如何设置CodeIgniter单选按钮，它在$ _POST之前？ [英] How do you set a CodeIgniter radio button, before it's in the $_POST?

问题描述

因此，在CodeIgniter表单助手中（ http://ellislab.com/ codeigniter / user-guide / helpers / form_helper.html ）您有此功能：

set_radio（）

允许您以提交的状态显示单选按钮。
此函数与上述set_checkbox（）函数相同。

 < input type =radioname = myradiovalue =1<？php echo set_radio（'myradio'，'1'，TRUE）; ？> /> 
< input type =radioname =myradiovalue =2<？php echo set_radio（'myradio'，'2'）; ？> /> 
  

问题是我在提交表单之前已经有信息。据我理解，这个 set_radio（）函数使用POST操作中的数据在表单验证失败时设置值，需要重做。

这是否有意义？

所以如果我还没有做第一个POST， c $ c> set_radio（）没有任何数据用于预设单选按钮。

解决方案

您可以随时修改 $ _ POST 变量， / p>

  if（！isset（$ _ POST ['myradio']））{
 $ _POST ['myradio'] = $ myDefaultValue; 
} 
  

在开始使用表单助手之前执行此操作， / p>

So in the CodeIgniter form helper, (http://ellislab.com/codeigniter/user-guide/helpers/form_helper.html) you have this function:

set_radio()

Permits you to display radio buttons in the state they were submitted. This function is identical to the set_checkbox() function above.

<input type="radio" name="myradio" value="1" <?php echo set_radio('myradio', '1', TRUE); ?> />
<input type="radio" name="myradio" value="2" <?php echo set_radio('myradio', '2'); ?> />

The problem is that I already have information BEFORE I present the form. As I understand it, this set_radio() function uses the data in the POST action to set the value when the form validation fails, and needs to be redone.

Does that make sense?

So if I haven't done the first POST yet, the set_radio() doesn't have any data to use to pre-set the radio button.

解决方案

You can always modify $_POST variable, like this:

if (!isset($_POST['myradio'])) {
    $_POST['myradio'] = $myDefaultValue;
} 

Do this before you start working with form helper and you should be fine.

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