PHPDI

PHPDI is a lightweight dependency injection container for PHP. It aims to simplify the management of dependencies within a PHP application by providing a structured way to declare, instantiate, and inject objects. The primary goal of PHPDI is to promote loose coupling and improve the testability of code.

At its core, PHPDI operates by defining services and their configurations. These definitions can be stored in configuration files, often written in PHP arrays or using a dedicated configuration language. When a service is requested, PHPDI resolves its dependencies based on these definitions and injects them automatically. This process eliminates the need for developers to manually create and wire up complex object graphs, a common challenge in larger projects.

Key features of PHPDI include its ability to handle constructor injection, setter injection, and method call injection. It supports lazy instantiation, meaning services are only created when they are actually needed, which can improve performance. PHPDI is also designed to be framework-agnostic, allowing it to be integrated into various PHP projects and frameworks. Its small footprint and focus on core dependency injection principles make it a straightforward choice for developers seeking a no-frills DI solution. The container can be extended with custom compilers and processors to further tailor its behavior to specific application needs.