Gazelle/sections/ajax/get_friends.php

<?php

$DB->query("SELECT
				f.FriendID, u.Username
			FROM friends AS f
				RIGHT JOIN users_enable_recommendations AS r
					ON r.ID = f.FriendID
					AND r.Enable = 1
				RIGHT JOIN users_main AS u
					ON u.ID = f.FriendID
			WHERE f.UserID = '$LoggedUser[ID]'
			ORDER BY u.Username ASC");
echo json_encode($DB->to_array(false, MYSQLI_ASSOC));
die();