Drupal 7 getting all members of an Organic Group

/**
 * Get all users of a group
 */
function _get_users_in_group($gid) {
  $query = db_select('users', 'u');
 
  $query
    ->condition('u.uid', 0, '<>')
    ->condition('u.status', 1, '=')
    ->fields('u', array('uid', 'name'))
    ->join('og_membership', 'ogm', "ogm.gid = :gid AND u.uid = ogm.etid AND ogm.entity_type = 'user'", array(':gid' => $gid));
  return $query->execute();
}

// Get a list of all the users in the group
$group_members = _get_users_in_group($node->nid);
 
// Loop through and load each user
foreach ($group_members AS $member) {
  // Load the user object if necessary
  $user = user_load($member->uid);
 
  // Do whatever else you need to
}