The function is located here:
http://api13.cakephp.org/view_source/cake-session/#l-784
The value passed is the one from the php config, session.gc_maxlifetime,
so in my case 3600.
On Wednesday, August 1, 2012 7:58:09 PM UTC+2, cricket wrote:
>
> Where is __gc() called and what value is passed to it?
>
> On Wed, Aug 1, 2012 at 3:12 AM, Crazy wrote:
> > I'm having some issues with my sessions.
> >
> > It's probably configuration somewhere, but don't know what to
> change/where
> > to look.
> >
> > I'm using database sessions for my cake application, these sessions are
> not
> > getting cleaned up.
> >
> > The app in question I have the issue on is an old one written on 1.3.10
> > running with php version 5.3.5. The garbage collection function in the
> 2.x
> > branch is the same so don't think the framework version will matter.
> >
> > I've tracked down the issue to the function __gc located in the
> CakeSession
> > class and that function is registered there in the php
> > session_set_save_handler function, this is the function in question:
> >
> > /**
> > * Helper function called on gc for database sessions.
> > *
> > * @param integer $expires Timestamp (defaults to current time)
> > * @return boolean Success
> > * @access private
> > */
> > function __gc($expires = null) {
> > $model =& ClassRegistry::getObject('Session');
> >
> > if (!$expires) {
> > $expires = time();
> > }
> >
> > $return = $model->deleteAll(array($model->alias . ".expires <" =>
> > $expires), false, false);
> > return $return;
> > }
> >
> > Now, the comments say that $expires is a timestamp, but this isn't
> correct
> > according to the php docs:
> >
> > gc($lifetime)
> > The garbage collector callback is invoked internally by PHP periodically
> in
> > order to purge old session data. The frequency is controlled by
> > session.gc_probability and session.gc_divisor. The value of lifetime
> which
> > is passed to this callback can be set in session.gc_maxlifetime. Return
> > value should be TRUE for success, FALSE for failure.
> >
> > The value for $lifeime, so gc_maxlifetime in php.ini is the following:
> >
> > ; After this number of seconds, stored data will be seen as 'garbage'
> and
> > ; cleaned up by the garbage collection process.
> > session.gc_maxlifetime = 3600
> >
> > So this results in a query that never deletes anything:
> >
> > delete from cake_sessions where expires < 3600;
> >
> > Could someone clarify what I'm doing wrong or if this is an issue in
> cake
> > itself?
> >
> >
> > I've posted this on ask.cakephp.org as well, when I find the answer
> I'll
> > make sure to update both locations.
> >
> >
> http://ask.cakephp.org/questions/view/database_sessions_garbage_collection_issue
>
> >
> > --
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