How to use session in Symfony

Question

I\'m getting a hard time trying to understand how symfony session works.
And couldn\'t find the answer I\'m looking for here on S.O. or other external sources.

[SETT

Answer 1

One way of getting Sessions from controller is:

$session = $this->get("session");

Setter: $session->set('id','');

Getter: $session->get('id');

Full Code

public function sessionAction(Request $request) {
    $em = $this->getDoctrine()->getManager();
    $site = $em->getRepository('SiteBundle:Site')->findOneBy(array('url'=>$request->getSchemeAndHttpHost()));
    if($site) {
        $session = $this->get("session");
        $session->set('id',$site->getId());
        $session->set('url',$site->getUrl());
        $session->set('name',$site->getName());
    } else {
        [...]
    }
}

Update-1:

Create service to set session variables

AppBundle\EventListener\SessionHandler.php

doctrine  = $doctrine;
        $this->router    = $router;
        $this->container = $container;
    }

    public function setSession() {
        $route = $this->container->get('request')->get('_route');
        $site = $this->doctrine->getRepository('SiteBundle:Site')->findOneBy(array('url' => $route->getUri()));
        if($site) {
            $session = $this->container->get("session");
            $session->set('id',$site->getId());
            $session->set('url',$site->getUrl());
            $session->set('name',$site->getName());
        } else {
            [...]
        }
    }
}

AppBundle\Resources\config\services.yml

Option-1

Call setSession() function on each page load event.

session_handler:
        class: AppBundle\EventListener\SessionHandler
        arguments: [@doctrine, @router, @service_container]
        tags:
            - {name: kernel.event_listener, event: kernel.request, method: setSession} 

Option-2

Call setSession() function manually where you need to set session.

session_handler:
        class: AppBundle\EventListener\SessionHandler
        arguments: [@doctrine, @router, @service_container]
        tags:
            - {name: kernel.event_listener }

Call setSession() function from controller

$sessionService = $this->get('session_handler');
$sessionService->setSession();