2007 - @MarkBaker [CodePlex #6359](https://phpexcel.codeplex.com/workitem/6359)
+- Bug With Word Wrap in Excel 2007 Reader - @MarkBaker [CodePlex #6426](https://phpexcel.codeplex.com/workitem/6426)
+
+## [1.6.1] - 2008-04-28
+
+### General
+
+- Fix documentation printing - @MarkBaker [CodePlex #5532](https://phpexcel.codeplex.com/workitem/5532)
+- Memory usage improvements - @MarkBaker [CodePlex #5586](https://phpexcel.codeplex.com/workitem/5586)
+- Applied patch 990 - @MarkBaker
+
+### Features
+
+- Applied patch 991 - @MarkBaker
+- Implement PHPExcel_Reader_Excel5 - @BM [CodePlex #2841](https://phpexcel.codeplex.com/workitem/2841)
+- Implement "toArray" and "fromArray" method - @MarkBaker [CodePlex #5564](https://phpexcel.codeplex.com/workitem/5564)
+- Read shared formula - @MarkBaker [CodePlex #5665](https://phpexcel.codeplex.com/workitem/5665)
+- Read image twoCellAnchor - @MarkBaker [CodePlex #5681](https://phpexcel.codeplex.com/workitem/5681)
+- &G Image as bg for headerfooter - @MarkBaker [CodePlex #4446](https://phpexcel.codeplex.com/workitem/4446)
+- Implement page layout functionality for Excel5 format - @MarkBaker [CodePlex #5834](https://phpexcel.codeplex.com/workitem/5834)
+
+### Bugfixes
+
+- Feature request: PHPExcel_Writer_PDF - @MarkBaker [CodePlex #6039](https://phpexcel.codeplex.com/workitem/6039)
+- DefinedNames null check - @MarkBaker [CodePlex #5517](https://phpexcel.codeplex.com/workitem/5517)
+- Hyperlinks should not always have trailing slash - @MarkBaker [CodePlex #5463](https://phpexcel.codeplex.com/workitem/5463)
+- Saving Error - Uncaught exception (#REF! named range) - @MarkBaker [CodePlex #5592](https://phpexcel.codeplex.com/workitem/5592)
+- Error when creating Zip file on Linux System (Not Windows) - @MarkBaker [CodePlex #5634](https://phpexcel.codeplex.com/workitem/5634)
+- Time incorrecly formated - @MarkBaker [CodePlex #5876](https://phpexcel.codeplex.com/workitem/5876)
+- Conditional formatting - second rule not applied - @MarkBaker [CodePlex #5914](https://phpexcel.codeplex.com/workitem/5914)
+- PHPExcel_Reader_Excel2007 cannot load PHPExcel_Shared_File - @MarkBaker [CodePlex #5978](https://phpexcel.codeplex.com/workitem/5978)
+- Output redirection to web browser - @MarkBaker [CodePlex #6020](https://phpexcel.codeplex.com/workitem/6020)
+
+## [1.6.0] - 2008-02-14
+
+### Features
+
+- Use PHPExcel datatypes in formula calculation - @MarkBaker [CodePlex #3156](https://phpexcel.codeplex.com/workitem/3156)
+- Center on page when printing - @MarkBaker [CodePlex #5019](https://phpexcel.codeplex.com/workitem/5019)
+- Hyperlink to other spreadsheet - @MarkBaker [CodePlex #5099](https://phpexcel.codeplex.com/workitem/5099)
+- Set the print area of a worksheet - @MarkBaker [CodePlex #5104](https://phpexcel.codeplex.com/workitem/5104)
+- Read "definedNames" property of worksheet - @MarkBaker [CodePlex #5118](https://phpexcel.codeplex.com/workitem/5118)
+- Set default style for all cells - @MarkBaker [CodePlex #5338](https://phpexcel.codeplex.com/workitem/5338)
+- Named Ranges - @MarkBaker [CodePlex #4216](https://phpexcel.codeplex.com/workitem/4216)
+
+### Bugfixes
+
+- Implement worksheet references (Sheet1!A1) - @MarkBaker [CodePlex #5398](https://phpexcel.codeplex.com/workitem/5398)
+- Redirect output to a client's web browser - @MarkBaker [CodePlex #4967](https://phpexcel.codeplex.com/workitem/4967)
+- "File Error: data may have been lost." seen in Excel 2007 and Excel 2003 SP3 when opening XLS file - @MarkBaker [CodePlex #5008](https://phpexcel.codeplex.com/workitem/5008)
+- Bug in style's getHashCode() - @MarkBaker [CodePlex #5165](https://phpexcel.codeplex.com/workitem/5165)
+- PHPExcel_Reader not correctly reading numeric values - @MarkBaker [CodePlex #5165](https://phpexcel.codeplex.com/workitem/5165)
+- Text rotation is read incorrectly - @MarkBaker [CodePlex #5324](https://phpexcel.codeplex.com/workitem/5324)
+- Enclosure " and data " result a bad data : \" instead of "" - @MarkBaker [CodePlex #5326](https://phpexcel.codeplex.com/workitem/5326)
+- Formula parser - IF statement returning array instead of scalar - @MarkBaker [CodePlex #5332](https://phpexcel.codeplex.com/workitem/5332)
+- setFitToWidth(nbpage) & setFitToWidth(nbpage) work partially - @MarkBaker [CodePlex #5351](https://phpexcel.codeplex.com/workitem/5351)
+- Worksheet::setTitle() causes unwanted renaming - @MarkBaker [CodePlex #5361](https://phpexcel.codeplex.com/workitem/5361)
+- Hyperlinks not working. Results in broken xlsx file. - @MarkBaker [CodePlex #5407](https://phpexcel.codeplex.com/workitem/5407)
+
+## [1.5.5] - 2007-12-24
+
+### General
+
+- Grouping Rows - @MarkBaker [CodePlex #4135](https://phpexcel.codeplex.com/workitem/4135)
+
+### Features
+
+- Semi-nightly builds - @MarkBaker [CodePlex #4427](https://phpexcel.codeplex.com/workitem/4427)
+- Implement "date" datatype - @MarkBaker [CodePlex #3155](https://phpexcel.codeplex.com/workitem/3155)
+- Date format not honored in CSV writer - @MarkBaker [CodePlex #4150](https://phpexcel.codeplex.com/workitem/4150)
+- RichText and sharedStrings - @MarkBaker [CodePlex #4199](https://phpexcel.codeplex.com/workitem/4199)
+- Implement more Excel calculation functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+    - Addition of DATE, DATEDIF, DATEVALUE, DAY, DAYS360- Implement more Excel calculation functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+    - Addition of AVEDEV, HARMEAN and GEOMEAN
+    - Addition of the BINOMDIST (Non-cumulative only), COUNTBLANK, EXPONDIST, FISHER, FISHERINV, NORMDIST, NORMSDIST, PERMUT, POISSON (Non-cumulative only) and STANDARDIZE Statistical Functions
+    - Addition of the CEILING, COMBIN, EVEN, FACT, FACTDOUBLE, FLOOR, MULTINOMIAL, ODD, ROUNDDOWN, ROUNDUP, SIGN, SQRTPI and SUMSQ Mathematical Functions
+    - Addition of the NORMINV, NORMSINV, CONFIDENCE and SKEW Statistical Functions
+    - Addition of the CRITBINOM, HYPGEOMDIST, KURT, LOGINV, LOGNORMDIST, NEGBINOMDIST and WEIBULL Statistical Functions
+    - Addition of the LARGE, PERCENTILE, QUARTILE, SMALL and TRIMMEAN Statistical Functions
