| File Purpose: | File Depedencies |
| To cleanly and safely log a user out of the system. | n/a |
| External Function call | Location of Definiton |
| n/a | n/a |
| External Variable Name | Purpose |
| $_SESSION | to unset all session variables |
| Internal Function call | Purpose |
| session_start() | PHP Built-in Function |
| session_destroy() | PHP Built-in Function |
| setcookie() | defines a cookie to be sent. |
| Class Name | Purpose |
| n/a | n/a |
| Local Variables | Purpose |
| $host | contains host information. |
| $url | contains url information |
| $extra | contains status of the logout (true/false) |
| Comments | NONE |