Symfony表单类型-添加选项

use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\Extension\Core\Type\SubmitType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class MyFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            ->add('myField', ChoiceType::class, [
                'choices' => [
                    'Option 1' => 'option1',
                    'Option 2' => 'option2',
                    'Option 3' => 'option3',
                ],
                'multiple' => false,
                'expanded' => false,
                'required' => true,
                'placeholder' => 'Select an option',
            ])
            ->add('submit', SubmitType::class);
    }

    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'data_class' => MyFormData::class,
        ]);
    }
}