OK. OK. Here's what I need to know.

With my improved login and session system, I need a little function that will delete a session from the database. It's tricky, because, if I just simply delete a session that excesses a certain amount of time, but the user is still on the site, just taking extremely long to read something, or is away for a while. But if I make the time too long, people will assume the other person is online, but they left ages ago.

How would I go about deleting sessions from the database when they actually leave? Or how long would you recommend a session to last?

What I'm basically trying to do is make things a little more accurate.

Would you say after about half an hour of no activity, the session should be deleted? Or what?

-Mackins