This works for me:
try {
$statusUpdate = $facebook->api('/me/feed', 'post',
array('name'=>'My APP on Facebook','message'=> 'I am here working',
'privacy'=> array('value'=>'CUSTOM','friends'=>'SELF'),
'description'=>'testing my description',
'picture'=>'https://fbcdn-photos-a.akamaihd.net/mypicture.gif',
'caption'=>'apps.facebook.com/myapp','link'=>'http://apps.facebook.com/myapp'));
} catch (FacebookApiException $e) {
d($e);
}