Magento2: how to debug in sales_order_place_after event

Question

registration.php

 <?php
    \Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Hafiz_Sms',
    __DIR__
    );

etc/events.xml

<?xml version="1.0"?>
<configxmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
<eventname="sales_order_place_after">
<observername="place_order_after" instance="Hafiz\Sms\Observer\Orderplaceafter" />
</event>
</config>

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="Hafiz_Sms" setup_version="2.1.1"></module>
</config>

Observer/Orderplaceafter.php

<?php
namespace Hafiz\Sms\Observer;
use Magento\Framework\Event\ObserverInterface;
use Psr\Log\LoggerInterface;
class Orderplaceafter implements ObserverInterface
{
protected $logger;
public function __construct(LoggerInterface$logger) {
$this->logger = $logger;
}
public function execute(\Magento\Framework\Event\Observer $observer){
  $order = $observer->getEvent()->getOrder();
  echo $orderId = $order->getId();
//  $comment = $this->getRequest()->getParam('comment');
  print_r("Catched event succssfully !"); exit;
}
}

But it's not working. How to debug in this event?. Kindly suggest me where i am wrong?

Answer 1

The event will be defined at etc/events.xml Nor etc/event.xml.Seems file name is wrong.

events.xmlcode will be like.Also, the Syntax of declare event is wrong. Please used below code:

<?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="place_order_after" instance="Hafiz\Sms\Observer\Orderplaceafter" />
    </event>
</config>

Follow this article for how to implement event at module https://devdocs.magento.com/guides/v2.2/extension-dev-guide/events-and-observers.html.

Forgetting purpose, don't use print_r, die and exit. Use Magento loggger for print for debugging Magento 2: Replacement for Mage::log method?

Answer 2

Yes, it is an interesting question. Many people may know about sales_order_place_after event.

If you use this event, you can't use print_r() and exit() function.

Otherwise, kindly use checkout_onepage_controller_success_action event. It will a helpful lot

Answer 3

You declared event name and observer name as observername and eventname.

<?xml version="1.0"?>
<configxmlns: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="place_order_after" instance="Hafiz\Sms\Observer\Orderplaceafter" />
</event>
</config>