I installed a pre-built forum on my website and I want (in a diffrent page) to check if the forum's session is active.  

Something like :

```
if (isset($_SESSION['forum'])) { echo "Session is active!"; }

```

Problem is - I don't know the sessions name...
Tried downloading some chrome add-ons for session managing but I can't get the name of the session.

Whats the right way of doing this?  

Thanks ahead!