    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';
        }
    }
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.