+    - Addition of the BIN2HEX, BIN2OCT, DELTA, ERF, ERFC, GESTEP, HEX2BIN, HEX2DEC, HEX2OCT, OCT2BIN and OCT2HEX Engineering Functions
+    - Addition of the CHIDIST, GAMMADIST and GAMMALN Statistical Functions
+    - Addition of the GCD, LCM, MROUND and SUBTOTAL Mathematical Functions
+    - Addition of the LOWER, PROPER and UPPER Text Functions
+    - Addition of the BETADIST and BETAINV Statistical Functions
+    - Addition of the CHIINV and GAMMAINV Statistical Functions
+    - Addition of the SERIESSUM Mathematical Function
+    - Addition of the CHAR, CODE, FIND, LEN, REPT, SEARCH, T, TRIM Text Functions
+    - Addition of the FALSE and TRUE Boolean Functions
+    - Addition of the TDIST and TINV Statistical Functions
+    - Addition of the EDATE, EOMONTH, YEAR, MONTH, TIME, TIMEVALUE, HOUR, MINUTE, SECOND, WEEKDAY, WEEKNUM, NOW, TODAY and Date/Time Function
+    - Addition of the BESSELI, BESSELJ, BESSELK and BESSELY Engineering Functions
+    - Addition of the SLN and SYD Financial Functions
+    - reworked MODE calculation to handle floating point numbers
+    - Improved error trapping for invalid input values
+    - Fix to SMALL, LARGE, PERCENTILE and TRIMMEAN to eliminate non-numeric values
+    - Added CDF to BINOMDIST and POISSON
+    - Fix to a potential endless loop in CRITBINOM, together with other bugfixes to the algorithm
+    - Fix to SQRTPI so that it will work with a real value parameter rather than just integers
+    - Trap for passing negative values to FACT
+    - Improved accuracy of the NORMDIST cumulative function, and of the ERF and ERFC functions
+    - Replicated Excel data-type and error handling for BIN, DEC, OCT and HEX conversion functions
+    - Replicated Excel data-type and error handling for AND and OR Boolean functions
+    - Bugfix to MROUND
+    - Rework of the DATE, DATEVALUE, DAY, DAYS360 and DATEDIF date/Time functions to use Excel dates rather than straight PHP dates
+    - Rework of the AND, OR Boolean functions to ignore string values
+    - Rework of the BIN2DEC, BIN2HEX, BIN2OCT, DEC2BIN, DEC2HEX, DEC2OCT Engineering functions to handle two's complement
+    - Excel, Gnumeric and OpenOffice Calc compatibility flag for functions
+    - Note, not all functions have yet been written to work with the Gnumeric and OpenOffice Calc compatibility flags
+    - 1900 or 1904 Calendar flag for date functions
+    - Reworked ExcelToPHP date method to handle the Excel 1900 leap year
+    - Note that this will not correctly return values prior to 13-Dec-1901 20:45:52 as this is the minimum value that PHP date serial values can handle. If you need to work with dates prior to this, then an ExcelToPHPObject method has been added which will work correctly with values between Excel's 1900 calendar base date of 1-Jan-1900, and 13-Dec-1901
+    - Addition of ExcelToPHPObject date method to return a PHP DateTime object from an Excel date serial value
+    - PHPToExcel method modified to accept either PHP date serial numbers or PHP DateTime objects
+    - Addition of FormattedPHPToExcel which will accept a date and time broken to into year, month, day, hour, minute, second and return an Excel date serial value- Control characters in Excel 2007 - @MarkBaker [CodePlex #4485](https://phpexcel.codeplex.com/workitem/4485)
+- BaseDrawing::setWidthAndHeight method request - @MarkBaker [CodePlex #4796](https://phpexcel.codeplex.com/workitem/4796)
+- Page Setup -> Print Titles -> Sheet -> 'Rows to repeat at top' - @MarkBaker [CodePlex #4798](https://phpexcel.codeplex.com/workitem/4798)
+
+### Bugfixes
+
+- Comment functionality - @MarkBaker [CodePlex #4433](https://phpexcel.codeplex.com/workitem/4433)
+- Undefined variable in PHPExcel_Writer_Serialized - @MarkBaker [CodePlex #4124](https://phpexcel.codeplex.com/workitem/4124)
+- Notice: Object of class PHPExcel_RichText could not be converted to int - @MarkBaker [CodePlex #4125](https://phpexcel.codeplex.com/workitem/4125)
+- Excel5Writer: utf8 string not converted to utf16 - @MarkBaker [CodePlex #4126](https://phpexcel.codeplex.com/workitem/4126)
+- PHPExcel_RichText and autosize - @MarkBaker [CodePlex #4180](https://phpexcel.codeplex.com/workitem/4180)
+- Excel5Writer produces broken xls files after change mentioned in work item 4126 - @MarkBaker [CodePlex #4574](https://phpexcel.codeplex.com/workitem/4574)
+- Small bug in PHPExcel_Reader_Excel2007 function _readStyle - @MarkBaker [CodePlex #4797](https://phpexcel.codeplex.com/workitem/4797)
+
+## [1.5.0] - 2007-10-23
+
+### Features
+
+- Refactor PHPExcel Drawing - @MarkBaker [CodePlex #3265](https://phpexcel.codeplex.com/workitem/3265)
+- Update Shared/OLE.php to latest version from PEAR - @CS [CodePlex #3079](https://phpexcel.codeplex.com/workitem/3079)
+- Excel2007 vs Excel2003 compatibility pack - @MarkBaker [CodePlex #3217](https://phpexcel.codeplex.com/workitem/3217)
+- Cell protection (lock/unlock) - @MarkBaker [CodePlex #3234](https://phpexcel.codeplex.com/workitem/3234)
+- Create clickable links (hyperlinks) - @MarkBaker [CodePlex #3543](https://phpexcel.codeplex.com/workitem/3543)
+- Additional page setup parameters - @MarkBaker [CodePlex #3241](https://phpexcel.codeplex.com/workitem/3241)
+- Make temporary file path configurable (Excel5) - @MarkBaker [CodePlex #3300](https://phpexcel.codeplex.com/workitem/3300)
+- Small addition to applyFromArray for font - @MarkBaker [CodePlex #3306](https://phpexcel.codeplex.com/workitem/3306)
+
+### Bugfixes
+
+- Better feedback when save of file is not possible - @MarkBaker [CodePlex #3373](https://phpexcel.codeplex.com/workitem/3373)
+- Text Rotation - @MarkBaker [CodePlex #3181](https://phpexcel.codeplex.com/workitem/3181)
+- Small bug in Page Orientation - @MarkBaker [CodePlex #3237](https://phpexcel.codeplex.com/workitem/3237)
+- insertNewColumnBeforeByColumn undefined - @MarkBaker [CodePlex #3812](https://phpexcel.codeplex.com/workitem/3812)
+- Sheet references not working in formula (Excel5 Writer) - @MarkBaker [CodePlex #3893](https://phpexcel.codeplex.com/workitem/3893)
+
+## [1.4.5] - 2007-08-23
+
+### General
+
