将所有值保存在“多选"中 [英] Saving all values in "multiple select"

问题描述

我在 wordpress 中有一个具有多重选择形式的元框.

im having a metabox in wordpress with a mutliple select form.

<select name="my_meta_box_select" id="my_meta_box_select" multiple="" style="width:300px; height:400px;">
    <option value="red">Red
    </option>
    <option value="blue">Blue
    </option>
</select>

到目前为止一切顺利，所选值已保存，我可以检索它，但我希望两个值都被保存.

So far so good, the selected value gets saved and I am able to retrieve it, however I wish for both values to be saved.

例如，我希望同时保存红色和蓝色并能够从前端检索它.有没有办法实现这一目标?还有比 select 更好的表单吗?

For example I wish to save both red AND blue and be able to retrieve it from the frontend. Is there any way to achieve this? Are there better forms than a select?

目的是让用户从一个选择字段选择页面到另一个选择字段，然后保存第二个选择字段.

The purpose is for a user to select pages from one select field to another and then save the second select field.

选择 1:

红色

蓝色

绿色

选择 2:

橙色

-按钮-

现在，如果用户从 select 1 中选择 red 和 blue 然后按下 -button-这些值将添加到选择 2.当我现在按下更新页面时，我希望将所有值保存在选择 2 中.

Now if a user where to select red and blue from select 1 and then press -button- the values will be added to select 2. When I now press update page I wish to save all the values in select 2.

这就是我从当前选择字段中保存的方式(但它只保存一个选定的值)

This is how i save from my current select field (but it only saves ONE selected value)

if( isset( $_POST['my_meta_box_select'] ) )
    update_post_meta( $post_id, 'my_meta_box_select', esc_attr( $_POST['my_meta_box_select'] ) );

推荐答案

经常被忽视，超级简单.

Often overlooked, super simple.

name 属性需要允许通过 $_POST 作为数组发送多个选择.例如:

The name attribute needs to allow for multiple selections to be sent over $_POST as an array. For example:

<select name="my_meta_box_select[]" id="my_meta_box_select" multiple="" style="width:300px; height:400px;">
    <option value="red">Red
    </option>
    <option value="blue">Blue
    </option>
</select>

注意名称中的 []:name="my_meta_box_select[]"

这与 multiple 属性一起，将允许您的 $_POST 变量以数组的形式包含所有选择.也就是说，$_POST['my_meta_box_select'] 不仅仅是一个简单的值，而是一个包含所有选择的数组.

This, alongside the multiple attribute, will allow your $_POST variable to contain all selections as an array. That said, $_POST['my_meta_box_select'] will not just be a simple value, but rather will be an array will all selections.

这篇关于将所有值保存在“多选"中的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！