FilesType for Symfony 2, allows HTML5 multiple file upload.

FilesData.php

<?php

namespace Acme\DemoBundle\Form\Type;

use Symfony\Component\HttpFoundation\File\UploadedFile;

/**
 * Class FilesmData
 */
class FilesmData
{
	/**
	 * @var UploadedFile[]
	 */
	protected $files = array();

	/**
	 * @param UploadedFile[] $files
	 */
	public function setFiles(array $files)
	{
		$this->files = $files;
		return $this;
	}

	/**
	 * @return UploadedFile[]
	 */
	public function getFiles()
	{
		return $this->files;
	}
}

FilesType.php

<?php

namespace Acme\DemoBundle\Form\Type;

use Symfony\Component\Form\Extension\Core\Type\FileType;
use Symfony\Component\Form\FormInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\OptionsResolver\OptionsResolverInterface;
use Symfony\Component\Validator\Constraints as Assert;

/**
 * Class FilesType
 */
class FilesType extends FileType
{
	public function buildView(FormView $view, \Symfony\Component\Form\FormInterface $form, array $options)
	{
		parent::buildView($view, $form, $options);

		$view->vars['full_name'] .= '[]';
		$view->vars['attr']['multiple'] = 'multiple';
	}

	/**
	 * {@inheritdoc}
	 */
	public function setDefaultOptions(OptionsResolverInterface $resolver)
	{
		parent::setDefaultOptions($resolver);
		$resolver->setDefaults(
			array(
				'data_class' => null,
			)
		);
	}

	public function getName()
	{
		return 'files';
	}
}