Module is backbone of Magento 2, Module having collection of Controllers, Models, Blocks, Helpers, Layouts, Templates, Plugins, Observer etc. These ineract with each other as well as ineract with
Magento 2 exisiting functionalities in order to add a specific feature to a Magento 2 application.
There are following below steps need to follow to create Magento 2 custom module.
Step [1] – Nominate Module Name :: Syntax as below
Namespace_Modulename or Vendorname_Modulename
Namespace(Vendorname) always must be unique.
Step [2] – Create a new directory for the custom module
Syntax as below
Namespace / ModuleName or Vendorname / ModuleName
Step [3] – Create a module’s registration file :: This file name is registration.php & used to registered module.
Syntax as below
<?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'Namespace_Modulename',
__DIR__
);Namespace = Mage2db
Modulename = John
<?php
\Magento\Framework\Component\ComponentRegistrar::register(
\Magento\Framework\Component\ComponentRegistrar::MODULE,
'Mage2db_John',
__DIR__
);Briefly Explain registration.php
Step [4] – Create a module’s naming configuration file :: This file name is module.xml & used to define module name ( Namespace_Modulename ) as well as store module into database table setup_module
Syntax as below
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Namespace_Modulename" setup_version="3.0.1"/>
</config>Namespace = Mage2db
Modulename = John
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
<module name="Mage2db_John" setup_version="3.0.1"/>
</config>The schema_version is no longer required since releasing Magento 2.3.3
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