How to get the actual value of a variable?

Question

Yii

The model has a $myVar variable. When a get request is received before a response is received, it is incremented, then passed to the controller and to views.
Added a form with Pjax

<?php Pjax::begin(); ?>
            <?= Html::beginForm('statistics', 'get', ['data-pjax' => '']) ?>
            <?= Html::input('text', 'ownerId') ?>
            <?= Html::submitButton('Отправить', ['class' => 'flat_button secondary']) ?>
            <?= Html::endForm() ?>
            <?= $myVar ?>
        <?php Pjax::end(); ?>

Added show loader while Pjax request is in progress.
js file:

$(document).ready(function() {
    $('.loader').hide()

    $(document).on('pjax:send', function() {
        $('.loader').show()
    })

    $(document).on('pjax:success', function() {
        $('.loader').hide()
    })
});

The question is how to pass the current value of the myVar variable to the View while the ajax get request is in progress?

Answer 1

How to pass PHP variable to JS variable?

<script>
var myJsVar = <?= $myPhpVar ?>;
</script>

How to pass PHP variable directly to ajax request?
<?= Html::input('hidden', $myPhpVar) ?>