#Application Foundation

This page is a navigation hub. Its original content has been split into focused pages — each topic now lives in the best place for it.

#Controllers & routing

• Routing — registering routes, groups, named routes, middleware, return-value normalisation.
• Attribute Routing — #[Get], #[Post], #[Group], #[Middleware] on controller methods.
• Handler types — closures, [Class, 'method'], invokable classes.

#HTTP

• Request — reading input, params, headers, cookies, file uploads.
• Response — JSON, HTML, redirects, streaming, cookies.
• Form Requests — typed, validated request objects.
• JSON Resources — shaping API output.
• Server-Sent Events — streaming server push.
• HTTP Client — making outbound HTTP requests.

#Views & sessions

• Views — PHP templates, layouts, sections, partials, asset URLs, view caching.
• Sessions — file, Redis, database, and array drivers; flash messages.

#Error handling

• Errors — exception hierarchy, onError, onException, HTTP exceptions.
• Debug Toolbar — toolbar, exception pages, SQL/log wiring for local development.

#Data

• Database — Connection, QueryBuilder, Schema, Migrator, Model, SoftDeletes, pessimistic locks, advisory locks.
• Validation — all rules, custom rules, FormRequest, ValidationException.
• Collections — Collection helper with full method reference.
• Cache — ArrayCache, RedisCache with HMAC signing, PSR-16 adapter.
• Filesystem — LocalFilesystem, Storage facade, upload patterns.
• Redis — RedisClient, raw protocol client, testing fakes.

#Security

• Security Middleware — CORS, CSRF, Rate Limiting, Security Headers.
• JWT — sign/verify, middleware, refresh-token pattern.
• Cryptography — AES-256-GCM encryption, Argon2id hashing, HMAC signing.

#Services

• Queues — jobs, drivers, workers, retries, failed-job tracking.
• Events — PSR-14 dispatcher, listeners, model lifecycle events.
• Logging — handlers, formatters, PSR-3 integration.
• Console — CLI commands, generators, the worker command.
• Localization — translations, pluralization, locale switching.
• JSON-RPC 2.0 — batch requests, method routing, error codes.
• OpenAPI — generating specs from attributes and doc-blocks.
• Async (Fibers) — cooperative concurrency with PHP 8.1 fibers.

#Reference

• Configuration — environment variables, .env, config arrays.
• UUID & ULID — v4, v7, ULID, binary encoding.
• DI Container — bindings, singletons, auto-wiring, contextual binding.
• Testing — TestCase, TestResponse, request helpers.
• Framework Comparison — Lift vs Slim vs Lumen vs Laravel Micro.