How to use login with facebook in php

General PHP Help
#1

Hai,

I want to integrate login with Facebook in my website. and i created APP id and Secret Key, but i am not getting the source code for the integration…!

any suggestion please…?

thanks,
Darshan

#2

I think you need the Facebook SDK for PHP

A nice and recent tut could be found here (just skip the server configuration steps).

One comment: Facebook requires you to use a domain protected by SSL.

Let us know if you have any problems…

#3

@frankbeen thanks for your suggestion i used now Facebook SDK but now after login with face book i waht to redirect to particular custom page but right now loading to face book page…

where should i change the redirection link…?

**<?php

session_start();
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
ini_set('memory_limit', '-1');


 // Include the autoloader provided in the SDK
require_once __DIR__ . '/facebook-php-sdk/autoload.php';

// Include required libraries
use Facebook\Facebook;
use Facebook\Exceptions\FacebookResponseException;
use Facebook\Exceptions\FacebookSDKException;

$appId = '****************'; //Facebook App ID
$appSecret = '**************************'; //Facebook App Secret
$redirectURL = 'https://twitter.com/login'; //Callback URL
$fbPermissions = array('email');  //Optional permissions

$fb = new Facebook(array(
'app_id' => $appId,
'app_secret' => $appSecret,
'default_graph_version' => 'v2.9',
    ));

// Get redirect login helper
$helper = $fb->getRedirectLoginHelper();

// Try to get access token
try {
// Already login
if (isset($_SESSION['facebook_access_token'])) {
    $accessToken = $_SESSION['facebook_access_token'];
} else {
    $accessToken = $helper->getAccessToken();
}

if (isset($accessToken)) {
    if (isset($_SESSION['facebook_access_token'])) {
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
    } else {
        // Put short-lived access token in session
        $_SESSION['facebook_access_token'] = (string) $accessToken;

        // OAuth 2.0 client handler helps to manage access tokens
        $oAuth2Client = $fb->getOAuth2Client();

        // Exchanges a short-lived access token for a long-lived one
        $longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($_SESSION['facebook_access_token']);
        $_SESSION['facebook_access_token'] = (string) $longLivedAccessToken;

        // Set default access token to be used in script
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
    }

    // Redirect the user back to the same page if url has "code" parameter in query string
    if (isset($_GET['code'])) {

        // Getting user facebook profile info
        try {
            $profileRequest = $fb->get('/me?fields=name,first_name,last_name,email,link,gender,locale,picture');
            $fbUserProfile = $profileRequest->getGraphNode()->asArray();
            // Here you can redirect to your Home Page.
            echo "<pre/>";
            print_r($fbUserProfile);
                 } catch (FacebookResponseException $e) {
            echo 'Graph returned an error: ' . $e->getMessage();
            session_destroy();
            // Redirect user back to app login page
            header("Location: ./");
            exit;
               } catch (FacebookSDKException $e) {
            echo 'Facebook SDK returned an error: ' . $e->getMessage();
            exit;
        }
    }
} else {
    // Get login url

    $loginURL = $helper->getLoginUrl($redirectURL, $fbPermissions);
    header("Location: " . $loginURL);
    
       }
     } catch (FacebookResponseException $e) {
     echo 'Graph returned an error: ' . $e->getMessage();
 exit;
  } catch (FacebookSDKException $e) {
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
 }

 ?>**

thanks,
Darshan

#4

I am missing a part from the tutorial:

<?php
session_start();
error_reporting(E_ALL);
ini_set('display_errors', TRUE);
ini_set('display_startup_errors', TRUE);
ini_set('memory_limit', '-1');


 // Include the autoloader provided in the SDK
require_once __DIR__ . '/facebook-php-sdk/autoload.php';

// Include required libraries
use Facebook\Facebook;
use Facebook\Exceptions\FacebookResponseException;
use Facebook\Exceptions\FacebookSDKException;

$appId = '****************'; //Facebook App ID
$appSecret = '**************************'; //Facebook App Secret
$redirectURL = 'https://twitter.com/login'; //Callback URL
$fbPermissions = array('email');  //Optional permissions

