Thinkphp搭建多语言项目实现思路及方法

public function _generateJsLanguageFile(){ 
        if(C("LANG_SWITCH_ON")){ 
            $jsLangFilePath = "./Public/v2/js/lang"; 
            $langList = L(); 
            $jsLangFileName = $jsLangFilePath."/".LANG_SET.".js"; 
            //@unlink($jsLangFileName);//测试，不永久缓存语言包 
            //已存在语言包 
            if(is_file($jsLangFileName)){ 
                return; 
            } 
            $str = "var $LANG={";
            $total = count($langList);
            $k = 1;
            foreach ($langList as $key => $value) {
                $str .=$key.":'".$value."'";
                if($k < $total){
                    $str .=",";
                }
                // $str .="rn";
                $k++;
            }
            if(!emptyempty($str)){
                $str .= "}";
                $file_handel = fopen($jsLangFileName, "w+");//打开文件，重写模式
                fwrite($file_handel, $str);
                fclose($file_handel);
            }
        }
}