Simple Regex Router

RegexRouter.php

class RegexRouter
{
    private $routes = array();

    public function addRoute($route, callable $service)
    {
        $route = '#^'.$route.'$#';
        $this->routes[$route] = $service;
        return $this;
    }

    public function isValid($uri)
    {
        $params = [];

        foreach ($this->routes as $route => $service) {
            if (preg_match($route, $uri, $params)) {
                array_shift($params);
                return call_user_func_array($service, array_values($params));
            }
        }
    }
}