Facebook SDK - ＃200：无法发送通知

Question

// Create our Application instance (replace this with your appId and secret).
                    $facebook = new Facebook(array(
                        'appId'  => 'XXXXXXXXXXXXXX',
                        'secret' => 'XXXXXXXXXXXXXXXXXXXX',
                    ));

                    $facebook->api("/$user_id/notifications/", 'post', array(
                        'access_token' => 'XXXXXXXXXXXXXXXXXXXXXXXXX',
                        'template' => "MSG",
                        'href' => "www.google.com",
                    ));

"Fatal error: Uncaught OAuthException: (#200) Cannot send notifications to a user who has not installed the app thrown"

Error occurs after the User remove permissions of the application, there is some means of detecting when the User remove the application, or ignore the error?

Answer 1

Facebook has a webhook that is triggered when a user uninstalls their Facebook app.

From the documentation Detecting when people uninstall apps:

You can enable a deauthorize callback via the App Dashboard. Just go to your app, then choose the Settings menu, and finally the Advanced tab. A text field is provided for the Deauthorize Callback URL.

Whenever a user of your app de-authorizes it, this URL will be sent an HTTP POST containing a signed request. Read our guide to parsing the signed request to see how to decode this to find out the user ID that triggered the callback.