url中文转码

<?php$s = "\u4e2d\u56fd";$s=str_replace("\\","%",$s);function unescape($str) { $str = rawurldecode($str); preg_match_all("/(?:%u.{4})|.{4};|&#\d+;|.+/U",$str,$r); $ar = $r[0]; #print_r($ar); foreach($ar as $k=>$v) { if(substr($v,0,2) == "%u") $ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,-4))); elseif(substr($v,0,3) == "") $ar[$k] = iconv("UCS-2","GB2312",pack("H4",substr($v,3,-1))); elseif(substr($v,0,2) == "&#") { echo substr($v,2,-1).""; $ar[$k] = iconv("UCS-2","GB2312",pack("n",substr($v,2,-1))); } } return join("",$ar);}echo unescape($s);?>