$txt = "\u7cfb\u7edf\u7e41\u5fd9\uff0c\u8bf7\u7a0d\u540e\u91cd\u8bd5";

function u2c($str)

{

return preg_replace_callback(

"#\\\u([0-9a-f]{4})#i",

function ($r) {

return iconv('UCS-2BE', 'UTF-8', pack('H4', $r[1]));

},

$str

);

}

echo u2c($txt);

轉后后顯示中文“系統繁忙，請稍后重試”