doctrine/common

Doctrine Common is a set of shared libraries that provide foundational capabilities for parsing PHP docblock annotations, managing event-driven communication, and handling typed object collections. At its core, it includes a docblock annotation parser that reads structured metadata from PHP docblock comments, enabling configuration for object-relational mapping and validation rules. It also offers a typed collection abstraction with lazy-loading support, allowing efficient management of object groups through array-like operations.

The library extends these capabilities with an event management system that dispatches and listens to named events, enabling decoupled communication between application components. It includes tools for resolving annotation class names from docblock strings, tokenizing docblock text into parseable tokens, and extracting class metadata from annotations to drive configuration. The collection system provides grouping and lazy-loading proxy patterns to defer element loading until access, improving performance with large datasets.

Additional features include event subscription management for dynamic attachment and detachment of handlers, and a typed collection manager that wraps arrays with methods for iteration and filtering. The documentation covers installation and usage of these components as standalone libraries within the Doctrine ecosystem.