Hello,
I have a session that works perfectly expect for one, if I close the browser the session gets destroyed however if I close the current tab and then go back to the site, the session still exists, how can I make sure that the session is destroyed both on a tab close and a window close?
You can't check tab closing with php, you should do it with a combination of the javascript onunload event and ajax call to request the destroy method for the server side session.
The problem here is browser behaviour. Cookies aren't usually destroyed until the browser is closed, and PHP sessions are maintained via a session ID cookie.
Your best bet may be to set the session timeout to something shorter than the default (15 or 30 minutes I believe)
You could try and do something with onunload as Anonymous suggests, but the onunload event is not guaranteed to fire so you won't be certain that the session has been destroyed.
Is there a particular reason you need the session to be destroyed straight away? If we know your exact problem we may be able to suggest a workaround