+- Class file endings - @MarkBaker [CodePlex #3003](https://phpexcel.codeplex.com/workitem/3003)
+- Different calculation engine improvements - @MarkBaker [CodePlex #3081](https://phpexcel.codeplex.com/workitem/3081)
+- Different improvements in PHPExcel_Reader_Excel2007 - @MarkBaker [CodePlex #3082](https://phpexcel.codeplex.com/workitem/3082)
+
+### Features
+
+- Set XML indentation in PHPExcel_Writer_Excel2007 - @MarkBaker [CodePlex #3146](https://phpexcel.codeplex.com/workitem/3146)
+- Optionally store temporary Excel2007 writer data in file instead of memory - @MarkBaker [CodePlex #3159](https://phpexcel.codeplex.com/workitem/3159)
+- Implement show/hide gridlines - @MarkBaker [CodePlex #3063](https://phpexcel.codeplex.com/workitem/3063)
+- Implement option to read only data - @MarkBaker [CodePlex #3064](https://phpexcel.codeplex.com/workitem/3064)
+- Optionally disable formula precalculation - @MarkBaker [CodePlex #3080](https://phpexcel.codeplex.com/workitem/3080)
+- Explicitly set cell datatype - @MarkBaker [CodePlex #3154](https://phpexcel.codeplex.com/workitem/3154)
+
+### Bugfixes
+
+- Implement more Excel calculation functions - @MarkBaker [CodePlex #2346](https://phpexcel.codeplex.com/workitem/2346)
+    - Addition of MINA, MAXA, COUNTA, AVERAGEA, MEDIAN, MODE, DEVSQ, STDEV, STDEVA, STDEVP, STDEVPA, VAR, VARA, VARP and VARPA Excel Functions
+    - Fix to SUM, PRODUCT, QUOTIENT, MIN, MAX, COUNT and AVERAGE functions when cell contains a numeric value in a string datatype, bringing it in line with MS Excel behaviour- File_exists on ZIP fails on some installations - @MarkBaker [CodePlex #2881](https://phpexcel.codeplex.com/workitem/2881)
+- Argument in textRotation should be -90..90 - @MarkBaker [CodePlex #2879](https://phpexcel.codeplex.com/workitem/2879)
+- Excel2007 reader/writer not implementing OpenXML/SpreadsheetML styles 100% correct - @MarkBaker [CodePlex #2883](https://phpexcel.codeplex.com/workitem/2883)
+- Active sheet index not read/saved - @MarkBaker [CodePlex #2513](https://phpexcel.codeplex.com/workitem/2513)
+- Print and print preview of generated XLSX causes Excel2007 to crash - @MarkBaker [CodePlex #2935](https://phpexcel.codeplex.com/workitem/2935)
+- Error in Calculations - COUNT() function - @MarkBaker [CodePlex #2952](https://phpexcel.codeplex.com/workitem/2952)
+- HTML and CSV writer not writing last row - @MarkBaker [CodePlex #3002](https://phpexcel.codeplex.com/workitem/3002)
+- Memory leak in Excel5 writer - @MarkBaker [CodePlex #3017](https://phpexcel.codeplex.com/workitem/3017)
+- Printing (PHPExcel_Writer_Excel5) - @MarkBaker [CodePlex #3044](https://phpexcel.codeplex.com/workitem/3044)
+- Problems reading zip:// - @MarkBaker [CodePlex #3046](https://phpexcel.codeplex.com/workitem/3046)
+- Error reading conditional formatting - @MarkBaker [CodePlex #3047](https://phpexcel.codeplex.com/workitem/3047)
+- Bug in Excel5 writer (storePanes) - @MarkBaker [CodePlex #3067](https://phpexcel.codeplex.com/workitem/3067)
+- Memory leak in PHPExcel_Style_Color - @MarkBaker [CodePlex #3077](https://phpexcel.codeplex.com/workitem/3077)
+
+## [1.4.0] - 2007-07-23
+
+### General
+
+- Coding convention / code cleanup - @MarkBaker [CodePlex #2687](https://phpexcel.codeplex.com/workitem/2687)
+- Use set_include_path in tests - @MarkBaker [CodePlex #2717](https://phpexcel.codeplex.com/workitem/2717)
+
+### Features
+
+- Move PHPExcel_Writer_Excel5 OLE to PHPExcel_Shared_OLE - @MarkBaker [CodePlex #2812](https://phpexcel.codeplex.com/workitem/2812)
+- Hide/Unhide Column or Row - @MarkBaker [CodePlex #2679](https://phpexcel.codeplex.com/workitem/2679)
+- Implement multi-cell styling - @MarkBaker [CodePlex #2271](https://phpexcel.codeplex.com/workitem/2271)
+- Implement CSV file format (reader/writer) - @MarkBaker [CodePlex #2720](https://phpexcel.codeplex.com/workitem/2720)
+
+### Bugfixes
+
+- Implement HTML file format - @MarkBaker [CodePlex #2845](https://phpexcel.codeplex.com/workitem/2845)
+- Active sheet index not read/saved - @MarkBaker [CodePlex #2513](https://phpexcel.codeplex.com/workitem/2513)
+- Freeze Panes with PHPExcel_Writer_Excel5 - @MarkBaker [CodePlex #2678](https://phpexcel.codeplex.com/workitem/2678)
+- OLE.php - @MarkBaker [CodePlex #2680](https://phpexcel.codeplex.com/workitem/2680)
+- Copy and pasting multiple drop-down list cells breaks reader - @MarkBaker [CodePlex #2736](https://phpexcel.codeplex.com/workitem/2736)
+- Function setAutoFilterByColumnAndRow takes wrong arguments - @MarkBaker [CodePlex #2775](https://phpexcel.codeplex.com/workitem/2775)
+- Simplexml_load_file fails on ZipArchive - @MarkBaker [CodePlex #2858](https://phpexcel.codeplex.com/workitem/2858)
+
+## [1.3.5] - 2007-06-27
+
+### Features
+
+- Documentation - @MarkBaker [CodePlex #15](https://phpexcel.codeplex.com/workitem/15)
+- PHPExcel_Writer_Excel5 - @JV
+- PHPExcel_Reader_Excel2007: Image shadows - @JV
+- Data validation - @MarkBaker [CodePlex #2385](https://phpexcel.codeplex.com/workitem/2385)
+
+### Bugfixes
+
+- Implement richtext strings - @MarkBaker
+- Empty relations when adding image to any sheet but the first one - @MarkBaker [CodePlex #2443](https://phpexcel.codeplex.com/workitem/2443)
+- Excel2007 crashes on print preview - @MarkBaker [CodePlex #2536](https://phpexcel.codeplex.com/workitem/2536)
+
+## [1.3.0] - 2007-06-05
+
+### General
+
+- Create PEAR package - @MarkBaker [CodePlex #1942](https://phpexcel.codeplex.com/workitem/1942)
+
+### Features
+
+- Replace *->duplicate() by __clone() - @MarkBaker [CodePlex #2331](https://phpexcel.codeplex.com/workitem/2331)
+- PHPExcel_Reader_Excel2007: Column auto-size, Protection, Merged cells, Wrap text, Page breaks, Auto filter, Images - @JV
+- Implement "freezing" panes - @MarkBaker [CodePlex #245](https://phpexcel.codeplex.com/workitem/245)
+- Cell addressing alternative - @MarkBaker [CodePlex #2273](https://phpexcel.codeplex.com/workitem/2273)
+- Implement cell word-wrap attribute - @MarkBaker [CodePlex #2270](https://phpexcel.codeplex.com/workitem/2270)
+- Auto-size column - @MarkBaker [CodePlex #2282](https://phpexcel.codeplex.com/workitem/2282)
