PHP代码:


function unescape($str) {

  $str = rawurldecode($str);

  preg_match_all("/%u.{4}|&#x.{4};|&#d+;|&#d+?|.+/U",$str,$r);

  $ar = $r[0];

  foreach($ar as $k=>$v) {

    if(substr($v,0,2) == "%u")

      $ar[$k] = iconv("UCS-2","GBK",pack("H4",substr($v,-4)));

    elseif(substr($v,0,3) == "&#x")

      $ar[$k] = iconv("UCS-2","GBK",pack("H4",substr($v,3,-1)));

    elseif(substr($v,0,2) == "&#") {

      $ar[$k] = iconv("UCS-2","GBK",pack("n",preg_replace("/[^d]/","",$v)));

    }

  }

  return join("",$ar);

}