foo_controller.php

<?php

class Controller_Foo extends Controller
{
    public function index()
    {
        return 'You got me!';
    }

    public function save()
    {
        return 'You posted me!';
    }
}

route.yml

homepage:
  url: /foo
  param: { module: Foo, action: index }
  requirements: { method: GET }
  
edit_route_name:
  url: /foo
  param: { module: Foo, action: save }
  requirements: { method: POST }