PSR-15 Middleware vs HttpKernelInterface implemented as middleware

suggestion.md

Different middleware implementations for comparison

PSR-15 Middleware

<?php

use Psr\Http\Server\{MiddlewareInterface, RequestHandlerInterface};
use Psr\Http\Message\{ServerRequestInterface, ResponseInterface};

class Middleware implements MiddlewareInterface
{
    public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
    {
        // do stuff to the request

        $response = $handler->handle($request);

        // do stuff to the response

        return $response;
    }
}

HttpKernelInterface middleware

<?php

use Symfony\Component\HttpFoundation\{Request, Response};
use Symfony\Component\HttpKernel\HttpKernelInterface;

class Middleware implements HttpKernelInterface
{
    private $kernel;

    public function __construct(HttpKernelInterface $kernel)
    {
        $this->kernel = $kernel;
    }

    public function handle(Request $request, $type = self::MASTER_REQUEST, $catch = true)
    {
        // do stuff to the request

        $response = $this->kernel->handle($request, $type, $catch);

        // do stuff to the response

        return $response;
    }
}