Q:

Is it possible to see active sessions using php?

I am developing a php application. Is it possible to get active sessions and session values on my server? 
And is it possible to end up a particular session?

A:

If you want maximum flexibility with sessions you can save all your sessions in a database. Then it is very easy to get number of sessions, content of any session, kill them, etc...
http://shiflett.org/articles/storing-sessions-in-a-database
As a bonus you will increase the security!

