class UploadedData {

    /**
     * @Assert\File(maxSize="6000000")
     */
    public $file;

    /**
     * @Assert\NotBlank
     */
    public $name;
}

  public function addAction(){

    $uploadedData = new UploadedData();

    $formUpload = $this->createFormBuilder($uploadedData)
        ->add('file')
        ->add('name')
        ->getForm();

    $debug = '';
    $photos = array();

    if ($this->get('request')->getMethod() === 'POST'){

      $formUpload->bindRequest($this->get('request'));

      if ($this->get('request')->get('submit-photo'))
      {
        for ($i = 0; $i < 3; $i++) {
            $photo = $this->get('request')->get("photo-".$i);
            if (isset($photo)){
                array_push($photos,$photo);
            }
        }

        if($formUpload->isValid())
        {
            $debug = $debug.' Upload OK';
        }else{
            $debug = $debug.' Invalid Upload';
        }
      }
    }

    return $this->container->get('templating')->renderResponse('LCShopBundle:Item:add.html.twig',
    array(
          'formUpload' => $formUpload->createView(),
          'photos' => $photos,
          'debug' => $debug)
    );

  }

{{ form_widget(formUpload.file) }}<input type="submit" name="submit-photo" value="Load">