public static function Logout()
{
$DB = GetDB();
self::$authenticated = false;
$cookie_settings = self::GetCookieSettings();
if (isset($_COOKIE[self::COOKIE_NAME])) {
$cookie = array();
parse_str($_COOKIE[self::COOKIE_NAME], $cookie);
$DB->Update('DELETE FROM `tbx_administrator_session` WHERE `username`=? AND `session`=?', array($cookie[self::FIELD_USERNAME], $cookie[self::FIELD_SESSION]));
}
setcookie(self::COOKIE_NAME, false, time() - self::SESSION_LENGTH, $cookie_settings['path'], $cookie_settings['domain']);
}