We need to get the music favorites from users account through our App using PHP SDK, but calling $facebook->api('/' . $facebookUser['id'] . '/music', 'get') only retrieves the information if the user has changed the permissions for the music favorites to Public.
Is there a way to ask the user for special permission to access their favorites even thought they haven't set those permissions to Public?
You need the user_likes or friends_likes permission to get this.
If it is not set to public, you need to also have a user access_token from a user who can see this information.
If you are trying to circumvent a user's privacy options, that is a good way to get your app banned.