How can I get the data when I click the place order button on the checkout page of the magento 2?

Question

How can I get the data when I click the place order button on the checkout page of the Magento 2? When clicking button place order, show the output data like var_dump ($data); die (); so as not to redirect to checkout success. Thank you so much.

Answer 1

Use this extension and modify as per your requirement.
1 https://github.com/navinbhudiya/magento2-order-details-on-success-page
2 https://bsscommerce.com/magento-2-order-details-on-success-page.html

Answer 2

Following class is responsible for placing the order.

vendor/magento/module-checkout/Model/PaymentInformationManagement.php

And method:

savePaymentInformationAndPlaceOrder

You can debug here. This is api class and you can't get data as $data. All data are passes here as an object.

Also, you can throw an exception here for avoiding success page.