facebook graph api determine if user likes url

Question

I want to display a different message if a user is currently logged in to facebook and likes the current page. I understand:

FB.Event.subscribe(\'edge.create\'         


        

Answer 1

save user id or third_party_id in database when the user liked the link

to Get third_party_id

graph.facebook.com/me/?fields=third_party_id&access_token=xxx