Drupal 7 FAPI-在验证或提交处理程序中添加表单元素

Question

是否可以在drupal 7模块的验证或提交函数中添加其他表单元素？以下代码工作,图像显示在窗体上:

function test1_form($form, &$form_state)
{
     $form['image']=array(
           '#markup'=>'<img src="sites/all/modules/create_ad/th.jpeg"><br/>', //replace with your own image path
     );

     $form['submit'] = array(
           '#type' => 'submit',
           '#value' => 'Submit',
     );
}

但是当我尝试在提交函数中提交后显示图像,如下所示,它不起作用:

function test1_form($form, &$form_state)
{
     $form['submit'] = array(
           '#type' => 'submit',
           '#value' => 'Submit',
     );
}

function test1_form_submit($form,&$form_state)
{
     $form['image']=array(
           '#markup'=>'<img src="sites/all/modules/create_ad/th.jpeg"><br/>', //replace with your own image path
     );
}

欢迎任何积极的帮助.谢谢.

Answer 1

您可以按照多步骤表单方法在提交后向表单添加其他字段.

这是一篇博客文章,讨论了一个多步骤的方法,可以给你一些见解.

基本上,在提交函数中,您可以存储值并设置要重建的表单.然后在表单函数中检查这些存储的值并添加新字段(如果存在).

例:

<?php
function test1_form($form, &$form_state)
{
        if (isset($form_state['storage']['show-image'])){
            $form['image']=array(
                '#markup'=>'<img src="sites/all/modules/create_ad/th.jpeg"><br/>', //replace with your own image path
            );
        }

     $form['submit'] = array(
                 '#type' => 'submit',
                 '#value' => 'Submit',
     );
}

function test1_form_submit($form,&$form_state)
{
    $form_state['rebuild'] = TRUE;
    $form_state['storage']['show-image'] = true;
}