    public static function exist ($vars) {
        if(file_exists(GX_THEME.THEME.'/'.$vars.'.php')) {
            return true;
        }else{
            return false;
        }
    }

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.