What are some best practices for API versioning and documentation in PHP-based RESTful APIs?

API versioning is essential for backward compatibility. I recommend using URL versioning (e.g., /v1/resource) or using headers (Accept-Version). For documentation, tools like Swagger or API Blueprint are handy. Document endpoints, request/response formats, and provide examples. Keeping documentation up-to-date and accessible to the team and external developers ensures smooth API usage and integration.