session_start();

doesn't that generate a cookie, and if so, where can i set the timeout 
or expiration for that cookie?  I am working on a website that i need to 
make sure that after so long it makes the user login again for 
inactivity reasons.

I looked at the php.net documentation for that command, but it doesn't 
give any of the timeout information.

Thanks
Jason Cullins
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