fb-callback.php

<?php
include_once('fb-config.php');

try {
  $accessToken = $helper->getAccessToken();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
  // When Graph returns an error
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
  // When validation fails or other local issues
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}

if (!isset($accessToken)) {
  if ($helper->getError()) {
    header('HTTP/1.0 401 Unauthorized');
    echo "Error: " . $helper->getError() . "\n";
    echo "Error Code: " . $helper->getErrorCode() . "\n";
    echo "Error Reason: " . $helper->getErrorReason() . "\n";
    echo "Error Description: " . $helper->getErrorDescription() . "\n";
  } else {
    header('HTTP/1.0 400 Bad Request');
    echo 'Bad request';
  }
  exit;
}

if(!$accessToken->isLongLived()){
  // Exchanges a short-lived access token for a long-lived one
  try {
    $accessToken = $oAuth2Client->getLongLivedAccessToken($accessToken);
  } catch (Facebook\Exceptions\FacebookSDKException $e) {
    echo "<p>Error getting long-lived access token: " . $e->getMessage() . "</p>\n\n";
    exit;
  }
}

//$fb->setDefaultAccessToken($accessToken);

# These will fall back to the default access token
$res 	= 	$fb->get('/me',$accessToken->getValue());
$fbUser	=	$res->getDecodedBody();


$resImg		=	$fb->get('/me/picture?type=large&amp;amp;redirect=false',$accessToken->getValue());
$picture	=	$resImg->getGraphObject();


$_SESSION['fbUserId']		=	$fbUser['id'];
$_SESSION['fbUserName']		=	$fbUser['name'];
$_SESSION['fbAccessToken']	=	$accessToken->getValue();

header('Location: welcome.php');
exit;
?>