php 将Unicode 转成汉字

<?php

$s
= "\u4e2d\u56fd";//中国

$s=str_replace("\\","%",$s);

function
unescape($str) {

    $str
= rawurldecode($str);

    preg_match_all("/(?:%u.{4})|.{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) == "")

            $ar[$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);

    }

    echo
unescape($s);

?>