如何在Symfony中发送复选框值的数组

use Symfony\Component\Form\Extension\Core\Type\CheckboxType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class MyFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('checkboxValues', CheckboxType::class, [
                'label' => 'Checkbox Values',
                'choices' => [
                    'Option 1' => 'option1',
                    'Option 2' => 'option2',
                    'Option 3' => 'option3',
                ],
                'expanded' => true,
                'multiple' => true,
            ]);
    }
}

use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\Routing\Annotation\Route;

class MyController extends AbstractController
{
    /**
     * @Route("/form", name="form")
     */
    public function form(Request $request)
    {
        $form = $this->createForm(MyFormType::class);
        $form->handleRequest($request);

        if ($form->isSubmitted() && $form->isValid()) {
            $checkboxValues = $form->get('checkboxValues')->getData();
            // 处理复选框值的数组
        }

        return $this->render('form.html.twig', [
            'form' => $form->createView(),
        ]);
    }
}

{# form.html.twig #}

{{ form_start(form) }}
{{ form_widget(form) }}
{{ form_end(form) }}