How would you perform `debug_token` call using facebook php sdk?

Question

According to the documentation the endpoint looks like

GET /debug_token?
     input_token={input-token}&
     access_token={access-token}

w

Answer 1

OK, so if one needs an app access token, app_id|app_secret (both values concatenated with a pipe symbol in the middle) always works.

The method getApplicationAccessToken seems to have been protected in the PHP SDK up to 3.2.2 – whereas getAppId and getAppSecret are already public in that version; so those could be the alternative to hard-coding id and secret in place.

Answer 2

The PHP SDK has the getOAuth2Client() client method, that returns a \Facebook\Authentication\OAuth2Client instance.

This has the debugToken($accessToken) method, that returns a \Facebook\Authentication\AccessTokenMetadata instance that contains data about the access token.

$appid = '123456789';
$appsecret = 'foobar';

$api = new Facebook(['app_id' => $appid, 'app_secret' => $appsecret]);

$oauth = $api->getOAuth2Client();
$meta = $oauth->debugToken($accessToken);
$meta->validateAppId($appid); // Will throw a FacebookSDKException if invalid

$meta->getIsValid(); // boolean
$meta->getExpiresAt(); // \DateTime|null