regi2p/lib/router.php

<?php

namespace App;

class Router {
    private $routes;
    private $errRoute;

    public function addRoute($pattern, $function) {
        $this->routes['{'.$pattern.'}'] = $function;
    }

    public function addErrorRoute($function) {
        $this->errRoute = $function;
    }

    public function run() {
        foreach ($this->routes as $pattern => $function) {
            if (preg_match($pattern, $_SERVER['REQUEST_URI'], $params)) {
                array_shift($params);
                array_unshift($params, $_SERVER['REQUEST_URI']);

                return call_user_func_array($function, array_values($params));
            }
        }

        return call_user_func($this->errRoute);
    }
}