How to make in Yii that the session is deleted after the browser is closed?

Question

Yii

Good afternoon. Do not tell me how to make the session be deleted after closing the browser tab.
Piece of code:

$referrer = Yii::app()->session['VoximplantReferrer'];
if(empty($referrer) ) {
  $referrer = Yii::app()->session['VoximplantReferrer'] = Yii::app()->request->urlReferrer;
}

The script will now save the referrer. But if you close the tab. and log in from another referrer, the script will show the old entry...
Note:
If you completely close the browser, then only the session is deleted.

Answer 1

Clear cookies before leaving on the client
https://www.google.ru/webhp?sourceid=chrome-instan...