How to check if user shared website (Facebook)? Is it possible?

Question

I am currently writing a website and I need some help about facebook integration. I need a function (PHP or JS, both will help) that can check if a given user shared my website,

Answer 1

First you have to load the Facebook SDK right after your tag:

Then you can use the callback function to do what you want:

Then you should use it like this:

Share on facebook