Google API / PHP SDK / Plus / Youtube & more

Will be adding some basic information about using the current Google API with the PHP SDK, this includes Google+, Youtube and other services. For setting up the actual API access see the Google documentation and Google Developer Console 

Including the SDK (Github)

require _DIR_TO_AUTOLOAD_SDK_.'/google_sdk/autoload.php'; 
 
// Required Information
 
// OAuth 2.0 

$google_client_id = _GOOGLE_CLIENT_ID_; 

$google_client_secret = _GOOGLE_CLIENT_SECRET_;

 
// Public API-Access

$google_redirect_url = 'http://yourdomain.com/google_login/?option=do_login';

// API-key for a server application!

$google_developer_key = _GOOGLE_DEVELOPER_KEY_;

Prepare Client

$gClient = new Google_Client();


$gClient->setAccessType('offline');


$gClient->setApplicationName('Application Name'); 

$gClient->setClientId($google_client_id);


$gClient->setClientSecret($google_client_secret);


$gClient->setRedirectUri($google_redirect_url);


$gClient->setDeveloperKey($google_developer_key);

Set Scope (Available Scopes)

$gClient->setScopes(array(      

'https://www.googleapis.com/auth/plus.me', 

'https://www.googleapis.com/auth/plus.login',


'https://www.googleapis.com/auth/userinfo.email', 

'https://www.googleapis.com/auth/userinfo.profile',


'https://gdata.youtube.com',


'https://www.googleapis.com/auth/youtube.readonly',             
'https://www.googleapis.com/auth/youtubepartner'
)

);

Setup Google Plus Client

$plus = new Google_Service_Plus($gClient);

Login

session_start();

 
// A simple check for the login to get a fresh token

if($_GET['option'] == "do_login" && empty($_SESSION['google_token'])){

 
// Check for redirect from Google & Auth

if (empty($_GET['code'])) {

 
 // Create Auth redirect                

 header('Location: '.$gClient->createAuthUrl());

                 

} else {                  
                  
 $gClient->authenticate($_GET['code']);

 $access_token = $gClient->getAccessToken();  
 //Store the token in a session or your database for later use

 $_SESSION['google_token'] = $access_token;

 

}       
}
// You have already logged in

if(!empty($_SESSION['google_token'])){

 
 $gClient->setAccessToken($_SESSION['google_token']); 
 

} 
 

Get Google Plus Activity

// Making sure we have a valid access token

if($gClient->getAccessToken()) {

try{

// Get your activities

$optParams = array('maxResults' => 100);


$activities = $plus->activities->listActivities('me', 'public', $optParams); 
 

print_r($activities);

}
 

} catch (Google_ServiceException $e) {

        $htmlBody .= sprintf('<p>A service error occurred: <code>%s</code></p>',

            htmlspecialchars($e->getMessage()));

    } catch (Google_Exception $e) {

        $htmlBody .= sprintf('<p>An client error occurred: <code>%s</code></p>',

            htmlspecialchars($e->getMessage()));

    }