Is it possible to get Facebook feed, likes and comments from a closed group that I own using the Facebook API + PHP

Question

I want to build a web application that gets feed, likes and comments from a closed group that I own - using the Facebook API + PHP

I saw that I can get information using

Answer 1

There was a missing token and permission definition. This webpage has a simple example of how it suppose to look like:

http://www.benmarshall.me/facebook-sdk-php-v4/