告诉php会话的名字？

Question

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!

Answer 1

You can see the dump of $_SESSION variable

var_dump($_SESSION);