I have searched the Internet and SO for over a week, but have not managed to find anything yet so allow me to ask a question which has already been asked loads of time on SO, but for which none of the answers seem to be working for me.
I have a website and a Facebook page. On my website I have the usual Facebook “Like me” box. As I want to show some extra content to my fans when they visit the website – and encourage non-fans to become a fan – I would like to know if it is possible, via PHP, to:
1. Understand if the user is a fan
2. Understand if the user is logged into Facebook
What I would like to be able to do is send a PHP request to Facebook and receive one of the following three answers: “is a fan”, “not a fan”, “not logged-in/not a Facebook user”.
In the first case I would show the fan-only content, in the secon case I would try to encourage the user to become a fan, while in the third case I would not do anything as I’m not sure the user is a Facebook user.
Please note:
1. I do not need any further identifying information
2. There is no app involved here, as users are fans of my page, although I could build one if necessary
Some answers on SO seem to point to this tutorial, but as my page is not an app, I cannot really use this solution:
http://www.masteringapi.com/tutorials/facebook-api-check-if-a-user-is-fan-of-a-facebook-page/20/
Unfortunately Facebook’s APIs won’t tell you if the user’s logged in or if is a fan of your page until you make the user install your Facebook app (and for the likes you will need
user_likespermission too).The only kind of exception is that when you are running a page tab. At the time facebook embeds your content via an
<iframe>, thesigned_requestPOST parameter that comes with it will tell you if the user is a fan or not. You can read about the signed request’s here..