+- Implement formula calculation - @MarkBaker [CodePlex #241](https://phpexcel.codeplex.com/workitem/241)
+
+### Bugfixes
+
+- Insert/remove row/column - @MarkBaker [CodePlex #2375](https://phpexcel.codeplex.com/workitem/2375)
+- PHPExcel_Worksheet::getCell() should not accept absolute coordinates - @MarkBaker [CodePlex #1931](https://phpexcel.codeplex.com/workitem/1931)
+- Cell reference without row number - @MarkBaker [CodePlex #2272](https://phpexcel.codeplex.com/workitem/2272)
+- Styles with same coordinate but different worksheet - @MarkBaker [CodePlex #2276](https://phpexcel.codeplex.com/workitem/2276)
+- PHPExcel_Worksheet->getCellCollection() usort error - @MarkBaker [CodePlex #2290](https://phpexcel.codeplex.com/workitem/2290)
+- Bug in PHPExcel_Cell::stringFromColumnIndex - @SS [CodePlex #2353](https://phpexcel.codeplex.com/workitem/2353)
+- Reader: numFmts can be missing, use cellStyleXfs instead of cellXfs in styles - @JV [CodePlex #2353](https://phpexcel.codeplex.com/workitem/2353)
+
+## [1.2.0] - 2007-04-26
+
+### General
+
+- Stringtable attribute "count" not necessary, provides wrong info to Excel sometimes... - @MarkBaker
+- Updated tests to address more document properties - @MarkBaker
+- Some refactoring in PHPExcel_Writer_Excel2007_Workbook - @MarkBaker
+- New package: PHPExcel_Shared - @MarkBaker
+- Password hashing algorithm implemented in PHPExcel_Shared_PasswordHasher - @MarkBaker
+- Moved pixel conversion functions to PHPExcel_Shared_Drawing - @MarkBaker
+- Switch over to LGPL license - @MarkBaker [CodePlex #244](https://phpexcel.codeplex.com/workitem/244)
+
+### Features
+
+- Include PHPExcel version in file headers - @MarkBaker [CodePlex #5](https://phpexcel.codeplex.com/workitem/5)
+- Autofilter - @MarkBaker [CodePlex #6](https://phpexcel.codeplex.com/workitem/6)
+- Extra document property: keywords - @MarkBaker [CodePlex #7](https://phpexcel.codeplex.com/workitem/7)
+- Extra document property: category - @MarkBaker [CodePlex #8](https://phpexcel.codeplex.com/workitem/8)
+- Document security - @MarkBaker [CodePlex #9](https://phpexcel.codeplex.com/workitem/9)
+- PHPExcel_Writer_Serialized and PHPExcel_Reader_Serialized - @MarkBaker [CodePlex #10](https://phpexcel.codeplex.com/workitem/10)
+- Alternative syntax: Addressing a cell - @MarkBaker [CodePlex #11](https://phpexcel.codeplex.com/workitem/11)
+- Merge cells - @MarkBaker [CodePlex #12](https://phpexcel.codeplex.com/workitem/12)
+
+### Bugfixes
+
+- Protect ranges of cells with a password - @MarkBaker [CodePlex #13](https://phpexcel.codeplex.com/workitem/13)
+- (style/fill/patternFill/fgColor or bgColor can be empty) - @JV [CodePlex #14](https://phpexcel.codeplex.com/workitem/14)
+
+## [1.1.1] - 2007-03-26
+
+### General
+
+- Syntax error in "Classes/PHPExcel/Writer/Excel2007.php" on line 243 - @MarkBaker [CodePlex #1250](https://phpexcel.codeplex.com/workitem/1250)
+- Reader should check if file exists and throws an exception when it doesn't - @MarkBaker [CodePlex #1282](https://phpexcel.codeplex.com/workitem/1282)
+
+## [1.1.0] - 2007-03-22
+
+### Bugfixes
+
+- Style information lost after passing trough Excel2007_Reader - @MarkBaker [CodePlex #836](https://phpexcel.codeplex.com/workitem/836)
+
+### General
+
+- Number of columns > AZ fails fixed in PHPExcel_Cell::columnIndexFromString - @MarkBaker [CodePlex #913](https://phpexcel.codeplex.com/workitem/913)
+
+### Features
+
+- Added a brief file with installation instructions - @MarkBaker
+- Page breaks (horizontal and vertical) - @MarkBaker
+- Image shadows - @MarkBaker
+
+## [1.0.0] - 2007-02-22
+
+### Bugfixes
+
+- PHPExcel->removeSheetByIndex now re-orders sheets after deletion, so no array indexes are lost - @JV
+- PHPExcel_Writer_Excel2007_Worksheet::_writeCols() used direct assignment to $pSheet->getColumnDimension('A')->Width instead of $pSheet->getColumnDimension('A')->setWidth() - @JV
+- DocumentProperties used $this->LastModifiedBy instead of $this->_lastModifiedBy. - @JV
+
+### General
+
+- Only first = should be removed when writing formula in PHPExcel_Writer_Excel2007_Worksheet. - @JV
+- Consistency of method names to camelCase - @JV
+- Updated tests to match consistency changes - @JV
+- Detection of mime-types now with image_type_to_mime_type() - @JV
+- Constants now hold string value used in Excel 2007 - @JV
+
+### Features
+
+- Fixed folder name case (WorkSheet -> Worksheet) - @MarkBaker
+- PHPExcel classes (not the Writer classes) can be duplicated, using a duplicate() method. - @MarkBaker
+- Cell styles can now be duplicated to a range of cells using PHPExcel_Worksheet->duplicateStyle() - @MarkBaker
+- Conditional formatting - @MarkBaker
+- Reader for Excel 2007 (not supporting full specification yet!) - @JV
+
+## [1.0.0 RC] - 2007-01-31
+
+- Project name has been changed to PHPExcel
+- Project homepage is now http://www.codeplex.com/PHPExcel
+- Started versioning at number: PHPExcel 1.0.0 RC
+
+## 2007-01-22
+
+- Fixed some performance issues on large-scale worksheets (mainly loops vs. indexed arrays)
+- Performance on creating StringTable has been increased
+- Performance on writing Excel2007 worksheet has been increased
+
+## 2007-01-18
+
+- Images can now be rotated
+- Fixed bug: When drawings have full path specified, no mime type can be deducted
+- Fixed bug: Only one drawing can be added to a worksheet
+
+## 2007-01-12
+
+- Refactoring of some classes to use ArrayObject instead of array()
+- Cell style now has support for number format (i.e. #,##0)
+- Implemented embedding images
+
+## 2007-01-02
+
+- Cell style now has support for fills, including gradient fills
+- Cell style now has support for fonts
+- Cell style now has support for border colors
+- Cell style now has support for font colors
+- Cell style now has support for alignment
+
+## 2006-12-21
+
+- Support for cell style borders
+- Support for cell styles
+- Refactoring of Excel2007 Writer into multiple classes in package SpreadSheet_Writer_Excel2007
+- Refactoring of all classes, changed public members to public properties using getter/setter
+- Worksheet names are now unique. On duplicate worksheet names, a number is appended.
