php logiar con google

1<?php
2require_once 'vendor/autoload.php';
3 
4// init configuration
5$clientID = '<YOUR_CLIENT_ID>';
6$clientSecret = '<YOUR_CLIENT_SECRET>';
7$redirectUri = '<REDIRECT_URI>';
8  
9// create Client Request to access Google API
10$client = new Google_Client();
11$client->setClientId($clientID);
12$client->setClientSecret($clientSecret);
13$client->setRedirectUri($redirectUri);
14$client->addScope("email");
15$client->addScope("profile");
16 
17// authenticate code from Google OAuth Flow
18if (isset($_GET['code'])) {
19  $token = $client->fetchAccessTokenWithAuthCode($_GET['code']);
20  $client->setAccessToken($token['access_token']);
21  
22  // get profile info
23  $google_oauth = new Google_Service_Oauth2($client);
24  $google_account_info = $google_oauth->userinfo->get();
25  $email =  $google_account_info->email;
26  $name =  $google_account_info->name;
27 
28  // now you can use this profile info to create account in your website and make user logged in.
29} else {
30  echo "<a href='".$client->createAuthUrl()."'>Google Login</a>";
31}
32?>
33