    public static function cat($vars) {
        switch (SMART_URL) {
            case true:
                # code...
                $url = Options::get('siteurl')."/".$vars."/".Typo::slugify(Categories::name($vars));
                break;
            
            default:
                # code...
                $url = Options::get('siteurl')."/index.php?cat={$vars}";
                break;

        }

        return $url;
    }
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.