Symfony2: setting a cookie - php

Question

I'm trying to set a cookie within a login controller to achieve "remember me" system. Even though I've used the exact code I found on the web, things for me are going wrong. I hope you can help me figure out what I'm missing.
Let's go through the code:
public function loginAction(Request $request) {
// Receiving the login form
// Get Doctrine, Get EntityManager, Get Repository
if(/* form information matche database information */) {
// Creating a session => it's OK
// Creating the cookie
$response = new Response();
$response->headers->setCookie(new Cookie("user", $user));
$response->send();
$url = $this->generateUrl('home');
return $this->redirect($url);
} else
return $this->render('***Bundle:Default:Login.html.php');
}
I included these:
use Symfony\Component\HttpFoundation\Response;
use Symfony\Component\HttpFoundation\Cookie;
Note that logging-in works fine, the session has been created, but the cookie hasn't.

Answer 1

Instead of:
$response->send();
try to use:
$response->sendHeaders();
After this you should be able to redirect.

Answer 2

By default Symfony\Component\HttpFoundation\Cookie is created as HttpOnly, which triggers security measures in supporting browsers; this helps mitigate certain XSS attacks possible in javascript.
To expose the cookie in such a browser set $httpOnly argument to false:
new Cookie('user', $user, 0, '/', null, false, false); //last argument
It's worth noting that at the time of this edit the framework is configured to not use HttpOnly cookies by default: see the cookbook (cookie_httponly).