NetteDI

NetteDI, also known as Nette Dependency Injection, is the dependency injection container component of the Nette Framework, a PHP web framework. It provides a runtime container for instantiating and wiring objects by declaring services and their dependencies, enabling inversion of control and centralized configuration of object lifetimes.

Core concepts include service definitions, parameters, and the ability to configure services through NEON or PHP code using compiler extensions. The container is built by a compiler that translates definitions into optimized PHP code, allowing fast service resolution at runtime.

Autowiring and factories are supported: type hints can be used to automatically resolve dependencies, while factory services create objects on demand. Definitions can be marked as shared (singleton) or created on demand, and can be decorated or tagged to integrate with other parts of the framework or extensions.

Usage in Nette projects typically involves configuring services in a config file and letting the compiler build a container during application bootstrap. Classes receive dependencies through constructor injection, and optional annotations or extension configurations enable more advanced wiring.

Architecture and ecosystem: The DI container consists of the Container class, a Compiler that produces optimized PHP, and CompilerExtension classes that modify the container schema. NetteDI integrates with other framework components but can also be used standalone in PHP projects.

See also: Nette Framework, Dependency injection, NEON, Autowiring.