如何在Symfony 4表单的输入中添加占位符? [英] How to add placeholder on input in Symfony 4 form?

问题描述

在我的Symfony 4表单中，我尝试为我的输入获取一个占位符.我尝试了以下操作，但收到错误消息，不允许这样做.有什么想法我还能实现吗?

In my Symfony 4 form, I am try to get a placeholder for my input. I tried the below but I get an error that it is not allowed. Any ideas how else I can achieve this?

        ->add('firstname', TextType::class, ['label' => 'Vorname ', 'placeholder' => 'Your name',])

根据文档中的建议，在下面也尝试过，这里我没有收到错误，只是没有渲染.

As suggested in the documentation I have also tried the below, here I am not getting an error, just nothing is rendering.

        ->add('firstname', TextType::class, ['label' => 'Vorname '], ['attr' => ['placeholder' => 'Vorname ']])

推荐答案

您需要这样做:

->add('firstname', TextType::class, array(
      'label' => 'Vorname ',
      'attr' => array(
          'placeholder' => 'hereYourPlaceHolder'
      )
 ))

正如他们在文档中所说的那样

As they say in the documentation

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