PKPStageParticipantNotifyForm::execute PHP Method

    function execute($request)
    {
        $submissionDao = Application::getSubmissionDAO();
        $submission = $submissionDao->getById($this->_submissionId);
        foreach ((array) $this->getData('userIds') as $userId) {
            $this->sendMessage($userId, $submission, $request);
        }
        return parent::execute($request);
    }