sports_dapi/datainf/lib/functions.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/7/16
 * Time: 17:46
 */

//保留小数位数
function floatPointDigit($data, $long = 2)
{
    $long = intval($long);
    $for1 = "%." . $long . "f";
    $for2 = "%." . ($long + 1) . "f";
    return sprintf($for1, substr(sprintf($for2, $data), 0, -1));
}

/**
 * UUID 生成
 */
function UUID()
{
    $prefix = '';
    $uuid = '';
    $str = md5(uniqid(mt_rand(), true));
    $uuid = substr($str, 0, 8) . '-';
    $uuid .= substr($str, 8, 4) . '-';
    $uuid .= substr($str, 12, 4) . '-';
    $uuid .= substr($str, 16, 4) . '-';
    $uuid .= substr($str, 20, 12);
    return $prefix . $uuid;
}