php里实现javascript的unescape函数的功能

//加密函数 function escape($str) { preg_match_all("/[\x80-\xff]. ¦[\x01-\x7f]+/",$str,$r); $ar = $r[0]; foreach($ar as $k=>$v) { if(ord($v[0]) < 128) $ar[$k] = rawurlencode($v); else $ar[$k] = "%u".bin2hex(iconv("GB2312","UCS-2",$v)); } return join("",$ar); } //解密函数 function unescape($str) { $str = rawurldecode($str); preg_match_all("/(?:%u.{4}) &brvbar.+/",$str,$r); $ar = $r[0]; foreach($ar as $k=>$v) { if(substr($v,0,2) == "%u" && strlen($v) == 6) $ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,-4))); } return join("",$ar); } 要求iconv函数可用（iconv扩展库已加载），否则需要自行编程查表

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