Nette\Forms\Helpers::sanitize PHP Метод

    private static function sanitize($type, $value)
    {
        if ($type === Form::DATA_TEXT) {
            return is_scalar($value) ? Strings::normalizeNewLines($value) : NULL;
        } elseif ($type === Form::DATA_LINE) {
            return is_scalar($value) ? Strings::trim(strtr($value, "\r\n", '  ')) : NULL;
        } elseif ($type === Form::DATA_FILE) {
            return $value instanceof Nette\Http\FileUpload ? $value : NULL;
        } else {
            throw new Nette\InvalidArgumentException('Unknown data type');
        }
    }