I need a script in PHP, which allows users to log in from my site, and also automatically be logged on the forum.
Also when one registers automatically also has to register to the forum, while for existing users on the site, if they are not registered on the forum, on their first automatic access to it also creates the forum account.
The login and registration shall be made only on the site, the forum will close registrations and log in.
The forum is based on the latest version of InvisionPowerBoard, While the site is custom but simple.