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Login With Facebook Using PHP

Last Updated : Jul 1, 2023

IN - PHP | Written & Updated By - Anjali

In this tutorial we will show how to login with facebook using PHP and facebook Graph API. In this way you can integrate facebook in your website or you can also create a web app using this method.

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Login With Facebook Using PHP

To Login With Facebook Using PHP It Takes Only Two Steps:-

  1. Create a facebook app and get all the details
  2. Make a PHP file to login with facebook

Step 1. Create a facebook app and get all the details

Create a facebook app here https://developers.facebook.com/appsthen get your facebook app id and facebook app secret and then edit configure.php file and insert your details and callback url in respective variable you will find that file in src folder.

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Step 2. Make a PHP file to login with facebook

We make a PHP file and save it with a name fb_login.php 

<?php
require 'src/config.php';
require 'src/facebook.php';

$facebook = new Facebook(array(
 'appId'  => $config['App_ID'],
 'secret' => $config['App_Secret'],
 'cookie' => true
));

if(isset($_GET['fbTrue']))
{
 $token_url = "https://graph.facebook.com/oauth/access_token?". "client_id=".$config['App_ID']."&redirect_uri=" . urlencode($config['callback_url']). "&client_secret=".$config['App_Secret']."&code=" . $_GET['code']; 
 $response = file_get_contents($token_url);
 $params = null;
 parse_str($response, $params);
 $graph_url = "https://graph.facebook.com/me?access_token=" .$params['access_token'];
 $user = json_decode(file_get_contents($graph_url));
 $content = $user;
}
else
{
 $content = '<a href="https://www.facebook.com/dialog/oauth?client_id='.$config['App_ID'].'&redirect_uri='.$config['callback_url'].'&scope=email,user_likes,publish_stream"><img src="./images/login-button.png" alt="Sign in with Facebook"/></a>';
}

include('html.inc');
?>

<html>
<body>

<?php
$config['callback_url'] = "http://www.your_site.com/index.php/?fbTrue=true";
?>

<a href="https://www.facebook.com/dialog/oauth?client_id='.$config['App_ID'].'&redirect_uri='.$config['callback_url'].'&scope=email,user_likes,publish_stream"><img src="./images/login-button.png" alt="Sign in with Facebook"/></a>

</body>
</html>

In this step we add all the required files for facebook login and then create a facebook array and insert all the required variables in facebook graph url provided by facebook and finally get the user details.

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Thats all, this is how to do login with facebook using PHP. You can customize this code further as per your requirement. And please feel free to give comments on this tutorial.

I hope this tutorial on login with facebook helps you and the steps and method mentioned above are easy to follow and implement.

Author Image About Anjali

Experienced Computer Programmer with a broad range of experience in technology. Strengths in application development and Object Oriented architecture design, front end programming, usability and multimedia technology. Expert in coding languages such as C, C++ Java, JavaScript, PHP and more.

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