在控制器和url的动作部分之后使用if-else语句根据参数加载视图是否有效,或者有更好的方法吗

我可以有以下URL

www.example.com/accounts/
www.example.com/accounts/signup
www.example.com/accounts/signup/validate
www.example.com/accounts/login

指数

$url_segments = explode('/', $url);

$controller = !empty($url_segments[0]) ? $url_segments[0] : 'home';
array_shift($url_segments); // removes the controller name from array
$action = isset($url_segments[0]) && !empty($url_segments[0]) ? $url_segments[0] : 'index';
array_shift($url_segments); // removes the action name from array

$controller = ucfirst($controller);
$controller = new $controller($url_segments);
$controller->$action();

控制器类

class Accounts{
    private $url_segments;

    public function __construct() {
        $this->url_segments = $url_segments;
    }
    public function index() {
        // index code here
    }
    public function login() {
        // login code here
    }
    public function signup() {
        if (!isset($this->url_segments[0])) { 
            // url entered was: example.com/signup
        } else if (isset($this->url_segments[0]) && $this->url_segments[0] == 'validate') {
            // url entered was: example.com/signup/validate
        }
    }
}

/signup/ signup/validate . 这种使用条件语句加载基于参数的视图的方法有效吗?或者有更好的方法吗。