PHP 数组和 HTML 表单下拉列表
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PHP Array and HTML Form Drop Down List
提问by Steve Kemp
I have a simple PHP Array called $categories that looks like this:
我有一个名为 $categories 的简单 PHP 数组，如下所示：
Array
(
[Closed] => P1000
[Open] => P1001
[Pending] => P1002
[In Progress] => P1003
[Requires Approval] => P1004
)
I've got a simple HTML form that has a drop down list for one field that I would like to use the array for the options, however I only want it do show the text (e.g. Closed, Open, Pending, In Progress and Requires Approval) as the options in the drop down list but store the associated key for that option (e.g. P1000, P1001 etc) which is then sent as a POST value when the form is submitted.
我有一个简单的 HTML 表单，其中有一个字段的下拉列表，我想将数组用于选项，但是我只希望它显示文本（例如，已关闭、打开、待处理、进行中和需要Approval) 作为下拉列表中的选项，但存储该选项的关联键（例如 P1000、P1001 等），然后在提交表单时将其作为 POST 值发送。
The HTML for the form field so far is:
到目前为止，表单字段的 HTML 是：
<select name="category_id">
<option value=""></option>
<?php foreach($categories as $category) {$category = htmlspecialchars($category);?>
<option value="<?php echo $category; ?>"><?php echo $category; ?></option>
<?php
}
?>
</select>
I can get it to display either the text or the ID's but not the text and store the ID. Hopefully this is something simple that someone can point me in the right direction.
我可以让它显示文本或 ID，但不能显示文本并存储 ID。希望这是一些简单的事情，有人可以指出我正确的方向。
Many thanks, Steve
非常感谢，史蒂夫
回答by Robik
You've forgot about $value tag. You were pasting Category name twice, instead of value. You should do that:
你已经忘记了 $value 标签。您粘贴了两次类别名称，而不是值。你应该这样做：
<select name="category_id">
<option value=""></option>
<?php
# !vCHANGEv!
foreach($categories as $category => $value)
{
$category = htmlspecialchars($category);
echo '<option value="'. $value .'">'. $category .'</option>';
}
?>
</select>
回答by Shakti Singh
As you have to include key and value both key is to show the text and value for POST
由于您必须包含键和值，这两个键都是为了显示 POST 的文本和值
<?php foreach($categories as $key => $category) {
$category = htmlspecialchars($category);?>
<option value="<?php echo $category; ?>"><?php echo $key; ?></option>
<?php
}
?>
回答by Nazariy
you have not included keys in foreach loop
你没有在 foreach 循环中包含键
foreach($categories as $id=>$category){
$category = htmlspecialchars($category);
echo "<option value="{$id}">{$category}</option>";
}
回答by MacMac
foreach($categories as $category => $category_id)
Is what you're looking for.
是你要找的。
回答by Muhammad Yasir
<select name="category_id">
<option value=""></option>
<?php
$keys = array_keys($categories);
for($i=0; $i<count($categories); $i++)
{?>
<option value="<?php echo $keys[$i]; ?>"><?php echo $categories[$i]; ?></option>
<?php
}
?>
</select>
Supposing that $categories is the array you have shown above.
假设 $categories 是您在上面显示的数组。
