I have script for feed message on facebook group. It works, but I need send feed with images. But don't know how to do it. For feed message I use $facebook->api('<group_id>/feed', 'POST', $attr);
and in $attr is access_token and message.
You can use the following
$postData = array(
'access_token' => '{your access token}',
'message' => '{message}',
'picture' => '{image url}'
);
Then
$facebook->api('<group_id>/feed', 'POST', $postData);
In addition you need to double check that the feed URL posting is enabled on your app settings.
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