$fb = new Facebook(array(
'app_id' => $appId,
'app_secret' => $appSecret,
'default_graph_version' => 'v2.9',
    ));

// Get redirect login helper
$helper = $fb->getRedirectLoginHelper();

// Try to get access token
try {
    if (isset($_SESSION['facebook_access_token'])) {
        $accessToken = $_SESSION['facebook_access_token'];
    } else {
        $accessToken = $helper->getAccessToken();
    }
} catch (FacebookResponseException $e) {
    echo 'Graph returned an error: ' . $e->getMessage();
    exit;
} catch (FacebookSDKException $e) {
    echo 'Facebook SDK returned an error: ' . $e->getMessage();
    exit;
}

if (isset($accessToken)) {
    if (isset($_SESSION['facebook_access_token'])) {
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
    } else {
        // Put short-lived access token in session
        $_SESSION['facebook_access_token'] = (string) $accessToken;

        // OAuth 2.0 client handler helps to manage access tokens
        $oAuth2Client = $fb->getOAuth2Client();

        // Exchanges a short-lived access token for a long-lived one
        $longLivedAccessToken = $oAuth2Client->getLongLivedAccessToken($_SESSION['facebook_access_token']);
        $_SESSION['facebook_access_token'] = (string) $longLivedAccessToken;

        // Set default access token to be used in script
        $fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
    }

    // Redirect the user back to the same page if url has "code" parameter in query string
    if (isset($_GET['code'])) {
        header('Location: whateverpageyoulike.php');  // CHANGE HERE
    }

    // Getting user facebook profile info
    try {
        $profileRequest = $fb->get('/me?fields=name,first_name,last_name,email,link,gender,locale,picture');
        $fbUserProfile = $profileRequest->getGraphNode()->asArray();
        // Here you can redirect to your Home Page.
        print_r($fbUserProfile);
    } catch (FacebookResponseException $e) {
        echo 'Graph returned an error: ' . $e->getMessage();
        session_destroy();
        // Redirect user back to app login page
        header("Location: ./");
        exit;
    } catch (FacebookSDKException $e) {
        echo 'Facebook SDK returned an error: ' . $e->getMessage();
        exit;
    }
} else {
    // Get login url
    $loginURL = $helper->getLoginUrl($redirectURL, $fbPermissions);
    header("Location: " . $loginURL);
}
?>*

Instead of profile.php you could direct to anywhere you like.

#5

you are saying Here…!

try {
$profileRequest = $fb->get(’/me?fields=name,first_name,last_name,email,link,gender,locale,picture’);
$fbUserProfile = $profileRequest->getGraphNode()->asArray();
// Here you can redirect to your Home Page.
echo “

”;

print_r($fbUserProfile);

}
#6

edited my previous post to your complete page with some little changes.

#7

Just now i replaced what you suggested code…,
but it is loading in face book page only…(Facebook - Log In or Sign Up)

i want to load after login successful admindashboard.php file…

can u help me please…?

image
image726×493 12.8 KB

#8

I got the solution…,

thank you…,

#9

I am not able to get the below values… ! it is showing blank page…

 <?php
  session_start();
 ?>

<head>

 <title>Login with Facebook</title>

 <link

    href = "https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css"

    rel = "stylesheet">

</head>

<body>  
<?php if($_SESSION['fb_id']) {?>

    <div class = "container">

       <div class = "jumbotron">

          <h1>Hello <?php echo $_SESSION['fb_name']; ?></h1>

          <p>Welcome to Cloudways</p>

       </div>

          <ul class = "nav nav-list">

             <h4>Image</h4>

             <li><?php echo $_SESSION['fb_pic']?></li>

             <h4>Facebook ID</h4>

             <li><?php echo  $_SESSION['fb_id']; ?></li>

             <h4>Facebook fullname</h4>

             <li><?php echo $_SESSION['fb_name']; ?></li>

             <h4>Facebook Email</h4>

             <li><?php echo $_SESSION['fb_email']; ?></li>

          </ul>

      </div>

 <?php } ?>

any suggestion please…

thanks,
Darshan

#10

check the source code, mostly ctrl+u in the browser. if there’s nothing to see, you have to look into the error.log of your webserver.

#11

Got it …

thanks you :slight_smile:

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