router proposal for 5.5.0 or over

router.php

<?php
use \SplObjectStorage;
use Zend\Http\PhpEnvironment\Request;
use Zend\Http\PhpEnvironment\Response;

class Dispatcher
{
    private $router;

    public function __construct(Router $router)
    {
        $this->router = $router;
    }

    public function dispatch(Request $request, Response $response)
    {
        foreach ($this->router as $routeMatcher => $action) {
            if ($routeMatcher($request)) {
                return $action($response);
            }
        }
    }
}

class Router extends SplObjectStorage
{
    public function attach($object, $data = null){
        parent::attach($object, $data);
        return $this;
    }

    public function current()
    {
        return $this[$this->key()];
    }

    public function key()
    {
        return parent::current();
    }
}

(new Dispatcher((new Router)
    ->attach(function(Request $request) {
        if ($request->getUri()->getPath() === '/hello') {
            return true;
        }
        return false;
    }, function (Response $response) {
        $response->setContent('hello world!');
        return $response;
    })
    ->attach(function(Request $request){
        return true;
    }, function (Response $response) {
        $response->setContent('hello world2!');
        return $response;
    }))
)->dispatch(new Request, new Response)->send();