[php]unescape

function unescape($text){
return urldecode(preg_replace_callback('/%u([[:alnum:]]{4})/', create_function(
                '$word',
                'return iconv("UTF-16LE", "UHC", chr(hexdec(substr($word[1], 2, 2))).chr(hexdec(substr($word[1], 0, 2))));'
                ), $text));
}