AfterMiddlewareInterface.php

<?php

namespace Psr\Http\Middleware;

use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

interface AfterMiddlewareInterface
{
  public function after(RequestInterface $request, ResponseInterface $response, callable $next);
}

AroundMiddlewareInterface.php

<?php

namespace Psr\Http\Middleware;

use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

interface AroundMiddlewareInterface
{
  public function around(HandlerInterface $handler) : HandlerInterface;
}

BeforeMiddlewareInterface.php

<?php

namespace Psr\Http\Middleware;

use Psr\Http\Message\RequestInterface;

interface BeforeMiddlewareInterface
{
  public function before(RequestInterface $request, callable $next);
}

HandlerInterface.php

<?php

namespace Psr\Http\Middleware;

use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;

interface HandlerInterface
{
  public function handle(RequestInterface $request) : ResponseInterface;
}