Backend Overview

Draft

This page is a stub. Content coming.

handlr-backend is a lightweight PHP middleware-style framework built around the Pipe + Handler pattern. It separates HTTP concerns from business logic.

• Pipe — middleware that sees Request/Response. Auth, validation, CORS, CSRF.
• Handler — pure business logic. Receives typed HandlerInput, returns HandlerResult. No HTTP awareness.
• HandlerInput — validated input object. Identical for HTTP requests and event listeners.
• HandlerResult — structured result: $this->result->ok($data) or $this->result->fail($errors).

Below the Pipe layer, everything is Handler/HandlerInput — whether it came from HTTP or an event dispatch.

To cover

• The request lifecycle (Kernel → Router → Pipeline → Handler)
• Dependency injection & the container
• Where each abstraction lives and why