Some variables are needed to add functionality to FluxBB, most are common to version 1.2 and 1.4.
Unfortunately the documentation describes only constants and functions.
Contains information on the current user (the one who submit a post for example).
It is created in the functions.php file.
The keys are the columns of the users table.
Contains information about the configuration of the forum.
The keys are created as needed by the system.
Defined in /lang/English/common.php.
Used to display common messages.
Defined in /lang/English/profile.php
Contains messages displayed in the file /profile.php.
Defined in /lang/English/post.php.
Messages displayed in the files /post.php and /edit.php.
Start time of a session.
There are also the variables defined in config.php.