Symfony\Component\Form\Extension\Core\DataTransformer\DateTimeToArrayTransformer::reverseTransform PHP Method

    public function reverseTransform($value)
    {
        if (null === $value) {
            return null;
        }

        if (!is_array($value)) {
            throw new UnexpectedTypeException($value, 'array');
        }

        if ('' === implode('', $value)) {
            return null;
        }

        $emptyFields = array();

        foreach ($this->fields as $field) {
            if (!isset($value[$field])) {
                $emptyFields[] = $field;
            }
        }

        if (count($emptyFields) > 0) {
            throw new TransformationFailedException(
                sprintf('The fields "%s" should not be empty', implode('", "', $emptyFields)
            ));
        }

        if (isset($value['month']) && !ctype_digit($value['month']) && !is_int($value['month'])) {
            throw new TransformationFailedException('This month is invalid');
        }

        if (isset($value['day']) && !ctype_digit($value['day']) && !is_int($value['day'])) {
            throw new TransformationFailedException('This day is invalid');
        }

        if (isset($value['year']) && !ctype_digit($value['year']) && !is_int($value['year'])) {
            throw new TransformationFailedException('This year is invalid');
        }

        if (!empty($value['month']) && !empty($value['day']) && !empty($value['year']) && false === checkdate($value['month'], $value['day'], $value['year'])) {
            throw new TransformationFailedException('This is an invalid date');
        }

        try {
            $dateTime = new \DateTime(sprintf(
                '%s-%s-%s %s:%s:%s %s',
                empty($value['year']) ? '1970' : $value['year'],
                empty($value['month']) ? '1' : $value['month'],
                empty($value['day']) ? '1' : $value['day'],
                empty($value['hour']) ? '0' : $value['hour'],
                empty($value['minute']) ? '0' : $value['minute'],
                empty($value['second']) ? '0' : $value['second'],
                $this->outputTimezone
            ));

            if ($this->inputTimezone !== $this->outputTimezone) {
                $dateTime->setTimezone(new \DateTimeZone($this->inputTimezone));
            }
        } catch (\Exception $e) {
            throw new TransformationFailedException($e->getMessage(), $e->getCode(), $e);
        }

        return $dateTime;
    }

 /**
  * @expectedException Symfony\Component\Form\Exception\TransformationFailedException
  */
 public function testReverseTransformWithStringYear()
 {
     $transformer = new DateTimeToArrayTransformer();
     $transformer->reverseTransform(array('year' => 'bazinga', 'month' => '2', 'day' => '31', 'hour' => '4', 'minute' => '5', 'second' => '6'));
 }