php HTML 表单下拉菜单指定数字范围
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/16742247/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
HTML form dropdown menu specify number range
提问by Satish
I want to specify number range in drop-down menu list like 1-24 from example i am currently doing following
我想在下拉菜单列表中指定数字范围，例如我目前正在执行的示例中的 1-24
<select name="hour">
<option value="1">1</option>
<option value="2">2</option>
<option value="3">3</option>
<option value="4">4</option>
...
...
<option value="24">24</option>
</select>
is there any way we can say use 1-24 and it dynamically create drop-down menu, I guess we need to use Javascript but i don't know how to code them?
有什么办法可以说使用 1-24 并动态创建下拉菜单，我想我们需要使用 Javascript 但我不知道如何编码它们？
回答by Terry Harvey
You don't need Javascript, you can use a PHP for loop:
你不需要 Javascript，你可以使用 PHP for 循环：
<select name="hour">
<?php for ($i = 1; $i <= 24; $i++) : ?>
<option value="<?php echo $i; ?>"><?php echo $i; ?></option>
<?php endfor; ?>
</select>
回答by prichrd
You can do it with a javascript that looks like that:
您可以使用如下所示的 javascript 来实现：
for(var i=1; i<=24; i++){
var select = document.getElementById("hours");
var option = document.createElement("OPTION");
select.options.add(option);
option.text = i;
option.value = i;
}
Here is the full jsFiddle I made for you: jsFiddle
这是我为您制作的完整 jsFiddle： jsFiddle
回答by Ace Indy
Use PHP Range — Create an array containing a range of elements
使用 PHP Range — 创建一个包含一系列元素的数组
echo '<select name="hour">';
foreach (range(1,24) as $number) {
echo '<option value='.$number.'>'.$number.'</option>';
}
echo '</select>';
回答by Satish
Even i have also figured out following after your example:
即使我也在你的例子之后想出了以下内容：
<?php
echo "<select>";
for ($h = 1; $h <= 24; $h++) echo "<option value='$h'>$h</option>";
echo "</select>";
?>
