    public static function ajax ($vars="", $val='') {

        if( isset($vars) && $vars != "" ) {

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

                include($file);

            }else {
                self::error('404');
            }

        }

    }

The software constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.