post photo to friend wall through graph api

I'm trying to post a photo to one of friends wall using the new graph api. For this I have the following code:

$attachment = array(
   'message' => 'Posted a photo',
   'source' => '@' . realpath(PATH_TO_MY_PHOTO)
);

$facebook->setFileUploadSupport(true);
$facebook->api('/'.$id_friend.'/feed?access_token='.$access_token, 'post', $attachment);

The problem is that the picture is not uploaded. I mean, it only post the message without any picture. This does not work either if I try to post on the current user wall.开发者_如何学JAVA

Does anyone have any idea on how to achieve this ? Thanks.

p.s. I'm requesting only publish_stream permission

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In order to post a poto to a users wall, as in publishing a photo and not a stream story, you can post to here:

http://graph.facebook.com/ALBUM_ID/photos.

for more information visit facebook's graph api photo documentation.

---

You should replace "source" with "picture".

$imagepath='http://site.com/pic.jpg';

$attachment = array( 'message' => 'Posted a photo', 'picture' => $imagepath );

$facebook->setFileUploadSupport(true); $facebook->api('/'.$id_friend.'/feed?access_token='.$access_token, 'post', $attachment)

You can optionally add some more fields. for more details: https://developers.facebook.com/docs/reference/api/post/