Facebook Cookbook

Get Friends Who Use My App

Problem

I need to retrieve all of the current loggedinuser’s friends who already have my app installed.

Solution

Use the Friends.getAppUsers() method:

$friends = $facebook->api_client->friends_getAppUsers();

This method has no parameters, and it can be called only for the combination of the current loggedinuser and your application.

Discussion

Friends.getAppUsers() returns an array of uids of the friends who have your app installed. It is against the terms of use of Facebook Platform to store the returned values from this call.

FQL equivalent

If you’d prefer to use FQL to access friends, the equivalent query is:

SELECT uid FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1=$uid)
 AND is_app_user

See App Friends for more information.