How to organize rules in urlManager?

Question

Yii

Good day!
I wrote the following in the rules:

'rules' => [
    'post/' => 'post/index/',
    '' => 'main/index',
],

The post controller itself looks like this:

class PostController extends Controller
{
    public function actionIndex($id)
    {
         //получаем запись, где 'id' = '$id'
    }
}

As a result, everything is executed only when you use an address like "site.ru/post?id=12312".
Question: How can I use rules to make a publication available at an address without a GET request, i.e. something like "site.ru/post/12312"? That is, so that the id parameter is passed to action without GET requests.
I beg you to help me with this.

Answer 1

'post/<id:\d+>' => 'post/index',
Dock by URL Rules .