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Handlr Backend

A lightweight PHP middleware-style framework built around the Pipe + Handler pattern.

📖 Documentation: https://phillipsharring.github.io/handlr-mono/backend/

Installation

For a ready-to-go project structure, scaffold a full app with composer create-project phillipsharring/handlr-app (see the app skeleton).

Architecture

Handlr separates HTTP concerns from business logic:

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

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

What's Included

Core

• Request / Response - HTTP abstractions
• Router / RouteGroup - routing with middleware pipelines and {param:type} constraints
• Kernel - request dispatcher
• Container - dependency injection with singleton/bind patterns
• EventManager - synchronous pub/sub

Database

• Db - lazy PDO wrapper with transaction support
• NullDb - throws on query (for simulation/test modes)
• Table - CRUD base class (insert, update, delete, findWhere, findById, paginate)
• Record - domain object base class with UUID support
• Query - read-only query base class (rows, row, scalar, count, column)
• MigrationRunner / Seeder - database lifecycle

Auth & Security

• AuthContext - request-scoped user identity holder
• AuthorizationService - RBAC permission checking via injectable PermissionsProviderInterface
• AuthSubject / AuthorizedUser - authenticated user contract and implementation
• Session-based auth pipes: StartSessionPipe, SessionAuthPipe, RequireAuthPipe
• Permission guard pipes: RequirePermissionPipe, RequireAllPermissionsPipe
• CsrfService - token generation, validation, and rotation
• CSRF pipes: EnsureCsrfTokenPipe, VerifyCsrfTokenPipe
• CorsPipe / VerifyOriginPipe - origin validation

Validation

• Validator with rule strings ('string|min:3', 'int|min:1,max:50')
• 20+ built-in rules, 9 sanitizers
• ValidatedInputFactory - pipe-to-handler validation bridge

API

• Presenter - response envelope builder (success, error, validation error formatting)

Utilities

• SortableList trait - column sort extraction and meta generation
• TreeSortKeyService - hierarchical sort key computation with locking
• Logger - file-based PSR-3 logger

Code Generation

• make:migration, make:seeder, make:record, make:table, make:handler, make:pipe, make:scaffold

Standard Pipes

Quick Example

Requirements

• PHP >= 8.4
• PDO extension

License

MIT