aqm
/
ios_sign


			
				
					
						
						
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							<?php
// We need the session to check the phrase after submitting
session_start();
?>

<html>
<?php
    if ($_SERVER['REQUEST_METHOD'] == 'POST') {
        // Checking that the posted phrase match the phrase stored in the session
        if (isset($_SESSION['phrase']) && $_SESSION['phrase'] === $_POST['phrase']) {
            echo "<h1>Captcha is valid !</h1>";
        } else {
            echo "<h1>Captcha is not valid!</h1>";
        }
        // The phrase can't be used twice
        unset($_SESSION['phrase']);
    }
?>
    <form method="post">
        Copy the CAPTCHA:
        <?php 
            // See session.php, where the captcha is actually rendered and the session phrase
            // is set accordingly to the image displayed
        ?>
        <img src="session.php" />
        <input type="text" name="phrase" />
        <input type="submit" />
    </form>
</html>