+- Worksheet now has parent SpreadSheet object
+- Worksheet now has support for page header and footer
+- Worksheet now has support for page margins
+- Worksheet now has support for page setup (only Paper size and Orientation)
+- Worksheet properties now accessible by using getProperties()
+- Worksheet now has support for row and column dimensions (height / width)
+- Exceptions thrown have a more clear description
+
+## Initial version
+
+- Create a Spreadsheet object
+- Add one or more Worksheet objects
+- Add cells to Worksheet objects
+- Export Spreadsheet object to Excel 2007 OpenXML format
+- Each cell supports the following data formats: string, number, formula, boolean.

vendor/phpoffice/phpspreadsheet/CHANGELOG.md

@@ -0,0 +1,368 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com)
+and this project adheres to [Semantic Versioning](https://semver.org).
+
+## [Unreleased]
+
+
+## [1.8.2] - 2019-07-08
+
+### Fixed
+
+- Uncaught error when opening ods file and properties aren't defined - [Issue #1047](https://github.com/PHPOffice/PhpSpreadsheet/issues/1047)
+- Xlsx Reader Cell datavalidations bug - [PR #1052](https://github.com/PHPOffice/PhpSpreadsheet/pull/1052)
+
+## [1.8.1] - 2019-07-02
+
+### Fixed
+
+- Allow nullable theme for Xlsx Style Reader class - [Issue #1043](https://github.com/PHPOffice/PhpSpreadsheet/issues/1043)
+
+## [1.8.0] - 2019-07-01
+
+### Security Fix (CVE-2019-12331)
+
+- Detect double-encoded xml in the Security scanner, and reject as suspicious.
+- This change also broadens the scope of the `libxml_disable_entity_loader` setting when reading XML-based formats, so that it is enabled while the xml is being parsed and not simply while it is loaded.
+  On some versions of PHP, this can cause problems because it is not thread-safe, and can affect other PHP scripts running on the same server. This flag is set to true when instantiating a loader, and back to its original setting when the Reader is no longer in scope, or manually unset.
+- Provide a check to identify whether libxml_disable_entity_loader is thread-safe or not.
+
+  `XmlScanner::threadSafeLibxmlDisableEntityLoaderAvailability()`
+- Provide an option to disable the libxml_disable_entity_loader call through settings. This is not recommended as it reduces the security of the XML-based readers, and should only be used if you understand the consequences and have no other choice.
+ 
+### Added
+
+- Added support for the SWITCH function - [Issue #963](https://github.com/PHPOffice/PhpSpreadsheet/issues/963) and [PR #983](https://github.com/PHPOffice/PhpSpreadsheet/pull/983)
+- Add accounting number format style [#974](https://github.com/PHPOffice/PhpSpreadsheet/pull/974)
+
+### Fixed
+
+- Whitelist `tsv` extension when opening CSV files [#429](https://github.com/PHPOffice/PhpSpreadsheet/issues/429)
+- Fix a SUMIF warning with some versions of PHP when having different length of arrays provided as input [#873](https://github.com/PHPOffice/PhpSpreadsheet/pull/873)
+- Fix incorrectly handled backslash-escaped space characters in number format
+
+## [1.7.0] - 2019-05-26
+
+- Added support for inline styles in Html reader (borders, alignment, width, height)
+- QuotedText cells no longer treated as formulae if the content begins with a `=`
+- Clean handling for DDE in formulae
+
+### Fixed
+
+- Fix handling for escaped enclosures and new lines in CSV Separator Inference
+- Fix MATCH an error was appearing when comparing strings against 0 (always true)
+- Fix wrong calculation of highest column with specified row [#700](https://github.com/PHPOffice/PhpSpreadsheet/issues/700)
+- Fix VLOOKUP 
+- Fix return type hint
+
+## [1.6.0] - 2019-01-02
+
+### Added
+
+- Refactored Matrix Functions to use external Matrix library
+- Possibility to specify custom colors of values for pie and donut charts - [#768](https://github.com/PHPOffice/PhpSpreadsheet/pull/768)
+
+### Fixed
+
+- Improve XLSX parsing speed if no readFilter is applied - [#772](https://github.com/PHPOffice/PhpSpreadsheet/issues/772)
+- Fix column names if read filter calls in XLSX reader skip columns - [#777](https://github.com/PHPOffice/PhpSpreadsheet/pull/777)
+- XLSX reader can now ignore blank cells, using the setReadEmptyCells(false) method. - [#810](https://github.com/PHPOffice/PhpSpreadsheet/issues/810)
+- Fix LOOKUP function which was breaking on edge cases - [#796](https://github.com/PHPOffice/PhpSpreadsheet/issues/796)
+- Fix VLOOKUP with exact matches - [#809](https://github.com/PHPOffice/PhpSpreadsheet/pull/809)
+- Support COUNTIFS multiple arguments - [#830](https://github.com/PHPOffice/PhpSpreadsheet/pull/830)
+- Change `libxml_disable_entity_loader()` as shortly as possible - [#819](https://github.com/PHPOffice/PhpSpreadsheet/pull/819)
+- Improved memory usage and performance when loading large spreadsheets - [#822](https://github.com/PHPOffice/PhpSpreadsheet/pull/822)
+- Improved performance when loading large spreadsheets - [#825](https://github.com/PHPOffice/PhpSpreadsheet/pull/825)
+- Improved performance when loading large spreadsheets - [#824](https://github.com/PHPOffice/PhpSpreadsheet/pull/824)
+- Fix color from CSS when reading from HTML - [#831](https://github.com/PHPOffice/PhpSpreadsheet/pull/831) 
+- Fix infinite loop when reading invalid ODS files - [#832](https://github.com/PHPOffice/PhpSpreadsheet/pull/832) 
+- Fix time format for duration is incorrect - [#666](https://github.com/PHPOffice/PhpSpreadsheet/pull/666)
+- Fix iconv unsupported `//IGNORE//TRANSLIT` on IBM i - [#791](https://github.com/PHPOffice/PhpSpreadsheet/issues/791)
+
+### Changed
+
+- `master` is the new default branch, `develop` does not exist anymore
+
+## [1.5.2] - 2018-11-25
+
+### Security
+
+- Improvements to the design of the XML Security Scanner - [#771](https://github.com/PHPOffice/PhpSpreadsheet/issues/771)
+
+## [1.5.1] - 2018-11-20
+
+### Security
+
+- Fix and improve XXE security scanning for XML-based and HTML Readers - [#771](https://github.com/PHPOffice/PhpSpreadsheet/issues/771)
