Kdjykuj

How will final result should looks like for this implementation.
Thank you

file location: /vendor/magento/module-checkout/Controller/Onepage/Success.php

below is my default Success.php for Magento 2.1

> <?php /**  *  * Copyright © 2016 Magento. All rights reserved.  * See COPYING.txt for license details.  */ namespace MagentoCheckoutControllerOnepage;



class Success extends MagentoCheckoutControllerOnepage {

    /**

     * Order success action

     *

     * @return MagentoFrameworkControllerResultInterface

     */

    public function execute()

    {

        $session = $this->getOnepage()->getCheckout();

        if (!$this->_objectManager->get('MagentoCheckoutModelSessionSuccessValidator')->isValid()) {

            return $this->resultRedirectFactory->create()->setPath('checkout/cart');

        }

        $session->clearQuote();

        //@todo: Refactor it to match CQRS

        $resultPage = $this->resultPageFactory->create();

        $this->_eventManager->dispatch(

            'checkout_onepage_controller_success_action',

            ['order_ids' => [$session->getLastOrderId()]]

        );

        return $resultPage;

    } }

............................ where do i paste this code on Success.php

<script>
window.renderOptIn = function() {
window.gapi.load('surveyoptin', function() {
window.gapi.surveyoptin.render(
{
"merchant_id": XXXXXXXXX,
"order_id": "<?php echo $order->getIncrementId() ?>",
"email": "<?php echo $order->getCustomerEmail() ?>",
"delivery_country": "<?php echo $order->getShippingAddress()->getCountryId() ?>",
"estimated_delivery_date": "YYYY-MM-DD"
});
});
}
</script>

I think you would use the file located at or whatever the vendor/template you use

vendor/magento/module-checkout/view/frontend/templates/success.phtml

In which case, you would put the google code after the last in the success.phtml file

You need to put this code in vendor/magento/module-checkout/view/frontend/templates/success.phtml.

<?php

/**

 * Copyright © Magento, Inc. All rights reserved.

 * See COPYING.txt for license details.

 */



// @codingStandardsIgnoreFile



?>

<?php /** @var $block MagentoCheckoutBlockOnepageSuccess */ ?>

<div class="checkout-success">

    <?php if ($block->getOrderId()):?>

        <?php if ($block->getCanViewOrder()) :?>

            <p><?= __('Your order number is: %1.', sprintf('<a href="%s" class="order-number"><strong>%s</strong></a>', $block->escapeHtml($block->getViewOrderUrl()), $block->escapeHtml($block->getOrderId()))) ?></p>

        <?php  else :?>

            <p><?= __('Your order # is: <span>%1</span>.', $block->escapeHtml($block->getOrderId())) ?></p>

        <?php endif;?>

            <p><?= /* @escapeNotVerified */ __('We'll email you an order confirmation with details and tracking info.') ?></p>

    <?php endif;?>



    <?= $block->getAdditionalInfoHtml() ?>



    <div class="actions-toolbar">

        <div class="primary">

            <a class="action primary continue" href="<?= /* @escapeNotVerified */ $block->getContinueUrl() ?>"><span><?= /* @escapeNotVerified */ __('Continue Shopping') ?></span></a>

        </div>

    </div>

</div>

<script>

    window.renderOptIn = function() {

        window.gapi.load('surveyoptin', function() {

            window.gapi.surveyoptin.render(

            {

                "merchant_id": XXXXXXXXX,

                "order_id": "<?php echo $order->getIncrementId() ?>",

                "email": "<?php echo $order->getCustomerEmail() ?>",

                "delivery_country": "<?php echo $order->getShippingAddress()->getCountryId() ?>",

                "estimated_delivery_date": "YYYY-MM-DD"

            });

        });

    }

</script>

app/design/frontend/magento/theme/Magento_Checkout/templates/success.phtml

Add this script

<script>



  window.renderOptIn = function() {



  window.gapi.load('surveyoptin', function() {



  window.gapi.surveyoptin.render(



    {



      "merchant_id": xxxxxxxxx,



      "order_id": "<?php echo $orderData->getIncrementId() ?>",



      "email": "<?php echo $orderData->getCustomerEmail() ?>",



      "delivery_country": "<?php echo $orderData->getShippingAddress()->getCountryId() ?>",



      "estimated_delivery_date": "YYYY-MM-DD"



    });



 });



 }



</script>