Symfony2: check whether session exists or not

Question

Is there a method to check whether a session exists or not?

I tried this method, but it always gives me a 'Bravo !' answer:

        $session = $this->getRequest()->hasPreviousSession();

        if($session)
        {
            return new Response('Bravo !');

        }
        else
        {
            return new Response('Oooops !');
        }

Answer 1

$this->container->get('session')->isStarted()

is what you're looking for.