会话 Symfony2 不保留值

Question

class myController extends Controller
{
    public function newAction($id)
    {
        $session = $this->get('session');
        if(is_null(($session->get('foo')))){
            echo "the variable foo is no set in session";
            $session->set('foo', 'bar');
        }
    }
}

为什么每次加载动作时都会出现回声的消息？

Answer 1

这对

我有用：

class SessionTestController extends Controller
{
    public function testAction()
    {
        $session = $this->get('session');
        if (is_null($session->get('foo'))) {
            $session->set('foo', 'bar');
            $responseText = 'foo is null';
        } else {
            $responseText = 'foo is set';
        }
        // Use a response object
        return new Response($responseText);
    }
}