根据环境在Symfony 3表单类型中添加或删除字段

use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;

// ...

$builder->addEventListener(FormEvents::PRE_SET_DATA, function (FormEvent $event) {
    $form = $event->getForm();
    $data = $event->getData();

    // 根据环境条件添加字段
    if ($data['environment'] === 'development') {
        $form->add('additional_field', TextType::class);
    }
});

use Symfony\Component\Form\FormEvent;
use Symfony\Component\Form\FormEvents;

// ...

$builder->addEventListener(FormEvents::PRE_SUBMIT, function (FormEvent $event) {
    $form = $event->getForm();
    $data = $event->getData();

    // 根据环境条件删除字段
    if ($data['environment'] === 'production') {
        $form->remove('additional_field');
    }
});