An application can test whether the currently signed-in user is a registered administrator for the application. An administrator is a user who can access the Administration Console for the application. You can use the Administration Console to manage which users have administrator status.
The function UserService::isCurrentUserAdmin() returns True if the current user is an administrator for the application.
use google\appengine\api\users\User;
use google\appengine\api\users\UserService;
$user = UserService::getCurrentUser();
if (isset($user)) {
echo 'Welcome, ' . $user->getNickname();
if (UserService::isCurrentUserAdmin()) {
echo 'Go to admin area';
}
}
Tip: An easy way to restrict access to a part of your application to administrators is to use the login: admin configuration element for the URL handler. See Configuring an App.