Challenge 1 / 1

Check out this route: #[Route('/api/articles/{id}')].

How could we best guarantee that the {id} part of the URL is a number?

#[Route('/api/articles/{id}']
public function someMethod($id)
{
    if (!is_numeric($id)) {
        throw $this->createNotFoundException();
    }
}

#[Route('/api/articles/{id}']
public function someMethod(int $id)
{
}

#[Route('/api/articles/{id<\d+>}']

#[Route('/api/articles/{<\id+>}']