Observer
With observers you can hook in on events fired by Magento or other third party modules. For creating an observer we need the event name and the scope:
- Event name: Name of event you want to observe, example: catalog_product_save_after
- Scope: For which scope the observer is active.
- All: Observer is always active
- Frontend: Observer is only active in the frontend of Magento.
- Backend: Observer is only active in the admin panel of Magento.
Some events:
- sales_order_place_before
- sales_order_place_after
- checkout_cart_product_add_after
- checkout_cart_update_items_before
- checkout_cart_save_before
- catalog_product_get_final_price
Use the snippet in the Magento 2 module creator.
Files
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="Test">
<observer name="mage2gen_module_observer_test_Test" instance="Mage2Gen\Module\Observer\Test"/>
</event>
</config>
Observer/Test.php
<?php
declare(strict_types=1);
namespace Mage2Gen\Module\Observer;
class Test implements \Magento\Framework\Event\ObserverInterface
{
/**
* Execute observer
*
* @param \Magento\Framework\Event\Observer $observer
* @return void
*/
public function execute(
\Magento\Framework\Event\Observer $observer
) {
//Your observer code
}
}
