A module is needed for your custom code to run in magento. Say you want to change some magento code or add your own code. you need a module. This is best practice and this is how a module works.

Below steps creates a dummy module called AzCodez_MagentoTraining

• Create a folder app/code/AzCodez/MagentoTraining

• Create a file app/code/AzCodez/MagentoTraining/etc/module.xml

• Add code below

<?xml version="1.0"?>
<!-- Module AzCodez_MagentoTraining -->
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="AzCodez_MagentoTraining" setup_version="0.0.1">
        <!-- Add modules that this module dependent on 
        <sequence>
            <module name="Magento_Catalog"/>
        </sequence>
        -->
    </module>
</config>

• Add a registration file app/code/AzCodez/MagentoTraining/registration.php
• Add code below

<?php
/**
 * Module AzCodez_MagentoTraining
 */
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'AzCodez_MagentoTraining',
    __DIR__
);

• Run following commands from your root folder

  php bin/magento setup:upgrade 
  php bin/magento module:enable AzCodez_MagentoTraining
  

  • If you are running Magento cloud run

    docker-compose run --rm deploy cloud-deploy
    docker-compose run --rm deploy magento-command module:enable AzCodez_MagentoTraining
    

• If you get 'No modules were changed.' Your module is now installed!

• Double check its installed properly by searching AzCodez_MagentoTraining in your app\etc\config.php

• If you get error module not found

  • Double check where you put the module.xml and registration.php
  • module.xml goes under etc folder and registration goes in root of MagentoTraining folder

• Now you can create your own module by Modifing 'AzCodez' and 'MagentoTraining' in above instructions to your own preference

If this didn't please comment and I will try help you.

Remember to like, post a comment and share this blog if this worked for you.

Happy Coding :)

Asrin

If this helped you consider buying me a coffee :)

References

• See Link to relevant Magento Docs for more information
• Image from - repository-images.githubusercontent.com/288..