Facebook PHP SDK exception error

Question

I am getting an interesting SDK exception message from FB\'s PHP SDK. I set up my code exactly as the FB docs say to do..?

DEBUG ERROR MESSAGE:

[12-J         


        

Answer 1

For using CakePHP v3.1.6 + Facebook SDK v4.1.

In the newer SDK, \Facebook\FacebookRedirectLoginHelper class has been changed to use \Facebook\FacebookSessionPersistentDataHandler class to handle session "state". Putting $this->request->session()->start() in AppController initialize will fix the problem using Facebook SDK with AuthComponent.

public function initialize() {
    parent::initialize();
    $this->request->session()->start();

    $this->loadComponent('RequestHandler');
    $this->loadComponent('Flash');

    $this->loadComponent('Auth', [
        'authenticate' => [
            'Form' => [
                'fields' => ['username' => 'email', 'password' => 'password']
            ]
        ],
        'loginAction' => ['controller' => 'Users', 'action' => 'login']
    ]);
}