    public function __construct () {
        if (self::existConf()) {
            # code...
            self::config('config');
            self::lang(GX_LANG);
        }else{
            GxMain::install();
        }
        
    }
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.