PHP: Simple Routing class, question how to add mutiple routes - php

Question

I try to work with a simple Router class (learning basics before a framework, but I think I got something wrong with the example router I used. Below is a very small router class I got from a colleague and I tried to integrate it into my code to substitute previous uses where I just used echo before (commented out part of the code).
both loginController showLoggedInUser() and registerController index() are just used to render an html template.
Both $router->add() would work if I use it just to add a single route, however my router does not save multiple routes in the array because it seems every route will be saved under the key '/' and in case I provide mutiple routes it seems my previous routes are simply overwritten. So I guess I would need to adjust the Router class. How can I fix this?
PHP 7.4 used
Router.php
<?php
declare(strict_types=1);
class Router
{
private array $route;
public function add(string $url, callable $method): void
{
$this->route[$url] = $method;
}
public function run()
{
$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
if(!array_key_exists($path, $this->route))
{
exit();
}
return call_user_func($this->route[$path]);
}
}
index.php
<?php
declare(strict_types=1);
require __DIR__ . '/../vendor/autoload.php';
session_start();
$router = new Router();
$mysqliConnection = new MysqliConnection();
$session = new SessionService();
$loginController = new Login($mysqliConnection);
$router->add('/', [$loginController, 'showLoggedInUser']);
//echo $loginController->showLoggedInUser();
$registerController = new Register($mysqliConnection);
$router->add('/', [$registerController, 'index']);
//echo $registerController->index();
echo $router->run();

Answer 1

Not sure of the overall principle of having two routes with the same name, but you could achieve this using a list of callables for each route.
I've made some changes (including the callable passed for each route) to show the principle, but you should get the idea...
class Router
{
private array $route;
public function add(string $url, callable $method): void
{
$this->route[$url][] = $method;
}
public function run()
{
$path = parse_url($_SERVER['REQUEST_URI'], PHP_URL_PATH);
if(!array_key_exists($path, $this->route))
{
exit();
}
foreach ( $this->route[$path] as $paths ) {
$paths();
}
// Not sure what to return in this case.
// return call_user_func($this->route[$path]);
}
}
$router = new Router();
// $mysqliConnection = new MysqliConnection();
// $session = new SessionService();
// $loginController = new Login($mysqliConnection);
$router->add('/', function () { echo "login"; } );
// $registerController = new Register($mysqliConnection);
$router->add('/', function () { echo "Register"; });
echo $router->run();
I would instead recommend having separate url's, /login and /register so that they can be called separately.