function isUserLoggedIn() {
global $loggedInUser;
// Must exist AND must be an object
if (!isset($loggedInUser) || !is_object($loggedInUser)) {
return false;
}
// Must have the property
if (!property_exists($loggedInUser, 'user_id')) {
return false;
}
// Must be a valid user
return ($loggedInUser->user_id > 0);
}
