protected function add($type, $message)
{
if (!isset($_SESSION['messages'])) {
$_SESSION['messages'] = array();
}
$type = strtolower($type);
if (isset($_SESSION['messages'][$type])) {
$_SESSION['messages'][$type][] = $message;
} else {
$_SESSION['messages'][$type] = array($message);
}
return count($_SESSION['messages'][$type]);
}