Ошибка и неправильный дизайн ThinkPHP 3.2.3

protected function ajaxReturn($data,$type='',$json_option=0) {
        if(empty($type)) $type  =   C('DEFAULT_AJAX_RETURN');
        switch (strtoupper($type)){
            case 'JSON' :
                //Return JSON data format to client containing status information
                header('Content-Type:application/json; charset=utf-8');
                exit(json_encode($data,$json_option));
            case 'XML'  :
                //Return data in XML format
                header('Content-Type:text/xml; charset=utf-8');
                exit(xml_encode($data));
            case 'JSONP':
                //Return JSON data format to client containing status information
                header('Content-Type:application/json; charset=utf-8');
                $handler  =   isset($_GET[C('VAR_JSONP_HANDLER')]) ? $_GET[C('VAR_JSONP_HANDLER')] : C('DEFAULT_JSONP_HANDLER');
                exit($handler.'('.json_encode($data,$json_option).');');  
            case 'EVAL' :
                //Return the executable JS script
                header('Content-Type:text/html; charset=utf-8');
                exit($data);            
            default     :
                //Used to extend other return format data
                Hook::listen('ajax_return',$data);
        }
    }

 array('Admin\Behaviors\ajaxBehavior'),
);