+
+### Added
+
+- Support page margin in mPDF - [#750](https://github.com/PHPOffice/PhpSpreadsheet/issues/750)
+
+### Fixed
+
+- Support numeric condition in SUMIF, SUMIFS, AVERAGEIF, COUNTIF, MAXIF and MINIF - [#683](https://github.com/PHPOffice/PhpSpreadsheet/issues/683)
+- SUMIFS containing multiple conditions - [#704](https://github.com/PHPOffice/PhpSpreadsheet/issues/704)
+- Csv reader avoid notice when the file is empty - [#743](https://github.com/PHPOffice/PhpSpreadsheet/pull/743)
+- Fix print area parser for XLSX reader - [#734](https://github.com/PHPOffice/PhpSpreadsheet/pull/734)
+- Support overriding `DefaultValueBinder::dataTypeForValue()` without overriding `DefaultValueBinder::bindValue()` - [#735](https://github.com/PHPOffice/PhpSpreadsheet/pull/735)
+- Mpdf export can exceed pcre.backtrack_limit - [#637](https://github.com/PHPOffice/PhpSpreadsheet/issues/637)
+- Fix index overflow on data values array - [#748](https://github.com/PHPOffice/PhpSpreadsheet/pull/748)
+
+## [1.5.0] - 2018-10-21
+
+### Added
+
+- PHP 7.3 support
+- Add the DAYS() function - [#594](https://github.com/PHPOffice/PhpSpreadsheet/pull/594)
+
+### Fixed
+
+- Sheet title can contain exclamation mark - [#325](https://github.com/PHPOffice/PhpSpreadsheet/issues/325)
+- Xls file cause the exception during open by Xls reader - [#402](https://github.com/PHPOffice/PhpSpreadsheet/issues/402)
+- Skip non numeric value in SUMIF - [#618](https://github.com/PHPOffice/PhpSpreadsheet/pull/618)
+- OFFSET should allow omitted height and width - [#561](https://github.com/PHPOffice/PhpSpreadsheet/issues/561)
+- Correctly determine delimiter when CSV contains line breaks inside enclosures - [#716](https://github.com/PHPOffice/PhpSpreadsheet/issues/716)
+
+## [1.4.1] - 2018-09-30
+
+### Fixed
+
+- Remove locale from formatting string - [#644](https://github.com/PHPOffice/PhpSpreadsheet/pull/644)
+- Allow iterators to go out of bounds with prev - [#587](https://github.com/PHPOffice/PhpSpreadsheet/issues/587)
+- Fix warning when reading xlsx without styles - [#631](https://github.com/PHPOffice/PhpSpreadsheet/pull/631)
+- Fix broken sample links on windows due to $baseDir having backslash - [#653](https://github.com/PHPOffice/PhpSpreadsheet/pull/653)
+
+## [1.4.0] - 2018-08-06
+
+### Added
+
+- Add excel function EXACT(value1, value2) support - [#595](https://github.com/PHPOffice/PhpSpreadsheet/pull/595)
+- Support workbook view attributes for Xlsx format - [#523](https://github.com/PHPOffice/PhpSpreadsheet/issues/523)
+- Read and write hyperlink for drawing image - [#490](https://github.com/PHPOffice/PhpSpreadsheet/pull/490)
+- Added calculation engine support for the new bitwise functions that were added in MS Excel 2013
+  - BITAND()          Returns a Bitwise 'And' of two numbers
+  - BITOR()           Returns a Bitwise 'Or' of two number
+  - BITXOR()          Returns a Bitwise 'Exclusive Or' of two numbers
+  - BITLSHIFT()       Returns a number shifted left by a specified number of bits
+  - BITRSHIFT()       Returns a number shifted right by a specified number of bits
+- Added calculation engine support for other new functions that were added in MS Excel 2013 and MS Excel 2016
+  - Text Functions
+    - CONCAT()        Synonym for CONCATENATE()
+    - NUMBERVALUE()   Converts text to a number, in a locale-independent way
+    - UNICHAR()       Synonym for CHAR() in PHPSpreadsheet, which has always used UTF-8 internally
+    - UNIORD()        Synonym for ORD() in PHPSpreadsheet, which has always used UTF-8 internally
+    - TEXTJOIN()      Joins together two or more text strings, separated by a delimiter
+  - Logical Functions
+    - XOR()           Returns a logical Exclusive Or of all arguments
+  - Date/Time Functions
+    - ISOWEEKNUM()    Returns the ISO 8601 week number of the year for a given date
+  - Lookup and Reference Functions
+    - FORMULATEXT()   Returns a formula as a string
+  - Financial Functions
+    - PDURATION()     Calculates the number of periods required for an investment to reach a specified value
+    - RRI()           Calculates the interest rate required for an investment to grow to a specified future value
+  - Engineering Functions
+    - ERF.PRECISE()   Returns the error function integrated between 0 and a supplied limit
+    - ERFC.PRECISE()  Synonym for ERFC
+  - Math and Trig Functions
+    - SEC()           Returns the secant of an angle
+    - SECH()          Returns the hyperbolic secant of an angle
+    - CSC()           Returns the cosecant of an angle
+    - CSCH()          Returns the hyperbolic cosecant of an angle
+    - COT()           Returns the cotangent of an angle
+    - COTH()          Returns the hyperbolic cotangent of an angle
+    - ACOT()          Returns the cotangent of an angle
+    - ACOTH()         Returns the hyperbolic cotangent of an angle
+- Refactored Complex Engineering Functions to use external complex number library
+- Added calculation engine support for the new complex number functions that were added in MS Excel 2013
+    - IMCOSH()        Returns the hyperbolic cosine of a complex number
+    - IMCOT()         Returns the cotangent of a complex number
+    - IMCSC()         Returns the cosecant of a complex number
+    - IMCSCH()        Returns the hyperbolic cosecant of a complex number
+    - IMSEC()         Returns the secant of a complex number
+    - IMSECH()        Returns the hyperbolic secant of a complex number
+    - IMSINH()        Returns the hyperbolic sine of a complex number
+    - IMTAN()         Returns the tangent of a complex number 
+
+### Fixed
+
+- Fix ISFORMULA() function to work with a cell reference to another worksheet
+- Xlsx reader crashed when reading a file with workbook protection - [#553](https://github.com/PHPOffice/PhpSpreadsheet/pull/553)
+- Cell formats with escaped spaces were causing incorrect date formatting - [#557](https://github.com/PHPOffice/PhpSpreadsheet/issues/557)
