public function findAnsweredUserIdList($optionId, $usersContext = null, $count = null) { if ($usersContext === null) { $answers = $this->answerDao->findList($optionId, $count); } else { $answers = $this->answerDao->findListWithUserIdList($optionId, $usersContext, $count); } $out = array(); foreach ($answers as $item) { $out[] = $item->userId; } return $out; }