Ttdfjt

I am planing to create a web hook in Magento through which Magento will send a alert to the destination upon placing an order using web hook.

First thing there is no web hooks available in Magento.
Magento call them Event Observer.

What is an Event: An event can be any action Or state in magento like customer_register_success, sales_order_place_after etc.

What is an Observer: An Observer is a PHP class which listen to events, when events get fire Observer class get activated.

For example we need order details when order get placed.We are going to create a custom module for this say Pawanist_Orderdata

Create following files for module:

app/code/Pawanist/Orderdata/registration.php

<?php
MagentoFrameworkComponentComponentRegistrar::register(
MagentoFrameworkComponentComponentRegistrar::MODULE,
'Pawanist_Orderdata',
__DIR__
);

app/code/Pawanist/Orderdata/etc/module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
 <module name="Pawanist_Orderdata" setup_version="1.0.1">
 </module>
</config>

app/code/Pawanist/Orderdata/etc/events.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
<event name="sales_order_place_after">
 <observer name="sales_pawanist_orderdata" instance="PawanistOrderdataObserverGetOrderData" />
</event>
</config>

app/code/Pawanist/Orderdata/Observer/GetOrderData.php

<?php

namespace PawanistOrderdataObserver;

use MagentoFrameworkEventObserverInterface;
use PsrLogLoggerInterface;

class GetOrderData implements ObserverInterface

 protected $logger;

 public function __construct(LoggerInterface$logger) 
 $this->logger = $logger;
 

 public function execute(MagentoFrameworkEventObserver $observer)
 
 try 
 $order = $observer->getEvent()->getOrder();

 $total = $order->getGrandTotal();//this will log order total
 $this->logger->info($total);

 catch (Exception $e) 
 $this->logger->info($e->getMessage());
 
 

After creating module, you need to activate module using:

- php bin/magento setup:upgrade
- php bin/magento cache:flush
- php bin/magento setup:static-content:deploy (only required in production mode)

Hope above will help!

You have to use the Magento Observer feature here and use event sales_order_place_after

You can follow this link to implement this
https://meetanshi.com/blog/get-order-data-from-magento-2-sales_order_place_after-event/

Try this Webhook module https://www.mageplaza.com/magento-2-webhook/
After creating order, it will send a hook request to any endpoints.