Nette\Forms\Validator::validateInteger PHP Метод

    public static function validateInteger(IControl $control)
    {
        if (Validators::isNumericInt($value = $control->getValue())) {
            if (!is_float($tmp = $value * 1)) {
                // bigint leave as string
                $control->setValue($tmp);
            }
            return TRUE;
        }
        return FALSE;
    }