+- Could not open CSV file containing HTML fragment - [#564](https://github.com/PHPOffice/PhpSpreadsheet/issues/564)
+- Exclude the vendor folder in migration - [#481](https://github.com/PHPOffice/PhpSpreadsheet/issues/481)
+- Chained operations on cell ranges involving borders operated on last cell only [#428](https://github.com/PHPOffice/PhpSpreadsheet/issues/428)
+- Avoid memory exhaustion when cloning worksheet with a drawing [#437](https://github.com/PHPOffice/PhpSpreadsheet/issues/437)
+- Migration tool keep variables containing $PHPExcel untouched [#598](https://github.com/PHPOffice/PhpSpreadsheet/issues/598)
+- Rowspans/colspans were incorrect when adding worksheet using loadIntoExisting [#619](https://github.com/PHPOffice/PhpSpreadsheet/issues/619)
+
+## [1.3.1] - 2018-06-12
+
+### Fixed
+
+- Ranges across Z and AA columns incorrectly threw an exception - [#545](https://github.com/PHPOffice/PhpSpreadsheet/issues/545)
+
+## [1.3.0] - 2018-06-10
+
+### Added
+
+- Support to read Xlsm templates with form elements, macros, printer settings, protected elements and back compatibility drawing, and save result without losing important elements of document - [#435](https://github.com/PHPOffice/PhpSpreadsheet/issues/435)
+- Expose sheet title maximum length as `Worksheet::SHEET_TITLE_MAXIMUM_LENGTH` - [#482](https://github.com/PHPOffice/PhpSpreadsheet/issues/482)
+- Allow escape character to be set in CSV reader – [#492](https://github.com/PHPOffice/PhpSpreadsheet/issues/492)
+
+### Fixed
+
+- Subtotal 9 in a group that has other subtotals 9 exclude the totals of the other subtotals in the range - [#332](https://github.com/PHPOffice/PhpSpreadsheet/issues/332)
+- `Helper\Html` support UTF-8 HTML input - [#444](https://github.com/PHPOffice/PhpSpreadsheet/issues/444)
+- Xlsx loaded an extra empty comment for each real comment - [#375](https://github.com/PHPOffice/PhpSpreadsheet/issues/375)
+- Xlsx reader do not read rows and columns filtered out in readFilter at all - [#370](https://github.com/PHPOffice/PhpSpreadsheet/issues/370)
+- Make newer Excel versions properly recalculate formulas on document open - [#456](https://github.com/PHPOffice/PhpSpreadsheet/issues/456)
+- `Coordinate::extractAllCellReferencesInRange()` throws an exception for an invalid range – [#519](https://github.com/PHPOffice/PhpSpreadsheet/issues/519)
+- Fixed parsing of conditionals in COUNTIF functions - [#526](https://github.com/PHPOffice/PhpSpreadsheet/issues/526)
+- Corruption errors for saved Xlsx docs with frozen panes - [#532](https://github.com/PHPOffice/PhpSpreadsheet/issues/532)
+
+## [1.2.1] - 2018-04-10
+
+### Fixed
+
+- Plain text and richtext mixed in same cell can be read - [#442](https://github.com/PHPOffice/PhpSpreadsheet/issues/442)
+
+## [1.2.0] - 2018-03-04
+
+### Added
+
+- HTML writer creates a generator meta tag - [#312](https://github.com/PHPOffice/PhpSpreadsheet/issues/312)
+- Support invalid zoom value in XLSX format - [#350](https://github.com/PHPOffice/PhpSpreadsheet/pull/350)
+- Support for `_xlfn.` prefixed functions and `ISFORMULA`, `MODE.SNGL`, `STDEV.S`, `STDEV.P` - [#390](https://github.com/PHPOffice/PhpSpreadsheet/pull/390)
+
+### Fixed
+
+- Avoid potentially unsupported PSR-16 cache keys - [#354](https://github.com/PHPOffice/PhpSpreadsheet/issues/354)
+- Check for MIME type to know if CSV reader can read a file - [#167](https://github.com/PHPOffice/PhpSpreadsheet/issues/167)
+- Use proper € symbol for currency format - [#379](https://github.com/PHPOffice/PhpSpreadsheet/pull/379)
+- Read printing area correctly when skipping some sheets - [#371](https://github.com/PHPOffice/PhpSpreadsheet/issues/371)
+- Avoid incorrectly overwriting calculated value type - [#394](https://github.com/PHPOffice/PhpSpreadsheet/issues/394)
+- Select correct cell when calling freezePane - [#389](https://github.com/PHPOffice/PhpSpreadsheet/issues/389)
+- `setStrikethrough()` did not set the font - [#403](https://github.com/PHPOffice/PhpSpreadsheet/issues/403)
+
+## [1.1.0] - 2018-01-28
+
+### Added
+
+- Support for PHP 7.2
+- Support cell comments in HTML writer and reader - [#308](https://github.com/PHPOffice/PhpSpreadsheet/issues/308)
+- Option to stop at a conditional styling, if it matches (only XLSX format) - [#292](https://github.com/PHPOffice/PhpSpreadsheet/pull/292)
+- Support for line width for data series when rendering Xlsx - [#329](https://github.com/PHPOffice/PhpSpreadsheet/pull/329)
+
+### Fixed
+
+- Better auto-detection of CSV separators - [#305](https://github.com/PHPOffice/PhpSpreadsheet/issues/305)
+- Support for shape style ending with `;` - [#304](https://github.com/PHPOffice/PhpSpreadsheet/issues/304)
+- Freeze Panes takes wrong coordinates for XLSX - [#322](https://github.com/PHPOffice/PhpSpreadsheet/issues/322)
+- `COLUMNS` and `ROWS` functions crashed in some cases - [#336](https://github.com/PHPOffice/PhpSpreadsheet/issues/336)
+- Support XML file without styles - [#331](https://github.com/PHPOffice/PhpSpreadsheet/pull/331)
+- Cell coordinates which are already a range cause an exception [#319](https://github.com/PHPOffice/PhpSpreadsheet/issues/319)
+
+## [1.0.0] - 2017-12-25
+
+### Added
+
+- Support to write merged cells in ODS format - [#287](https://github.com/PHPOffice/PhpSpreadsheet/issues/287)
+- Able to set the `topLeftCell` in freeze panes - [#261](https://github.com/PHPOffice/PhpSpreadsheet/pull/261)
+- Support `DateTimeImmutable` as cell value
+- Support migration of prefixed classes
+
+### Fixed
+
+- Can read very small HTML files - [#194](https://github.com/PHPOffice/PhpSpreadsheet/issues/194)
+- Written DataValidation was corrupted - [#290](https://github.com/PHPOffice/PhpSpreadsheet/issues/290)
+- Date format compatible with both LibreOffice and Excel - [#298](https://github.com/PHPOffice/PhpSpreadsheet/issues/298)
+
+### BREAKING CHANGE
+
+- Constant `TYPE_DOUGHTNUTCHART` is now `TYPE_DOUGHNUTCHART`.
