Can you save a variable in session?

Question

Is there any way to save a variable in the Craft session inside a controller?

I'm running a cron job and I need to store a variable as a session for every run to see if a condition matches.

Answer 1

Craft's HttpSessionService is a thin wrapper for PHP's global $_SESSION variable.

You can use:

craft()->httpSession->add($key, $value)

and:

craft()->httpSession->get($key)

to save and retrieve values from it.

Answer 2

And for those needing this for Craft 3...

Set (previously called 'add'):

Craft::$app->getSession()->set($key, $value);

Get

Craft::$app->getSession()->get($key);