Goal: After reading this tutorial Magento 2 How to get all xml loaded tree , you can output any layout xml file of any page in magento 2.
Sometime you have a desire to print all xml loaded tree to check whether your custom xml handles are loaded or not ?
For this purpose, I have written a simple module to print all xml loaded tree in a xml file, so checking your custom module xml is more easily.

The general ideas of this extension :

  • We listen to an event “layout_generate_blocks_after” and get all loaded tree from that point.
  • Save all loaded tree to an xml file.

It sounds easily right ? Here is how we create it.

The module we will create like the below image:




  1. We create a new directory Thienphucvx/Dev.
  2. Create Thienphucvx/Dev/registration.php to declare with Magento 2 about our module directory.
  3. Create Thienphucvx/Dev/etc/module.xml : To let Magento 2 know about setup version of our module
    <?xml version="1.0"?>
    <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="module.xsd">
        <module name="Thienphucvx_Dev" setup_version="1.0.0" schema_version="1.0.0" release_version="1.0.1">
  4. Create Thienphucvx/Dev/etc/fronted/event.xml. In this file, we will listen to event “layout_generate_blocks_after
    <?xml version="1.0" encoding="UTF-8"?>
    <config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Event/etc/events.xsd">
        <event name="layout_generate_blocks_after">
            <observer name="thienphucvx_layout_generate_blocks_after" instance="Thienphucvx\Dev\Model\Layout" />
  5. Create Thienphucvx/Dev/Model/Layout.php with the content as below
     * Copyright © 2015 Thienphucvx.com. All rights reserved.
    namespace Thienphucvx\Dev\Model;
    use Magento\Framework\Event\Observer;
    use Magento\Framework\Event\ObserverInterface;
    class Layout  implements ObserverInterface
        protected $_logger;
        public function __construct ( \Psr\Log\LoggerInterface $logger
        ) {
            $this->_logger = $logger;
        public function execute(\Magento\Framework\Event\Observer $observer)
            $xml = $observer->getEvent()->getLayout()->getXmlString();
            $writer = new \Zend\Log\Writer\Stream(BP . '/var/log/layout_block.xml');
            $logger = new \Zend\Log\Logger();
            return $this;
  6. Set up module
    In your home website directory. enter CMD command line:
    – php bin/magento module:enable Thienphucvx_Dev
    – php bin/magento setup:upgrade
  7. Refresh the page that you want to see xml file (for example: your home page)  and check your handle xml file  in var/log/layout_block.xml .

Happy coding ! If you have any questions, please let me know.