A Simple vBulletin Session Question

[CvP]

The vB_Session class has a method called save().
I wanna know from where exactly vB calls this method. Can't find it :o

[kh99]

$vbulletin->session->save() is called in function exec_shut_down(), which is in includes/funcitons.php.

[CvP]

thanks.

i fail at grep :x