OnExtensionAfterInstall usage example

Example Plugin

php
<?php
defined('_JEXEC') or die;

use Joomla\CMS\Plugin\CMSPlugin;
use Joomla\CMS\Application\CMSApplication;

class PlgExtensionExample extends CMSPlugin
{
    public function onExtensionAfterInstall($installer, $eid)
    {
        // Get the extension type (component, module, plugin, etc.)
        $type = $installer->get('type');

        // Get the extension name
        $name = $installer->get('name');

        // Perform some action after the extension is installed
        $app = CMSApplication::getInstance('site');
        $app->enqueueMessage("The $type '$name' has been installed.", 'success');
    }
}

This example plugin listens for the onExtensionAfterInstall event and when triggered, it retrieves the type and name of the installed extension, then displays a success message in the Joomla site application.[1][2][4]

The onExtensionAfterInstall event provides the $installer object, which contains information about the installed extension, such as its type, name, and other metadata. This allows you to perform custom actions based on the installed extension.[3][5]