<?php
if(isset($_POST['lang']))
    $WK['lang'] = $_POST['lang'];
elseif(isset($_GET['lang']))
    $WK['lang'] = $_GET['lang'];
elseif(!isset($WK['lang']))
    $WK['lang'] = 'zh';

$file_lang = dirname(__FILE__).'/language/'.$WK['lang'].'.php';

include "$file_lang";
?>