// Initialize the Google_Client object $client = new Google_Client(); $client->setClientId('YOUR_CLIENT_ID'); $client->setClientSecret('YOUR_CLIENT_SECRET'); // Set the access token to revoke $access_token = 'USER_ACCESS_TOKEN_HERE'; $client->revokeToken($access_token);In this example, we first initialize a `Google_Client` object with our client ID and client secret. Then, we set the access token that we want to revoke and call the `revokeToken` method on the client object. This method is part of the Google API PHP client library.