Symfony\Component\Form\Form::bindRequest PHP Method

    public function bindRequest(Request $request)
    {
        // Store the bound data in case of a post request
        switch ($request->getMethod()) {
            case 'POST':
            case 'PUT':
                $data = array_replace_recursive(
                    $request->request->get($this->getName(), array()),
                    $request->files->get($this->getName(), array())
                );
                break;
            case 'GET':
                $data = $request->query->get($this->getName(), array());
                break;
            default:
                throw new FormException(sprintf('The request method "%s" is not supported', $request->getMethod()));
        }

        return $this->bind($data);
    }

 /**
  * Processes the form with the request
  *
  * @param Form $form
  * @return Message|false the sent message if the form is bound and valid, false otherwise
  */
 public function process(Form $form)
 {
     if ('POST' !== $this->request->getMethod()) {
         return false;
     }
     $form->bindRequest($this->request);
     if ($form->isValid()) {
         return $this->processValidForm($form);
     }
     return false;
 }