UUID at the controller level

controlller.php

<?php

class CreateOrderController extends Controller
{
    public function createOrderWithCustomer(array $order)
    {
        // Create the reference here because then we know it for the order and can async everything
        $customerReference = uuid::uuid4()->toString();
        
        // Validate `$order`
        
        $this->get('create_customer_service')->createCustomer(
            $customerReference, $data['first_name'], $data['last_name'], $data['email_address']
        );
        
        $this->get('create_order_service')->createOrderForCustomer($customerReference, $data['order_stuff']);
        
        return new Response('ok', Response::HTTP_OK);
    }
}

create_customer.php

<?php

class CreateCustomer
{
    /**
     * @var CommandBusInterface
     */
    private $commandBus;

    public function __construct(CommandBusInterface $commandBus)
    {
        $this->commandBus = $commandBus;
    }

    public function create(string $reference, string $firstName, string $lastName, string $emailAddress): void
    {
        $command = new CreateCustomerCommand($reference, $firstName, $lastName, $emailAddress);

        $this->commandBus->handle($command);
    }
}