如何在下拉框中设置所选项目 [英] How do I set the selected item in a drop down box

问题描述

有没有办法使用以下类型代码在下拉框中设置所选项目？

  ; select selected =<？php print（$ row [month]）;？>>< option value =Janurary> January< / option>< option value =February> February< ; / option>< option value =March> March< / option>< option value =April> April< / option>< / select> 
  

数据库持有一个月..我想允许在编辑页面上，他们选择这个但是要预先填写当前的设置？

解决方案

您需要设置所选属性的正确选项标签：

 < option value =Januaryselected =selected> January< / option> 
  

您的PHP看起来像这样：

 < option value =January<？= $ row ['month'] =='January'？ 'selected =selected'：'';？>> January< / option> 
  

我通常会找到更好的值来创建一个数组，并循环创建一个下拉列表。 / p>

Is there any way to set the selected item in a drop down box using the following 'type' code?

<select selected="<?php print($row[month]); ?>"><option value="Janurary">January</option><option value="February">February</option><option value="March">March</option><option value="April">April</option></select>

The database holds a month.. and I want to allow on the edit page, them to choose this month.. but it to be pre-filled with their current setting?

解决方案

You need to set the selected attribute of the correct option tag:

<option value="January" selected="selected">January</option>

Your PHP would look something like this:

<option value="January"<?=$row['month'] == 'January' ? ' selected="selected"' : '';?>>January</option>

I usually find it neater to create an array of values and loop through that to create a dropdown.

这篇关于如何在下拉框中设置所选项目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！