数组中的Symfony下拉列表

// 在你的表单类型类中
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\Form\FormBuilderInterface;

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('country', ChoiceType::class, [
            'choices' => [
                '中国' => 'CN',
                '美国' => 'US',
                '英国' => 'GB',
            ],
            'expanded' => false, // 是否展开为复选框，默认为false，即下拉列表
            'multiple' => false, // 是否允许多选，默认为false
        ]);
    }
}

// 假设你有一个CountryService来获取国家列表
public function __construct(CountryService $countryService)
{
    $this->countryService = $countryService;
}

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $countries = $this->countryService->getAllCountries();

    $builder->add('country', ChoiceType::class, [
        'choices' => $countries,
        // 其他配置...
    ]);
}