Container
A small but powerful PSR-11 compliant dependency injection container for PHP applications.
What is Container?
Container is a dependency injection container for PHP that manages class dependencies and implements the PSR-11 standard. It provides a standardized way to handle object creation and dependency resolution in PHP applications, promoting loose coupling and testable code. The container supports autowiring, service providers, and delegation while maintaining a lightweight footprint.
PHP developers building applications that benefit from dependency injection, particularly those working with frameworks or libraries that follow PSR standards. It's ideal for developers who want a standardized, interoperable container solution.
Developers choose Container because it's PSR-11 compliant, ensuring compatibility with other PHP-FIG standards, while remaining small and focused. It provides essential dependency injection features without the complexity of larger framework-specific containers.
Overview
Small but powerful dependency injection container
Use Cases
Best For
- Implementing dependency injection in PSR-compliant PHP applications
- Managing service dependencies in modular PHP architectures
- Creating testable PHP code with loose coupling
- Building interoperable PHP libraries that require dependency injection
- Migrating from framework-specific containers to standards-based solutions
- Setting up service providers for organized dependency management
Not Ideal For
- Projects already using a full-stack PHP framework with a mature DI container, such as Laravel or Symfony, where switching adds integration complexity with little benefit.
- Simple CLI scripts or small web applications where dependency injection introduces unnecessary abstraction and performance overhead.
- Teams requiring extensive out-of-the-box integrations with third-party libraries or graphical tools for dependency management.
Pros & Cons
Pros
Implements PSR-11 ContainerInterface, ensuring seamless interoperability with other PHP-FIG compliant components, as highlighted in the README's compliance notes.
Supports autowiring, manual configuration, and various definition methods, allowing for both convention-over-configuration and explicit control based on project needs.
Enables organization of service definitions into reusable provider classes, promoting clean separation of concerns and easier maintenance in large applications, as mentioned in the key features.
Facilitates complex dependency hierarchies by allowing containers to delegate resolution to other containers, ideal for microservices or modular architectures.
Cons
Unlike framework-integrated DI containers, it requires developers to set up and configure everything from scratch, which can be time-consuming for new or rapid-prototyping projects.
As a standalone library, it lacks the extensive community plugins, IDE integrations, and graphical management tools available with framework-specific containers like those in Laravel or Symfony.
Full documentation is hosted separately and must be referenced externally, which might not always be as up-to-date or integrated as inline documentation in larger frameworks.
Frequently Asked Questions
Related Projects
Symfony DIAllows you to standardize and centralize the way objects are constructed in your application
AurynIoC Dependency Injector
Aura.DiDependency Injection System
AcclimateAdapters for PHP framework containers to an interoperable interface
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