    public static function menuList($var = '')
    {
        $list = self::$listMenu;

        foreach ($list as $k => $v) {
            if (!empty($var) && $k == $var) {
                $selected = 'selected';
            }
            echo "<option value=\"{$k}\" {$selected}>{$v}</option>";
        }
    }
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.