Symfony2教程已弃用功能

I am learning Symfony2 Framework, and to start things of I found this tutorial: Tutorial. Everything has been going well until I hit this issue:

in Tutorial Part2. In Creating the form in the controller section i discover that the getRequest() function is deprecated and bindRequest() is not found in class.

These two have held me back with the tutorial and learning progress. I there any other way of constructing this controller without using these functions or are there other functions that do exactly the same thing.

See this part of the Symfony Documentation. It shows that you should use handleRequest, like so:

// Top of page:
use Symfony\Component\HttpFoundation\Request;
...

// controller action
public function newAction(Request $request)
{
    $form = $this->createFormBuilder()
        // ...
        ->getForm();

    $form->handleRequest($request);

    if ($form->isValid()) {
        // perform some action...

        return $this->redirect($this->generateUrl('task_success'));
    }

    return $this->render('AcmeTaskBundle:Default:new.html.twig', array(
        'form' => $form->createView(),
    ));
}

You may also find this link useful: Handling Form Submissions.

The Request as a Controller Argument

Getting the request object in this way might be a little confusing at first, to quote the documentation:

What if you need to read query parameters, grab a request header or get access to an uploaded file? All of that information is stored in Symfony's Request object. To get it in your controller, just add it as an argument and type-hint it with the Request class:

use Symfony\Component\HttpFoundation\Request;

public function indexAction($firstName, $lastName, Request $request)
{
    $page = $request->query->get('page', 1);

    // ...
}

This information can be found on the Controller Documentation.