PSR Compliance

Each row is covered by a test (tests/Unit/PsrComplianceTest.php) and the coding standard is enforced by phpcs in CI.

PSR	Standard	Where
1	Basic Coding Standard	enforced with phpcs (part of the PSR-12 ruleset)
3	Logger	Log\FileLogger and the channel loggers; the container serves LoggerInterface
4	Autoloading	Naluz\ → src/, App\ → app/, Database\Factories\ and Database\Seeders\
6	Caching Interface	Cache\Psr6\CacheItemPool, an adapter over any PSR-16 cache
7	HTTP Message	via nyholm/psr7. Naluz\Http\Response extends the Nyholm response
11	Container	Container\Container with autowiring, singletons, aliases and method injection
12	Extended Coding Style	enforced with phpcs; the 120-character line length is a soft limit
13	Hypermedia Links	Http\Link, Http\LinkProvider, Paginator::links()
14	Event Dispatcher	Events\Dispatcher is both dispatcher and listener provider; stoppable events supported
15	HTTP Handlers / Middleware	the router is a RequestHandlerInterface; every built-in middleware is a MiddlewareInterface
16	Simple Cache	Cache\FileCache, ArrayCache, Redis\RedisCache
17	HTTP Factories	Psr17Factory is bound for requests, responses, streams, URIs and uploaded files
18	HTTP Client	Guzzle, wrapped by Http\Client\Http with safe redirects and SSRF protection
20	Clock	Support\SystemClock, FrozenClock

PSR-2, 5, 8, 9, 10, 19 and 21 are abandoned, drafts or withdrawn and are not applicable.

Because the standards are interfaces, you can replace implementations (for example a Monolog logger or a Symfony cache) by binding them in a service provider.