Up lên dòng thời gian php sdk facebook v5

<?php
session_start();
require_once __DIR__ . '/src/Facebook/autoload.php';
$fb = new Facebook\Facebook([
'app_id' => 'APP_ID',
'app_secret' => 'APP_SECRET',
'default_graph_version' => 'v2.5',
]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['user_posts','manage_pages','publish_pages','publish_actions','email']; // optional

try {
if (isset($_SESSION['facebook_access_token'])) {
$accessToken = $_SESSION['facebook_access_token'];
} else {
$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 (isset($_SESSION['facebook_access_token'])) {
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
} else {
// getting short-lived access token
$_SESSION['facebook_access_token'] = (string) $accessToken;
  // OAuth 2.0 client handler
$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;
// setting default access token to be used in script
$fb->setDefaultAccessToken($_SESSION['facebook_access_token']);
}
// redirect the user back to the same page if it has "code" GET variable
if (isset($_GET['code'])) {
header('Location: ./');
}
// getting basic info about user
try {
$profile_request = $fb->get('/me');
$profile = $profile_request->getGraphNode()->asArray();
} catch(Facebook\Exceptions\FacebookResponseException $e) {
// When Graph returns an error
echo 'Graph returned an error: ' . $e->getMessage();
session_destroy();
// redirecting user back to app login page
header("Location: ./");
exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
// When validation fails or other local issues
echo 'Facebook SDK returned an error: ' . $e->getMessage();
exit;
}

// post on behalf of page
$pages = $fb->get('/me/accounts');
$pages = $pages->getGraphEdge()->asArray();
foreach ($pages as $key) {
if ($key['name'] == 'Funny Demons') {
$post = $fb->post('/' . $key['id'] . '/feed', array('message' => 'just for testing...'), $key['access_token']);
$post = $post->getGraphNode()->asArray();
print_r($post);
}
}
  // Now you can redirect to another page and use the access token from $_SESSION['facebook_access_token']
} else {
// replace your website URL same as added in the developers.facebook.com/apps e.g. if you used http instead of https and you used non-www version or www version of your website then you must add the same here
$loginUrl = $helper->getLoginUrl('https://apps.facebook.com/namespace/', $permissions);
echo '<a href="' . $loginUrl . '">Log in with Facebook!</a>';
}
?>