Session.gc_divisor

PHP
1 
session.gc_probability=1
session.gc_divisor=1
session.gc_maxlifetime=60

With the setting above in the page “php.ini”,
The session will be undefined 1 minute later everytime.

if I change the above like the following, what happens?

session.gc_probability=1
session.gc_divisor=2
session.gc_maxlifetime=60
2

The difference between session.gc_divisor=1 and session.gc_divisor=2 is, I found, that session.gc_divisor=1 is precise but can be burden to the server, and session.gc_divisor=2 is not precise but can be not burden compared to session.gc_divisor=1.

I like to make it session is active for 3 days, precise, and not burden to the server.
For the purpose of what I like to make, is the code below is correct?

session.gc_probability=0
session.gc_divisor=0
session.gc_maxlifetime=259200

I think that the code above make a session lasts for 3 days.
However I am not sure that session.gc_divisor=0 does make the server to get minimum burdern or not.

3

It will certainly be the least burden. It will also never clean up sessions, so it isn’t very useful…

4

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