How to get the request parameters in Symfony 2?

I am very new to symfony. In other languages like java and others I can use request.getParameter('parmeter name') to get the value.

Is there anything similar that we can do with symfony2.
I have seen some examples but none is working for me. Suppose I have a form field with the name username. In the form action I tried to use something like this:

$request = $this->getRequest();
$username= $request->request->get('username'); 

I have also tried

$username = $request->getParameter('username');

and

$username=$request->request->getParameter('username');

But none of the options is working.However following worked fine:

foreach($request->request->all() as $req){
    print_r($req['username']);
}

Where am I doing wrong in using getParameter() method. Any help will be appreciated.

The naming is not all that intuitive:

use Symfony\Component\HttpFoundation\Request;

public function updateAction(Request $request)
{
    // $_GET parameters
    $request->query->get('name');

    // $_POST parameters
    $request->request->get('name');

Update Nov 2021: $request->get('name') has been deprecated in 5.4 and will be private as of 6.0. It's usage has been discouraged for quite some time.

I do it even simpler:

use Symfony\Component\HttpFoundation\Request;

public function updateAction(Request $request)
{
    $foo = $request->get('foo');
    $bar = $request->get('bar');
}

Another option is to introduce your parameters into your action function definition:

use Symfony\Component\HttpFoundation\Request;

public function updateAction(Request $request, $foo, $bar)
{
    echo $foo;
    echo $bar;
}

which, then assumes that you defined {foo} and {bar} as part of your URL pattern in your routing.yml file:

acme_myurl:
    pattern:  /acme/news/{foo}/{bar}
    defaults: { _controller: AcmeBundle:Default:getnews }

You can Use The following code to get your form field values

use Symfony\Component\HttpFoundation\Request;

public function updateAction(Request $request)
{
    // retrieve GET and POST variables respectively
    $request->query->get('foo');
    $request->request->get('bar', 'default value if bar does not exist');
}

Or You can also get all the form values as array by using

$request->request->all()

try

$request->request->get('acme_demobundle_usertype')['username']

inspect attribute name of your formular field

Inside a controller:

$request = $this->getRequest();
$username = $request->get('username');

As now $this->getRequest() method is deprecated you need to inject Request object into your controller action like this:

public function someAction(Request $request)

after that you can use one of the following.

If you want to fetch POST data from request use following:

$request->request->get('var_name');

but if you want to fetch GET data from request use this:

$request->query->get('var_name');

Your options:

1. Simple:
   • $request->request->get('param') ($_POST['param']) or
   • $request->query->get('param') ($_GET['param'])
2. Good Symfony forms with all validation, value transormation and form rendering with errors and many other features:
   • http://symfony.com/doc/current/book/forms.html
   • http://symfony.com/doc/current/cookbook/form/index.html
3. Something in between (see example below)

<?php
/**
 * @Route("/customers", name="customers")
 *
 * @param Request $request
 * @return Response
 */
public function index(Request $request)
{
    $optionsResolver = new OptionsResolver();
    $optionsResolver->setDefaults([
        'email' => '',
        'phone' => '',
    ]);
    $filter = $optionsResolver->resolve($request->query->all());

    /** @var CustomerRepository $customerRepository */
    $customerRepository = $this->getDoctrine()->getRepository('AppBundle:Customer');

    /** @var Customer[] $customers */
    $customers = $customerRepository->findFilteredCustomers($filter);

    return $this->render(':customers:index.html.twig', [
        'customers' => $customers,
        'filter' => $filter,
    ]);
}

More about OptionsResolver - http://symfony.com/doc/current/components/options_resolver.html

You can do it this:

$clientName = $request->request->get('appbundle_client')['clientName'];

Sometimes, when the attributes are protected, you can not have access to get the value for the common method of access:

(POST)

 $clientName = $request->request->get('clientName');

(GET)

$clientName = $request->query->get('clientName');

(GENERIC)

$clientName = $request->get('clientName');

Most of the cases like getting query string or form parameters are covered in answers above.

When working with raw data, like a raw JSON string in the body that you would like to give as an argument to json_decode(), the method Request::getContent() can be used.

$content = $request->getContent();

Additional useful informations on HTTP requests in Symfony can be found on the HttpFoundation package's documentation.

For symfony 4 users:

$query = $request->query->get('query');

$request = Request::createFromGlobals();
$getParameter = $request->get('getParameter');

use Symfony\Component\HttpFoundation\Request;

public function indexAction(Request $request, $id) {

    $post = $request->request->all();

    $request->request->get('username');

}

Thanks , you can also use above code

#www.example/register/admin

  /**
 * @Route("/register/{role}", name="app_register", methods={"GET"})
 */
public function register(Request $request, $role): Response
{
 echo $role ;
 }

If you need getting the value from a select, you can use:

$form->get('nameSelect')->getClientData();

Try this, it works

$this->request = $this->container->get('request_stack')->getCurrentRequest();

Regards

public function indexAction(Request $request)
{
   $data = $request->get('corresponding_arg');
   // this also works
   $data1 = $request->query->get('corresponding_arg1');
}