I have this FQL:
$femail = $facebook->api(array( 'method' => 'fql.query', 'locale' => 'en_US', 'query' => 'SELECT email FROM user WHERE uid IN (SELECT uid2 FROM friend WHERE uid1='.$user_id.') AND uid = '.$friend_id.' ORDER BY name ASC', ));
Here is the
Array (  => Array ( [email] => ) )
I want to get friend's email address, but this query results in empty email values. Does I miss something in query? Does it even possible to get friends email? I tested with my partner, she gave permission to the app to give out email address.
In general, you CAN'T get the email address of your friends (source):
User permission Friends permission
email not available
BUT but since your friend has authorized your application, you can try the following in the FQL console:
SELECT email FROM user WHERE uid=FRIEND_ID
What I suspect the problem could be is that you need the "friend's"
access_token to actually get the email because I suppose you are logged-in as your user when trying your query. So you need to grant the
offline_access permission and then use it with the query.
But before doing the above, I would try it with an application
P.S: the sub-query is not needed if you know the friend id.
You can't get email addresses of friends. Each account must opt-in to sharing their email address with the application. Friends can't opt other friends in, which is a good thing.
Also, as @Barkermn01 mentioned, drop the AND uid = '.$friend_id.'