Why Aren't My Facebook Graph API Requests Working After Upgrading from v2.2 to v2.3?

Troubleshooting Facebook Graph API Issues After Upgrading from 2.2 to 2.3

Problem:

Users are experiencing issues with Facebook Graph API requests returning no results or incorrect data after upgrading from version 2.2 to 2.3.

Cause:

The issue stems from changes in the OAuth access token response format in Facebook API version 2.3. The response is now returned in valid JSON format instead of being URL encoded.

Solution:

To resolve this issue, the following changes need to be made:

Parse OAuth Access Token Response as JSON:

In the getAccessTokenFromCode function, update the code to parse the access token response as JSON:

$response = json_decode($access_token_response);
if (!isset($response->access_token)) {
  return false;
}
return $response->access_token;

Extend Access Token Using JSON Response:

Similarly, update the setExtendedAccessToken function to use the JSON response:

// ...

// Set access token using JSON response
$response = json_decode($access_token_response);
if (!isset($response->access_token)) {
  return false;
}

$this->setPersistentData(
  'access_token', $response->access_token
);

Retrieving User's Birthday:

In version 2.3, the user's birthday is no longer included in the default fields returned by the Graph API. To retrieve the birthday, explicitly specify the "birthday" field in the request:

https://graph.facebook.com/v2.3/{$user_id}?fields=id,name,birthday

After implementing these changes, the Graph API should function as expected in version 2.3.

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