This document discusses how Composer can be used to manage dependencies and autoloading in Magento 1.x and Magento 2 projects. It explains how Composer works, including the composer.json file, vendor directories, and version control. It also covers how Magento 1.x and 2 leverage Composer differently, with Magento 2 fully supporting Composer and PSR-4 autoloading for modules, themes, and locales.

1. Magento 2 &
Composer

2. About Me
Manuele Menozzi
CTO @ Webgriffe
Magento Certified Developer
Zend Certified PHP Engineer
Over 6 years of real-life experience with Magento

3. A Dependency Manager for PHP
The

4. ./composer.json
How it Works {
“require”: {
“acme/lib-a”: “1.1.2”,
“acme/lib-b”: “2.*”
}
}
https://packagist.org/
$ composer install
./vendor/acme/lib-a
./vendor/acme/lib-b
./vendor/other/lib-a-dependency
./composer.lock
./vendor/autoload.php

5. Versioning, Deployment & Composer
Put under version control composer.json
and composer.lock files
Ignore from version control the vendor
directory
Combine your VCS system with Composer
in your deployment process

6. Composer & Magento 1.x
./composer.json
./composer.lock
./vendor/
├── autoload.php
├── acme/
│ ├── lib-a/
│ └── lib-b/
└── other/
└── lib-a-dependency/
./app/
├── code/
│ ├── community/
│ ├── core/
│ └── local/
├── design/
├── etc/
│ └── modules/
./skin/

7. Magento 1.x Solution
Magento Composer Installer
Works but…
VCS ignore repetitive work
Same class defined in two files issues
Hard to maintain related upstream

8. ./index.php
./app/bootstrap.php
./app/autoload.php
./vendor/autoload.php
Magento 2
Universal Autoloading

9. Magento 2
Self-Contained Packages
Module -> app/code/Vendor/Module
Theme -> app/design/Vendor/theme
Locale -> app/i18n/vendor/package_name

10. Magento 2
Component Registrar
any/path/of/your/choice/registration.php
use MagentoFrameworkComponentComponentRegistrar;
ComponentRegistrar::register(
ComponentRegistrar::MODULE,
'VendorName_ModuleName',
__DIR__
);
or ::THEME
or ::LANGUAGE
or ‘frontend/Vendor/theme’
or ‘vendor_it_it’

11. Magento 2
Component Registrar Loading
vendor/magento/braintree/composer.json
...
“autoload”: {
“files”: [“registration.php”],
“psr-4”: {“MagentoBraintree”: “”}
}
...

12. Code Reuse
Better Code

13. thanks!
Any questions?
You can find me at
@mmenozzi
http://mmenozzi.github.io/