Session timeout

[hykc]

Hi,

I had searched thru the forum about session timeout, most people suggested to use DB to store the session timestamp.

my question is does session.gc_maxlifetime setting really work?
coz my login script creates a session using
$_SESSION['user_login'] = 1;
but after the default session.gc_maxlifetime is reached, the session still there.
So is there any method to timeout the session without using DB?

thanks