Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be discussing about how to Implement Login via Facebook in PHP.
We can use facebook login to allow users have access to the site. This tutorial guide gives an in-depth explanation about login with facebook PHP SDK.
We can use facebook login to allow users have access to the site. This tutorial guide gives an in-depth explanation about login with facebook PHP SDK.
Login with Facebook(Steps)
- Visit facebook for developers portal and click on add new group button so as to make the app ID.
- Choose website.
- Give an app name and click on the Create New Facebook App ID.
- Click on Create app ID.
- Click on Skip Quick Test.
On the final stage, it will display as the image below -
READ: PHP for Perl Developers
fbconfig.php File Overview
- Now open fbconfig.php file and add your app ID and the app Secrete.
FacebookSession::setDefaultApplication( 'your app ID','App Secrete ' ); // login helper with redirect_uri $helper = new FacebookRedirectLoginHelper('You web address' );
Finally fbconfig.php file as seen below -
<?php session_start(); // added in v4.0.0 require_once 'autoload.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\Entities\AccessToken; use Facebook\HttpClients\FacebookCurlHttpClient; use Facebook\HttpClients\FacebookHttpable; // init app with app id and secret FacebookSession::setDefaultApplication( '496544657159182','e6d239655aeb3e496e52fabeaf1b1f93' ); // login helper with redirect_uri $helper = new FacebookRedirectLoginHelper('https://www.webdesigntutorialz.com/' ); try { $session = $helper->getSessionFromRedirect(); }catch( FacebookRequestException $ex ) { // When Facebook returns an error }catch( Exception $ex ) { // When validation fails or other local issues } // see if we have a session if ( isset( $session ) ) { // graph api request for user data $request = new FacebookRequest( $session, 'GET', '/me' ); $response = $request->execute(); // get response $graphObject = $response->getGraphObject(); $fbid = $graphObject->getProperty('id'); // To Get Facebook ID $fbfullname = $graphObject->getProperty('name'); // To Get Facebook full name $femail = $graphObject->getProperty('email'); // To Get Facebook email ID /* ---- Session Variables -----*/ $_SESSION['FBID'] = $fbid; $_SESSION['FULLNAME'] = $fbfullname; $_SESSION['EMAIL'] = $femail; /* ---- header location after session ----*/ header("Location: index.php"); }else { $loginUrl = $helper->getLoginUrl(); header("Location: ".$loginUrl); } ?>
READ: Form Validation in PHP
Login Page Overview
Login page is used to log into Facebook -
<?php session_start(); session_unset(); $_SESSION['FBID'] = NULL; $_SESSION['FULLNAME'] = NULL; $_SESSION['EMAIL'] = NULL; header("Location: index.php"); ?>
index.php
The index.php page is as shown below -
<?php session_start(); ?> <html xmlns:fb = "http://www.facebook.com/2008/fbml"> <head> <title>Login with Facebook</title> <link href = "http://www.bootstrapcdn.com/twitter-bootstrap/2.2.2/css/bootstrap-combined.min.css" rel = "stylesheet"> </head> <body> <?php if ($_SESSION['FBID']): ?> <!-- After user login --> <div class = "container"> <div class = "hero-unit"> <h1>Hello <?php echo $_SESSION['USERNAME']; ?></h1> <p>Welcome to "facebook login" tutorial</p> </div> <div class = "span4"> <ul class = "nav nav-list"> <li class = "nav-header">Image</li> <li><img src = "https://graph.facebook.com/<?php echo $_SESSION['FBID']; ?>/picture"></li> <li class = "nav-header">Facebook ID</li> <li><?php echo $_SESSION['FBID']; ?></li> <li class = "nav-header">Facebook fullname</li> <li><?php echo $_SESSION['FULLNAME']; ?></li> <li class = "nav-header">Facebook Email</li> <li><?php echo $_SESSION['EMAIL']; ?></li> <div><a href="logout.php">Logout</a></div> </ul> </div> </div> <?php else: ?> <!-- Before login --> <div class = "container"> <h1>Login with Facebook</h1> Not Connected <div> <a href = "fbconfig.php">Login with Facebook</a> </div> <div> <a href = "http://www.webdesigntutorialz.com" title = "Login with facebook">More information about Webdesigntutorialz</a> </div> </div> <?php endif ?> </body> </html>
Output
When the above code is implemented, it will produce the following result. Before you try this example, kindly logout your facebook account in your web browser -
Logout Facebook
The following code below is used to logout Facebook -
<?php session_start();. session_unset(); $_SESSION['FBID'] = NULL; $_SESSION['FULLNAME'] = NULL; $_SESSION['EMAIL'] = NULL; header("Location: index.php"); ?>
Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about PHP Paypal integration.
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Thanks for reading and bye for now.
