I am trying to use Google's OAuth2 API. In their generic documentation, they mention a call called UserInfo: http://code.google.com/apis/accounts/docs/OAuth2Login.html#userinfocall , which would allow me to retrieve user ids, email, name and other basic stuff.
However I cannot find it in their PHP client library: https://code.google.com/p/google-api-php-client/
Where is it?
The Google OAuth2 API has changed - here is how you fetch user information nowadays:
<?php
require_once('google-api-php-client-1.1.7/src/Google/autoload.php');
const TITLE = 'My amazing app';
const REDIRECT = 'https://example.com/myapp/';
session_start();
$client = new Google_Client();
$client->setApplicationName(TITLE);
$client->setClientId('REPLACE_ME.apps.googleusercontent.com');
$client->setClientSecret('REPLACE_ME');
$client->setRedirectUri(REDIRECT);
$client->setScopes(array(Google_Service_Plus::PLUS_ME));
$plus = new Google_Service_Plus($client);
if (isset($_REQUEST['logout'])) {
unset($_SESSION['access_token']);
}
if (isset($_GET['code'])) {
if (strval($_SESSION['state']) !== strval($_GET['state'])) {
error_log('The session state did not match.');
exit(1);
}
$client->authenticate($_GET['code']);
$_SESSION['access_token'] = $client->getAccessToken();
header('Location: ' . REDIRECT);
}
if (isset($_SESSION['access_token'])) {
$client->setAccessToken($_SESSION['access_token']);
}
if ($client->getAccessToken() && !$client->isAccessTokenExpired()) {
try {
$me = $plus->people->get('me');
$body = '<PRE>' . print_r($me, TRUE) . '</PRE>';
} catch (Google_Exception $e) {
error_log($e);
$body = htmlspecialchars($e->getMessage());
}
# the access token may have been updated lazily
$_SESSION['access_token'] = $client->getAccessToken();
} else {
$state = mt_rand();
$client->setState($state);
$_SESSION['state'] = $state;
$body = sprintf('<P><A HREF="%s">Login</A></P>',
$client->createAuthUrl());
}
?>
<!DOCTYPE HTML>
<HTML>
<HEAD>
<TITLE><?= TITLE ?></TITLE>
</HEAD>
<BODY>
<?= $body ?>
<P><A HREF="<?= REDIRECT ?>?logout">Logout</A></P>
</BODY>
</HTML>
Do not forget to -
https://example.com/myapp/ at the same placeYou can find official examples at Youtube GitHub.
The PHP client was updated: https://code.google.com/p/google-api-php-client/issues/detail?id=43
I have posted a solution that works for me, a patch to the Google PHP client library to retrieve UserInfo, in this similar question: How to identify a Google OAuth2 user?
