inv_admin_pages
+-----+-------+--------------------------+
| PID | Title | File |
+-----+-------+--------------------------+
| 1 | Login | includes/pages/login.php |
+-----+-------+--------------------------+
| 2 | Home | includes/pages/home.php |
+-----+-------+--------------------------+
| 3 | Users | includes/pages/users.php |
+-----+-------+--------------------------+
inv_admin_masks - every page,subsection BitWise Mask PID refers to the inv_admin_pages
+----+---------+-----+--------+
| ID | Bitwise | PID | OP |
+----+---------+-----+--------+
| 1 | 1 | 1 | | No SubSection ( OP ) will Show the Login Form
+----+---------+-----+--------+
| 2 | 2 | 1 | Login | SubSection called Login will Log the user in
+----+---------+-----+--------+
| 3 | 4 | 1 | Logout | SubSection of Logout will Log the user out - Subsections still use the page ( login.php )
+----+---------+-----+--------+
| 4 | 1 | 2 | | No Subsection Needed - Admin Home page just shows Stats/Admin Notes etc
+----+---------+-----+--------+
| 5 | 1 | 3 | View | SubSection of View will list the current users
+----+---------+-----+--------+
| 6 | 2 | 3 | Edit | SubSection of Edit - URL will look like index.php?pid=3&op=edit&id=1 - This means it will show details for that User
+----+---------+-----+--------+
| 7 | 4 | 3 | Delete | SubSection of Delete - URL: index.php?pid=3&op=delete&id=1 - Means it will delete user 1
+----+---------+-----+--------+
| 8 | 8 | 3 | Add | SubSection of Add will allow the Admin/User to Add another user
+----+---------+-----+--------+
inv_users
+----+----------+
| ID | Username |
+----+----------+
| 1 | Test |
+----+----------+
| 2 | Fred |
+----+----------+
+----+----------+-------+
| ID | PID | Mask |
+----+----------+-------+
| 1 | 1 | 7 |
+----+----------+-------+
| 2 | 1 | 7 |
+----+----------+-------+
| 2 | 2 | 1 |
+----+----------+-------+
| 2 | 3 | 15 |
+----+----------+-------+