php正确解码javascript中通过escape编码后的字符

js的escape如何在PHP中来解呢?

下面的这个函数可以正确的解析,网上有不少unescape的函数,但好用的不多.

这是很久以前收集的一个,不知道谁写的了,但经过测试没有问题~

    function phpUnescape($escstr)
    {
        preg_match_all("/%u[0-9A-Za-z]{4}|%.{2}|[0-9a-zA-Z.+-_]+/", $escstr, $matches);
        $ar = &$matches[0];
        $c = "";
        foreach($ar as $val)
        {
            if (substr($val, 0, 1) != "%")
            {
                $c .= $val;
            } elseif (substr($val, 1, 1) != "u")
            {
                $x = hexdec(substr($val, 1, 2));
                $c .= chr($x);
            }
            else
            {
                $val = intval(substr($val, 2), 16);
                if ($val < 0x7F) // 0000-007F
                {
                    $c .= chr($val);
                } elseif ($val < 0x800) // 0080-0800
                {
                    $c .= chr(0xC0 | ($val / 64));
                    $c .= chr(0x80 | ($val % 64));
                }
                else // 0800-FFFF
                {
                    $c .= chr(0xE0 | (($val / 64) / 64));
                    $c .= chr(0x80 | (($val / 64) % 64));
                    $c .= chr(0x80 | ($val % 64));
                }
            }
        }    

        return $c;
    }  

escape编码后:

%u6D4B%u8BD5www.abc.com%22%22%27%27%3C%3E%26%26

解码后:

测试www.abc.com""''<>&&

http://www.koyoz.com/blog/?action=show&id=207