public function logout()
{
$userid = cCfg::getUserData('id');
$sess = session_id();
if ($userid !== false && $sess) {
$where = array(array('session', '=', $sess), 'AND', array('ip', '=', $_SERVER['REMOTE_ADDR']));
$result = cDb::delete('core_authentications', $where);
}
$this->clearSessions();
header('Location: ' . cBuildIndex::getActionUrl(cCfg::getDefaultPage('name')));
}