app\controllers\TasksController::actionGetOutput PHP Method

    public function actionGetOutput()
    {
        if (isset($_POST['task_run_id'])) {
            $run = TaskRun::findOne($_POST['task_run_id']);
            /**
             * @var TaskRun $run
             */
            echo htmlentities($run->getOutput());
        } else {
            echo 'empty task run id';
        }
    }