Get User Id from Facebook in PHP

Question

I am trying to make a Facebook app and need user id from Facebook when the user opens the applicaiton. I have setup my application and its show mock form on the Facebook can

Answer 1

Download the PHP SDK

A very simple code example to get the user id - if the user is logged in and has authorised the application then $facebook->getUser() will give you the users id:

require 'facebook.php';

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

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

if ($user) {
  try {
    // Get the user profile data you have permission to view
    $user_profile = $facebook->api('/me');
    echo "
";
    print_r($user_profile);
    echo "
";
  } catch (FacebookApiException $e) {
    $user = null;
  }
} else {
  die('');
}

Take a look a the examples within the SDK and on the Facebook Developers Site.