+
+## [1.0.0-beta2] - 2017-11-26
+
+### Added
+
+- Support for chart fill color - @CrazyBite [#158](https://github.com/PHPOffice/PhpSpreadsheet/pull/158)
+- Support for read Hyperlink for xml - @GreatHumorist [#223](https://github.com/PHPOffice/PhpSpreadsheet/pull/223)
+- Support for cell value validation according to data validation rules - @SailorMax [#257](https://github.com/PHPOffice/PhpSpreadsheet/pull/257)
+- Support for custom implementation, or configuration, of PDF libraries - @SailorMax [#266](https://github.com/PHPOffice/PhpSpreadsheet/pull/266)
+
+### Changed
+
+- Merge data-validations to reduce written worksheet size - @billblume [#131](https://github.com/PHPOffice/PhpSpreadSheet/issues/131)
+- Throws exception if a XML file is invalid - @GreatHumorist [#222](https://github.com/PHPOffice/PhpSpreadsheet/pull/222)
+- Upgrade to mPDF 7.0+ - [#144](https://github.com/PHPOffice/PhpSpreadsheet/issues/144)
+
+### Fixed
+
+- Control characters in cell values are automatically escaped - [#212](https://github.com/PHPOffice/PhpSpreadsheet/issues/212)
+- Prevent color changing when copy/pasting xls files written by PhpSpreadsheet to another file - @al-lala [#218](https://github.com/PHPOffice/PhpSpreadsheet/issues/218)
+- Add cell reference automatic when there is no cell reference('r' attribute) in Xlsx file. - @GreatHumorist [#225](https://github.com/PHPOffice/PhpSpreadsheet/pull/225) Refer to [issue#201](https://github.com/PHPOffice/PhpSpreadsheet/issues/201)
+- `Reader\Xlsx::getFromZipArchive()` function return false if the zip entry could not be located. - @anton-harvey [#268](https://github.com/PHPOffice/PhpSpreadsheet/pull/268)
+
+### BREAKING CHANGE
+
+- Extracted coordinate method to dedicate class [migration guide](./docs/topics/migration-from-PHPExcel.md).
+- Column indexes are based on 1, see the [migration guide](./docs/topics/migration-from-PHPExcel.md).
+- Standardization of array keys used for style, see the [migration guide](./docs/topics/migration-from-PHPExcel.md).
+- Easier usage of PDF writers, and other custom readers and writers, see the [migration guide](./docs/topics/migration-from-PHPExcel.md).
+- Easier usage of chart renderers, see the [migration guide](./docs/topics/migration-from-PHPExcel.md).
+- Rename a few more classes to keep them in their related namespaces:
+    - `CalcEngine` => `Calculation\Engine`
+    - `PhpSpreadsheet\Calculation` => `PhpSpreadsheet\Calculation\Calculation`
+    - `PhpSpreadsheet\Cell` => `PhpSpreadsheet\Cell\Cell`
+    - `PhpSpreadsheet\Chart` => `PhpSpreadsheet\Chart\Chart`
+    - `PhpSpreadsheet\RichText` => `PhpSpreadsheet\RichText\RichText`
+    - `PhpSpreadsheet\Style` => `PhpSpreadsheet\Style\Style`
+    - `PhpSpreadsheet\Worksheet` => `PhpSpreadsheet\Worksheet\Worksheet`
+
+## [1.0.0-beta] - 2017-08-17
+
+### Added
+
+- Initial implementation of SUMIFS() function
+- Additional codepages
+- MemoryDrawing not working in HTML writer [#808](https://github.com/PHPOffice/PHPExcel/issues/808)
+- CSV Reader can auto-detect the separator used in file [#141](https://github.com/PHPOffice/PhpSpreadsheet/pull/141)
+- HTML Reader supports some basic inline styles [#180](https://github.com/PHPOffice/PhpSpreadsheet/pull/180)
+
+### Changed
+
+- Start following [SemVer](https://semver.org) properly.
+
+### Fixed
+
+- Fix to getCell() method when cell reference includes a worksheet reference - @MarkBaker
+- Ignore inlineStr type if formula element exists - @ncrypthic [#570](https://github.com/PHPOffice/PHPExcel/issues/570)
+- Excel 2007 Reader freezes because of conditional formatting - @rentalhost [#575](https://github.com/PHPOffice/PHPExcel/issues/575)
+- Readers will now parse files containing worksheet titles over 31 characters [#176](https://github.com/PHPOffice/PhpSpreadsheet/pull/176)
+
+### General
+
+- Whitespace after toRichTextObject() - @MarkBaker [#554](https://github.com/PHPOffice/PHPExcel/issues/554)
+- Optimize vlookup() sort - @umpirsky [#548](https://github.com/PHPOffice/PHPExcel/issues/548)
+- c:max and c:min elements shall NOT be inside c:orientation elements - @vitalyrepin [#869](https://github.com/PHPOffice/PHPExcel/pull/869)
+- Implement actual timezone adjustment into PHPExcel_Shared_Date::PHPToExcel - @sim642 [#489](https://github.com/PHPOffice/PHPExcel/pull/489)
+
+### BREAKING CHANGE
+
+- Introduction of namespaces for all classes, eg: `PHPExcel_Calculation_Functions` becomes `PhpOffice\PhpSpreadsheet\Calculation\Functions`
+- Some classes were renamed for clarity and/or consistency:
+
+For a comprehensive list of all class changes, and a semi-automated migration path, read the [migration guide](./docs/topics/migration-from-PHPExcel.md).
+
+- Dropped `PHPExcel_Calculation_Functions::VERSION()`. Composer or git should be used to know the version.
+- Dropped `PHPExcel_Settings::setPdfRenderer()` and `PHPExcel_Settings::setPdfRenderer()`. Composer should be used to autoload PDF libs.
+- Dropped support for HHVM
+
+## Previous versions of PHPExcel
+
+The changelog for the project when it was called PHPExcel is [still available](./CHANGELOG.PHPExcel.md).

vendor/phpoffice/phpspreadsheet/CONTRIBUTING.md

@@ -0,0 +1,11 @@
+# Want to contribute?
+
+If you would like to contribute, here are some notes and guidelines:
+
+ - All new development happens on feature/fix branches, and are then merged to the `master` branch once stable; so the `master` branch is always the most up-to-date, working code
+ - Tagged releases are made from the `master` branch
+ - If you are going to be submitting a pull request, please fork from `master`, and submit your pull request back as a fix/feature branch referencing the GitHub issue number
+ - Code style might be automatically fixed by `composer fix`
+ - All code changes must be validated by `composer check`
+ - [Helpful article about forking](https://help.github.com/articles/fork-a-repo/ "Forking a GitHub repository")
+ - [Helpful article about pull requests](https://help.github.com/articles/using-pull-requests/ "Pull Requests")

vendor/phpoffice/phpspreadsheet/LICENSE

@@ -0,0 +1,345 @@
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