How to store class variable inside a Craft controller

Question

namespace Craft;

class Test_FormsController extends BaseController
{

   protected $allowAnonymous = true;
   public $session_id;

    public function actionApply(){
        $appl_template = "1";
        $this->session_id = 15558145;
        return $this->renderTemplate("apply/step".$appl_template.".html");
    }

    public function actionSaveDataStruct(){
        echo 'session:'.$this->session_id.'<br />';
        exit();
    }
}

Hi guys i'm newbie on Craft and my question is:

acctionApply loads form which will send to actionSaveDataStruct, I set a class variable $session_id on actionApply but whenever the form submitted and goes to actionSaveDataStruct, $this->session_id become null again, how do I set variable that will never reset whenever the page load?

Answer 1

In addition to passing the value along through a cookie, you could also do it through PHP's session support.

Adding:

craft()->httpSession->add('sessionId', '123456');

Retrieving:

$sessionId = craft()->httpSession->get('sessionId');

Deleting:

craft()->httpSession->remove('sessionId');

Answer 2

You can use cookies from craft to store / retrieve and delete the session id. Craft checks if the value isn't tampered with and hashed the value.

Creating a cookie:

craft()->userSession->saveCookie('session_id', $this->session_id, $duration);

Where duration is in seconds, don't know what happens if you use 0.

For retrieving the cookie value

$sessionId = craft()->userSession->getStateCookieValue('sessionId');

If you want to delete the cookie in the final step.

craft()->userSession->deleteStateCookie('session_id');

Good luck!