'; $client_secret = ''; $redirect_uri = ''; $client = new Google_Client(); $client->setClientId($client_id); $client->setClientSecret($client_secret); $client->setRedirectUri($redirect_uri); $client->setScopes('email'); /************************************************ If we're logging out we just need to clear our local access token in this case ************************************************/ if (isset($_REQUEST['logout'])) { unset($_SESSION['access_token']); } /************************************************ If we have a code back from the OAuth 2.0 flow, we need to exchange that with the authenticate() function. We store the resultant access token bundle in the session, and redirect to ourself. ************************************************/ if (isset($_GET['code'])) { $client->authenticate($_GET['code']); $_SESSION['access_token'] = $client->getAccessToken(); $redirect = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']; header('Location: ' . filter_var($redirect, FILTER_SANITIZE_URL)); } /************************************************ If we have an access token, we can make requests, else we generate an authentication URL. ************************************************/ if (isset($_SESSION['access_token']) && $_SESSION['access_token']) { $client->setAccessToken($_SESSION['access_token']); } else { $authUrl = $client->createAuthUrl(); } /************************************************ If we're signed in we can go ahead and retrieve the ID token, which is part of the bundle of data that is exchange in the authenticate step - we only need to do a network call if we have to retrieve the Google certificate to verify it, and that can be cached. ************************************************/ if ($client->getAccessToken()) { $_SESSION['access_token'] = $client->getAccessToken(); $token_data = $client->verifyIdToken()->getAttributes(); } echo pageHeader("User Query - Retrieving An Id Token"); if (strpos($client_id, "googleusercontent") == false) { echo missingClientSecretsWarning(); exit; } ?>
Connect Me!"; } else { echo "Logout"; } ?>