[thelist] Sessions. When do they End?

[adams.craigv]

Hello. 

I've been playing with coldfusion (blah) and php (sweet) for the last few
months.

Occassionally I've had the need to use session variables.
I'm curious to know when a Session ends exactly, other than when you kill
it explicitly.

So far I know, session variables die when the client closes their browser.
But, when else? 

Personally... in most cases, I'd like the session variables to die when the
client leave the website's domain.

I've searched around trying to gain some wisdom on this issue, but alas,
I'm full of failure.

Peace and all that cal,
 hup.

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