how to get current user name by user_id in buddypress?
You can use the very same get_userdata function of WordPress to code a specific function. Stick this in your functions.php: function get_display_name($user_id) { if (!$user = get_userdata($user_id)) return false; return $user->data->display_name; } So you can do something like: $display_name = get_display_name($some_user_id); echo $display_name;