Facebook Image URL gets expired

Question

I am pulling Facebook posts using facebook-graph API, now the problem is Image gets expired after few days.

I have the following URL for a single Image<

Answer 1

http://prntscr.com/h2fe45 here's the part that stays the same and that's all you need to get it every time the link is changed. I saved images back in 2013 and I still can access them.Its almost 2018.