Magento, implement an event/observer pattern like any good Object Oriented System for the end user. In Magento Some of the  action happen during any page request ( any model serve, any user logs in etc..) , for such magento issued an event signal. So when you create your own module, you can listen for the same events.

So lets clear it with example:

let’s assume that you wanted to get an email notification every time when any user logged into your store, in that case you could listen for the “user_login” event in the config.xml

Config.xml

<events>
    <user_login>
      <observers>
          <observer_name>
             <type> Singleton </type>
             <class> myModule/Observer </class>
             <method>loginNotification </method>
          </observer_name>
      </observer>
   </user_login>
</events>  

and then write below code inside “app/code/vendorName/myModule/Model/Observer.php”

Observer.php

<?php
class Gs_Searchtap_Model_Observer extends Varien_Event_Observer
{

public function loginNotification($observer)

{

$data= $observer->getData();

// Now your stuff here to check user data;

}

}

Happy Coding 🙂

Praveen Maurya

Praveen Maurya work in e-commerce domain having knowledge of Plugin development in Magento 1.x/2.x, Drupal, Woo-Commerce, PrestaShop, Opencart and other e-commerce solution. When he is not engrossed with anything related to these, he loves to explore new things.

http://praveen.itechinsiders.com/