Geek Answers Handbook

Does not work

I am trying to create a facebook login for a website, I tried the example with php-facebook-sdkeven after logging in to facebook. $user variablestill 0 even after logging in to facebook, it does not show the logout URL.

call $ facebook-> getUser (); function always returns 0.

  require '../src/facebook.php';

// Create our Application instance (replace this with your appId and secret).
$facebook = new Facebook(array(
  'appId'  => 'xxx',
  'secret' => 'xxxx',
));

// Get User ID
$user = $facebook->getUser();

// We may or may not have this data based on whether the user is logged in.
//
// If we have a $user id here, it means we know the user is logged into
// Facebook, but we don't know if the access token is valid. An access
// token is invalid if the user logged out of Facebook.

if ($user) {
  try {
    // Proceed knowing you have a logged in user who authenticated.
    $user_profile = $facebook->api('/me');
  } catch (FacebookApiException $e) {
    error_log($e);
    $user = null;
  }
}
print_r($user);
// Login or logout url will be needed depending on current user state.
if ($user) {
  $logoutUrl = $facebook->getLogoutUrl();
} else {
  $statusUrl = $facebook->getLoginStatusUrl();
  $loginUrl = $facebook->getLoginUrl();
}

// This call will always work since we are fetching public data.
$naitik = $facebook->api('/verity.vis');

?>
<!doctype html>
<html xmlns:fb="http://www.facebook.com/2008/fbml">
  <head>
    <title>php-sdk</title>
    <style>
      body {
        font-family: 'Lucida Grande', Verdana, Arial, sans-serif;
      }
      h1 a {
        text-decoration: none;
        color: #3b5998;
      }
      h1 a:hover {
        text-decoration: underline;
      }
    </style>
  </head>
  <body>
    <h1>php-sdk</h1>

    <?php if ($user): ?>
      <a href="<?php echo $logoutUrl; ?>">Logout</a>
    <?php else: ?>
      <div>
        Check the login status using OAuth 2.0 handled by the PHP SDK:
        <a href="<?php echo $statusUrl; ?>">Check the login status</a>
      </div>
      <div>
        Login using OAuth 2.0 handled by the PHP SDK:
        <a href="<?php echo $loginUrl; ?>">Login with Facebook</a>
      </div>
    <?php endif ?>

    <h3>PHP Session</h3>
    <pre><?php print_r($_SESSION); ?></pre>

    <?php if ($user): ?>
      <h3>You</h3>
      <img src="https://graph.facebook.com/<?php echo $user; ?>/picture">

      <h3>Your User Object (/me)</h3>
      <pre><?php print_r($user_profile); ?></pre>
    <?php else: ?>
      <strong><em>You are not Connected.</em></strong>
    <?php endif ?>

    <h3>Public profile of Naitik</h3>
    <img src="https://graph.facebook.com/verity.vis/picture">
    <?php echo $naitik['name']; ?>
  </body>
</html>
+4
source share
1 answer

Facebook 0, . , , , facebook . , . , , .

, . , . "" HTML JSFBSDK , , , (, ..)

// 0. We don't need to clear session
require_once realpath(dirname(__FILE__)) . 'facebook.php';

$current_url = ''; // replace

$facebook = new Facebook(array(
    'appId' => '',
    'secret' => '',
));

$fbCurrentUserID = $facebook->getUser();

// 1. If we cant get the user log him in and request permissions This requests combined permissions (basic + post)
if (!$fbCurrentUserID){
    $loginUrl = $facebook->getLoginUrl(array(
        'scope' => 'email, publish_actions', // Put the permissions you like            
        'redirect_uri' => $current_url, // Replace here
    ));
    die(header('Location: ' . $loginUrl));
}

// 2. So we do have a current FB user. Lets try to read data (Maybe he declined perms)
try {

    $user_profile = $facebook->api('/me');

} catch (FacebookApiException $e) {
    // 2.b Log any error and retry please

    die(header('Location: /'));
}

//Continue your code execution here after all up above went well
+1

More articles:


All Articles