Process Requests
The process_facebook.php file connects to Facebook and compares user information in database table, if connected user information is not available, it registers user using their Facebook data, storing information in the database. In case user information is already available in database, script responses with a welcome back message & logging him in the your website.
process_facebook.php sets PHP session variables to log-in users. You might want to replace the function with your own in-built authentication system to create users or log-in them into your website.
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<?php
session_start(); /* check our post variable from index.php, just to insure user isn't accessing this page directly. You can replace this with strong function, something like HTTP_REFERER etc. */ if(isset($_POST["connect"]) && $_POST["connect"]==1) { include_once("config.php"); //Include configuration file. //Call Facebook API if (!class_exists('FacebookApiException')) { require_once('inc/facebook.php' ); } $facebook = new Facebook(array( 'appId' => $appId, 'secret' => $appSecret, )); $fbuser = $facebook->getUser(); if ($fbuser) { try { // Proceed knowing you have a logged in user who's authenticated. $me = $facebook->api('/me'); //user $uid = $facebook->getUser(); } catch (FacebookApiException $e) { //echo error_log($e); $fbuser = null; } } // redirect user to facebook login page if empty data or fresh login requires if (!$fbuser){ $loginUrl = $facebook->getLoginUrl(array('redirect_uri'=>$return_url, false)); header('Location: '.$loginUrl); } //user details $fullname = $me['first_name'].' '.$me['last_name']; $email = $me['email']; /* connect to mysql */ $connecDB = mysql_connect($hostname, $db_username, $db_password)or die("Unable to connect to MySQL"); mysql_select_db($db_name,$connecDB); //Check user id in our database $result = mysql_query("SELECT COUNT(id) FROM usertable WHERE fbid=$uid"); $UserCount = mysql_fetch_array($result); if($UserCount[0]) { //User exist, Show welcome back message echo 'Ajax Response :<br /><strong>Welcome back '. $me['first_name'] . ' '. $me['last_name'].'!</strong> ( Facebook ID : '.$uid.') [<a href="'.$return_url.'?logout=1">Log Out</a>]'; //print user facebook data echo '<pre>'; print_r($me); echo '</pre>'; //User is now connected, log him in login_user(true,$me['first_name'].' '.$me['last_name']); } else { //User is new, Show connected message and store info in our Database echo 'Ajax Response :<br />Hi '. $me['first_name'] . ' '. $me['last_name'].' ('.$uid.')! <br /> Now that you are logged in to Facebook using jQuery Ajax [<a href="'.$return_url.'?logout=1">Log Out</a>]. <br />the information can be stored in database <br />'; //print user facebook data echo '<pre>'; print_r($me); echo '</pre>'; // Insert user into Database. @mysql_query("INSERT INTO usertable (fbid, fullname, email) VALUES ($uid, '$fullname','$email')"); //User is now connected, log him in login_user(true,$me['first_name'].' '.$me['last_name']); } mysql_close($connecDB); } function login_user($loggedin,$user_name) { /* function stores some session variables to imitate user login. We will use these session variables to keep user logged in, until he/she clicks log-out link. If you are using some authentication library, login user with it instead. */ $_SESSION['logged_in']=$loggedin; $_SESSION['user_name']=$user_name; } ?> |
With jQuery connecting to Facebook is super easy, I am sure this will help you make your own Ajax Facebook Connect, any good feedback would be hugely appreciated, Good luck.
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