    public static function error ($vars="", $val='') {
        if( isset($vars) && $vars != "" ) {

            $file = GX_PATH.'/inc/lib/Control/Error/'.$vars.'.control.php';
            if (file_exists($file)) {

                include($file);

            }

        }else{

            include(GX_PATH.'/inc/lib/Control/Error/unknown.control.php');

        }
    }
