OAuth Login for Facebook Twitter and Google Plus Using PHP

Posted 5:12 pm by muni & filed under CakePHP, HTML5, JQUERY, MYSQL, PHP.

So far in this series of user registration and login we had seen simple user login and registration using php objected oriented programming.

User registration and Login Using PHP5, MySQLi, jQuery and Bootstrap

Then we have seen how to integrate twitter OAuth login using PHP

Sign in with Twitter OAuth API Using PHP

Then we have seen integration of Facebook OAuth 2 login using PHP.

Facebook OAuth 2 Login Using PHP

Finally we had seen integration Google Plus OAuth 2 login using PHP.

Login with Google OAuth 2 Using PHP and MySQL

So in this tutorial we are going to implement the Facebook, Twitter and Google OAuth logins in single tutorial. So before continuing this tutorial please refer above four tutorials.

Demo OAuth Login for Facebook Twitter and Google Plus Using PHP

I had kept this social login handling in a separate php file (login.php), where i included all php SDK of Facebook, Twitter and login. When user clicks on login with Facebook, Twitter or Google, then user will be redirected to this login.php file. This login.php will make login request to Facebook, Twitter or Google. Once user successfully authenticated, then OAuth response will be saved in database and let the user to login in our application.

Here is the login.php file script.

<?php
ob_start();
session_start();
require_once 'config.php';

//initalize user class
$user_obj = new Cl_User();

/*** Twitter****/
require_once('twitteroauth/twitteroauth.php');
/*** Twitter****/

/*******Google ******/
require_once 'Google/src/config.php';
require_once 'Google/src/Google_Client.php';
require_once 'Google/src/contrib/Google_PlusService.php';
require_once 'Google/src/contrib/Google_Oauth2Service.php';
/*******Google ******/

/*********Facebook Login **********/
require_once('Facebook/FacebookSession.php');
require_once('Facebook/FacebookRedirectLoginHelper.php');
require_once('Facebook/FacebookRequest.php');
require_once('Facebook/FacebookResponse.php');
require_once('Facebook/FacebookSDKException.php');
require_once('Facebook/FacebookRequestException.php');
require_once('Facebook/FacebookAuthorizationException.php');
require_once('Facebook/GraphObject.php');
require_once('Facebook/GraphUser.php');
require_once('Facebook/GraphSessionInfo.php');
require_once( 'Facebook/HttpClients/FacebookHttpable.php' );
require_once( 'Facebook/HttpClients/FacebookCurl.php' );
require_once( 'Facebook/HttpClients/FacebookCurlHttpClient.php' );
require_once( 'Facebook/Entities/AccessToken.php' );
require_once( 'Facebook/Entities/SignedRequest.php' );

use Facebook\FacebookSession;
use Facebook\FacebookRedirectLoginHelper;
use Facebook\FacebookRequest;
use Facebook\FacebookResponse;
use Facebook\FacebookSDKException;
use Facebook\FacebookRequestException;
use Facebook\FacebookAuthorizationException;
use Facebook\GraphObject;
use Facebook\GraphUser;
use Facebook\GraphSessionInfo;

FacebookSession::setDefaultApplication(FB_APP_ID, FB_APP_SECRET);
$helper = new FacebookRedirectLoginHelper(FB_REDIRECT_URI);

if(isset($_GET['type']) && $_GET['type'] == 'facebook' ){

	$fb_url = $helper->getLoginUrl(array('email'));
	header('Location: ' . $fb_url);
}

$session = $helper->getSessionFromRedirect();

if(isset($_SESSION['token'])){
	$session = new FacebookSession($_SESSION['token']);
	try{
		$session->validate(FB_APP_ID, FB_APP_SECRET);
	}catch(FacebookAuthorizationException $e){
		echo $e->getMessage();
	}
}

$data = array();

if(isset($session)){
	$_SESSION['token'] = $session->getToken();
	$request = new FacebookRequest($session, 'GET', '/me');
	$response = $request->execute();
	$graph = $response->getGraphObject(GraphUser::className());

