'Invalid OAuth access token' while getting adAccount detail. - php

Question

I am using FB Ads API, following steps described in documentation and created my PHP file as bellow. It gives me
Fatal error: Uncaught exception 'FacebookAds\Http\Exception\AuthorizationException' with message 'Invalid OAuth access token.' in /project/root/vendor/facebook/php-ads-sdk/src/FacebookAds/Http/Exception/RequestException.php on line 137
and
FacebookAds\Http\Exception\AuthorizationException: Invalid OAuth access token. in /project/root/vendor/facebook/php-ads-sdk/src/FacebookAds/Http/Exception/RequestException.php on line 137
My PHP code snippet is
<?php
require_once DIR . '/vendor/autoload.php';
use Facebook\Facebook;
use Facebook\Exceptions\FacebookResponseException;
use Facebook\Exceptions\FacebookSDKException;
use FacebookAds\Api;
use FacebookAds\Object\AdUser;
// Init PHP Sessions
session_start();
$fb = new Facebook([
'app_id' => 'your-app-id',
'app_secret' => 'your-app-secret',
]);
$helper = $fb->getRedirectLoginHelper();
if (!isset($_SESSION['facebook_access_token'])) {
$_SESSION['facebook_access_token'] = null;
}
if (!$_SESSION['facebook_access_token']) {
$helper = $fb->getRedirectLoginHelper();
try {
$_SESSION['facebook_access_token'] = (string) $helper->getAccessToken();
} catch (FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
exit;
} catch (FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}
}
if ($_SESSION['facebook_access_token']) {
echo "You are logged in!";
$app = Api::init(
'your-app-id', // App ID
'your-app-secret', $_SESSION['facebook_access_token'] // Your user access token
);
$me = new AdUser('me');
$my_adaccount = $me->getAdAccounts()->current();
print_r($my_adaccount->getData());
} else {
$permissions = ['ads_management'];
$loginUrl = $helper->getLoginUrl('http://localhost:8888/marketing-api/', $permissions);
echo 'Log in with Facebook';
}

Answer 1

You should also check that the access token you have has not expired as this will also cause an authentication exception to be thrown. This access token object has the function isExpired which you can use to test this.
You can extend the access token by using Oauth2Client and calling getLongLivedAccessToken.
$long_lived_token =
$fb->getOauth2Client()->getLongLivedAccessToken($access_token);
If you want to see why the token has become invalid, you can use the Developer Debug Tool:
https://developers.facebook.com/tools/debug/