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~

JavaScript代码

复制代码 代码如下:

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:

复制代码 代码如下:

%u6D4B%u8BD5www.jb51.net%22%22%27%27%3C%3E%26%26

解码后:

复制代码 代码如下:

测试www.jb51.net""''<>&&