Yii1 Ajax request how to write?

Question

JavaScript

Project on Yii1.
Did according to this example , but for some reason even the form cannot be displayed. Because it throws an error that the variable $input = $_POST['input'] is not defined. I just used it for testing purposes.

I’m doing statistics in the admin panel and I wanted to fasten the ajax select option to display for the day, month, year, all the time - I wrote the selection logic itself, working with dates and queries on the models, but I don’t know how to update via Ajax. Does anyone have a complete working example? At least to understand how it works in conjunction with yii?

on Yii2 I did in a similar way

//views
$.ajax({
       url: '<?php echo Yii::$app->request->baseUrl. '/controller/Some' ?>',
       type: 'post',
       data: {
                 someValue: $("#someValue").val() , 
                 _csrf : '<?=Yii::$app->request->getCsrfToken()?>'
             },
       success: function (data) {
          console.log(data.result);
       }
  });

//контроллер
public function actionSome()
{
if (Yii::$app->request->isAjax) {
    $data = Yii::$app->request->post();
   // вытаскиваем из запроса данные и выполняем логику и оформляем ответ
    $result = //ответ
    \Yii::$app->response->format = \yii\web\Response::FORMAT_JSON;
    return [
        'result' => $result,
        'code' => 100,
    ];
  }
}

Actually, according to the documentation, I rustled, I didn’t find anything intelligible. Is this done somehow differently on Yii1?