How to implement different behavior on different Submits in PJAX wrapped form?

Question

Yii

There is a one field form wrapped with pjax and two submit buttons - Add and Replace.
I tried to specify name / value, formaction for buttons - the desired effect was not achieved - the form action is executed, name / value, formaction do not affect the data transmitted to the controller.
It is necessary to pass different values ​​of myParam, depending on the button.
The user input elements are omitted in the code example.

Pjax::begin([
    'enablePushState' => false, 
    'timeout'=> 5000,
    'id'=> 'pjax1',
    'submitEvent' => 'submit',
    'formSelector' => '#'.'form1'
    ]);

$form = ActiveForm::begin([
    'id' => 'form1',
    'action' => Url::to(['my-controller/work1']),
    'options' => [
        'data-pjax' => 'pjax1'
            ]
    ]);

$ParamsInput = [];
$ParamsInput['class'] = 'btn btn-success';
$ParamsInput['formaction'] = Url::to(['my-controller/work1', 'myParam' => false]);
echo Html::submitButton('Добавить', $ParamsInput);

echo Html::hiddenInput('myParam', false);
$ParamsInput['name'] = 'myParam';
$ParamsInput['value'] = 'true';
$ParamsInput['formaction'] = Url::to(['my-controller/work1', 'myParam' => true]);
echo Html::submitButton('Заменить', $tmpParamsInput);

ActiveForm::end(); 
Pjax::end();

Answer 1

Controller

public function actionIndex()
    {
        if(Yii::$app->request->isAjax){
            if(Yii::$app->request->post('myParam') == 1){
                $param = 'Ответ сервера - ' . Yii::$app->request->post('myParam');
            }
            else{
                $param = 'Ответ сервера - ' . Yii::$app->request->post('myParam');
            }
            return $this->asJson($param);
        }

        return $this->render('index');
    }

View

<?php
$form = ActiveForm::begin([
    'id' => 'form1',
    'action' => Url::to(['images/index']),
    'options' => [
        'data-pjax' => 'pjax1'
    ]
]);

echo Html::submitButton('Добавить', ['data' => ['param' => 1]]);

echo Html::hiddenInput('myParam', false);

echo Html::submitButton('Заменить', ['data' => ['param' => 0]]);

ActiveForm::end();
?>
<div id="result"></div>
<?php
$this->registerJs("
  $('button').on('click', function(e){
     e.preventDefault();
     var url = $(this).closest('form').attr('action');
     var param = $(this).attr('data-param')
     $.ajax({
       url: url,
       type: 'POST',
       data: {myParam: param},
       success: function(data){
          $('#result').text(data)
       }
     })
  })
")
?>

Answer 2

An html form cannot have 2 different actions.
You can make the same name and different value for 2 submitButton

<input type="submit" name="action" value="Update" />
<input type="submit" name="action" value="Delete" />

In the controller, resolve based on this parameter.