simplerouter.php

<?php

class SimpleRouter {

  protected $routes = [];
  
  public function add(string $route, callable $controller) : SimpleRouter {
    $this->routes[$route] = $controller;
    return $this;
  }
  
  public function match(string $route) : callable {
    if (! isset($this->routes[$route])) {
      throw new NotFoundException();
    }
    
    return $this->routes[$route];
  }
}