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Hey all,

I keep track of my users using PHP4 sessions, with verification against a 
PostgreSQL database.

How can I detect when a user logs out / is logged out? I provide a hyperlink 
'Logout' which users are supposed to click, so I can obviously check there. 
My main concern however is that people won't really use that link, but just 
close their browser.. Which means my table with logged in users will never 
get properly updated. Any ideas are appreciated.

Alexander
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