/** * Checks if an email address is on a given list with status "subscribed" * * @param string $list_id * @param string $email_address * * @return boolean */ public function list_has_subscriber($list_id, $email_address) { $data = $this->api->get_list_member($list_id, $email_address); return !empty($data->id) && $data->status === 'subscribed'; }