The DependencyInjection component allows you to standardize and centralize the way objects are constructed in your application.
The dependency injection container for humans
A small PHP dependency injection container
Small but powerful dependency injection container
Dice - a lightweight Dependency Injection Container for PHP
Flexible, compiled and full-featured Dependency Injection Container with perfectly usable autowiring and support for all new PHP 7 features.
Library for testing user classes related to the Symfony Dependency Injection Component
Dependency Injection System
An introduction to Dependency Injection.