in reply to How do i know if an user is not on my site anymore??
Just for the sake of the argument I am going to assume that you want
to implement something like the "Other Users" nodelet. There
is really no good way to do this. You could make every user log in/out,
but users are irresponsible, and would fail to logout.
The usual method is to log what time the user last accessed a page, and then when you need to generate a list of logged in users, you go through the log diplay only users that have logged in in the last N minutes.
If you had the times stored in a database you could do:
SELECT username FROM users WHERE (last_access > $time)$time would be the current time minus the "inactivity threshold".
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IndyZ
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