JS端 escape编码后 PHP端解码函数

JS端中的编码函数
编码： escape
解码： unescape
JS中的此编码函数可以实现把空格也编码成字符串，

但是 用此函数编码后 JS传参之后，PHP端接收后 需要解码 现在放出解码函数

<?php

function unescape($str) {
$str = rawurldecode($str);
preg_match_all("/%u.{4}|&#x.{4};|&#\d+;|.+/U",$str,$r);
$ar = $r[0];
foreach($ar as $k=>$v) {
if(substr($v,0,2) == "%u")
$ar[$k] = iconv("UCS-2","utf-8",pack("H4",substr($v,-4)));
elseif(substr($v,0,3) == "&#x")
$ar[$k] = iconv("UCS-2","utf-8",pack("H4",substr($v,3,-1)));
elseif(substr($v,0,2) == "&#") {
$ar[$k] = iconv("UCS-2","utf-8",pack("n",substr($v,2,-1)));
}
}
return join("",$ar);
}

?>