	$data = $graph->asArray();
	$id = $graph->getId();
	$image = "https://graph.facebook.com/".$id."/picture?width=100";
	$data['image'] = $image;
	if($user_obj->fb_login($data)){header('Location: home.php');}
	else{header('Location: index.php');}
}
/*********Facebook Login **********/

/*******Google ******/

$client = new Google_Client();
$client->setScopes(array('https://www.googleapis.com/auth/plus.login','https://www.googleapis.com/auth/userinfo.email', 'https://www.googleapis.com/auth/plus.me'));
$client->setApprovalPrompt('auto');

if(isset($_GET['type']) && $_GET['type'] == 'google' ){
	$authUrl = $client->createAuthUrl();
	header('Location: ' . $authUrl);
}
$plus       = new Google_PlusService($client);
$oauth2     = new Google_Oauth2Service($client);
//unset($_SESSION['access_token']);

if(isset($_GET['code'])) {
	$client->authenticate(); // Authenticate
	$_SESSION['access_token'] = $client->getAccessToken(); // get the access token here 
	header('Location: http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF']);
}

if(isset($_SESSION['access_token'])) {
	$client->setAccessToken($_SESSION['access_token']);
}

if ($client->getAccessToken()) {
	$_SESSION['access_token'] = $client->getAccessToken();
	$user         = $oauth2->userinfo->get();
	try {
		if($user_obj->google_login( $user ))header('Location: home.php');
		else header('Location: index.php');
	}catch (Exception $e) {
		$error = $e->getMessage();
	}
}
/*******Google ******/

/*** Twitter****/
if (TWITTER_CONSUMER_KEY === '' || TWITTER_CONSUMER_SECRET === '' || TWITTER_CONSUMER_KEY === 'TWITTER_CONSUMER_KEY_HERE' || TWITTER_CONSUMER_SECRET === 'CONSUMER_SECRET_HERE') {
	echo 'You need a consumer key and secret to test the sample code. Get one from <a href="https://dev.twitter.com/apps">dev.twitter.com/apps</a>';
	exit;
}

if(isset($_GET['type']) && $_GET['type'] == 'twitter' ){ 
	$connection = new TwitterOAuth(TWITTER_CONSUMER_KEY, TWITTER_CONSUMER_SECRET);
	$request_token = $connection->getRequestToken(TWITTER_OAUTH_CALLBACK);
	$_SESSION['oauth_token'] = $token = $request_token['oauth_token'];
	$_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret']; 
	//echo "<pre>";print_r($connection);echo "</pre>";
	//echo "<pre>";print_r($_SESSION);echo "</pre>";exit;
	switch ($connection->http_code) {
		case 200:
			$url = $connection->getAuthorizeURL($token); //echo $url;exit;
			header('Location: ' . $url);
			break;
		default:
			$error = 'Could not connect to Twitter. Refresh the page or try again later.';
	}
}else{
	if(( isset( $_SESSION['oauth_token'] ) ) ){
		$connection = new TwitterOAuth(TWITTER_CONSUMER_KEY, TWITTER_CONSUMER_SECRET, $_SESSION['oauth_token'], $_SESSION['oauth_token_secret']);
		$access_token = $connection->getAccessToken($_REQUEST['oauth_verifier']);
		$_SESSION['access_token'] = $access_token;
		$content = $connection->get('account/verify_credentials');
		$data = array();
		if( !empty( $content->id )){
			$data['id'] = $content->id;
			$data['name'] = $content->name;
			$data['screen_name'] = $content->screen_name;
			$data['picture'] = $content->profile_image_url;
			try {
				if($user_obj->twitter_login($data))header('Location: index.php');
			}catch (Exception $e) {
				$error = $e->getMessage();
			}

		}else{
			session_unset();
			session_destroy();
			header('Location: index.php');
		}
	}
}
/*** Twitter****/

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