Facebook API sdk 4.0 - post a photo onto facebook

Question

I am trying to create an application where the user can browse and submit a photo from their computer onto their facebook. For this, they will first have to upload their photo o

Answer 1

OK, there are two main issues with your code.

FIRST:

Remove session_destroy() from your code. It's the reason why the session is being deleted. You can then remove the second use of $session = new FacebookSession( $_SESSION['fb_token']); from your code. You only need to do that bit once!

Change:

echo '<a href="' . $helper->getLogoutUrl( $session, 'http://localhost/app/index.php', session_destroy() ) .    '">Logout</a>';

to

echo '<a href="' . $helper->getLogoutUrl( $session, 'http://localhost/app/index.php' ) .    '">Logout</a>';

SECOND:

Append @ to your source and you will find that the image uploads correctly. E.g.:

$request = new FacebookRequest(
  $session,
  'POST',
  '/me/photos',
  array (
    'source' => new CURLFile( $location.$name ),
  )
);

CURLFile only works on PHP 5.5+. For earlier version of PHP, set source to:

'source' => '@' . $location.$name

Answer 2

Assuming that the user has correctly uploaded the image and $location.$name is the path:

 $request = new FacebookRequest(
     $session,
     'POST',
     '/me/photos',
     array (
        'source' => file_get_contents($location.$name),
     )
  );

 $response = $request->execute();
 $graphObject = $response->getGraphObject();

Or another possibility is via URL:

 $request = new FacebookRequest(
   $session,
   'POST',
   '/me/photos',
   array (
     'url' => $the_url_to_the_image,
   )
 );

 $response = $request->execute();
 $graphObject = $response->getGraphObject();

And the API call you do AFTER the upload is done by the user but that is not more than logical.