Symfony2 Sessions>存储和检索会话中的项目数组/集合

I do not know if this is question worthy. I have read up on the documentation, but coming from and old PHP $_SESSION environment I am not sure how to implement. I have a quiz type application. At initiation of the quiz I want to get all the questions in the quiz and store them in the session. When retrieving the next question I want to check if the questions exist in the the session, if they do then I retrieve the next question. I have the following:I do not know if this is question worthy. I hav