Question

When using the Facebook API to login to a website, can you pull a list of that user’s friends who have logged in using the same app id?

Answer 1

I don’t think that there’s a Graph API method for this yet, there’s a REST method though called friends.getAppUsers.

Now to do this without REST API there are a couple of ways, one of them:

1. User login using Facebook => insert a new record in your user table if not exists
2. Retrieve the user’s friends by calling the /USER_ID/friends connection
3. Prepare a comma separated string of the user friends’ ids to get the users (friends) from your user table: SELECT * FROM user WHERE user_fb_id IN ($friends_id)