php $_POST 禁用选择
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$_POST for disabled select
提问by infinityskyline
<select class="txtbx1" name="country" disabled>
<option value='FR' >FRANCE</option><option value='CH' selected>SWITZERLAND</option>
</select>
the above code is inside a form whose method is post
上面的代码在一个方法是 post 的表单中
but echo $_POST['country']is showing nothing.. on the other hand if I remove disabled from select $_POST['country']is showing the correct result
但echo $_POST['country']什么也没显示……另一方面，如果我从 select 中删除 disabled$_POST['country']会显示正确的结果
回答by DaveRandom
This is how the disabledattribute works. When a form control is disabled, the value will be ignored when the form is submitted and the key will not be present in $_POST(or $_GET).
这就是disabled属性的工作方式。当表单控件被禁用时，提交表单时该值将被忽略，并且键不会出现在$_POST（或$_GET）中。
If you want the value to be present in the submitted data, but you don't want the user to be able to change the value on the page (which I imagine is what you are trying to acheive) use readonly="readonly"instead of disabled="disabled".
如果你想要的值存在于提交的数据，但你不希望用户能够更改页面上的值（我想是你想acheive什么）使用readonly="readonly"代替disabled="disabled"。
EDIT
编辑
The <select>element does not have a readonlyattribute. The above information still stands as it willwork for <input>s and <textarea>s.
该<select>元素没有readonly属性。以上信息仍然有效，因为它会为工作的<input>S和<textarea>秒。
The solution to your problem here would be to disable the select and use a hidden input to send the value back to the server - e.g.
您的问题的解决方案是禁用选择并使用隐藏输入将值发送回服务器 - 例如
When the select is enabled:
启用选择时：
<select class="txtbx1" name="country">
<!-- options here -->
</select>
...and when it is disabled:
...当它被禁用时：
<select class="txtbx1" name="country_disabled" disabled="disabled">
<!-- options here, with appropriate value having `selected="selected"` -->
</select>
<input type="hidden" name="country" value="value_of_field" />
回答by Rocket Hazmat
This is the correct behavior. disableddisables the element, and does not send it's value when a form is POSTed.
这是正确的行为。 disabled禁用该元素，并且在发布表单时不发送它的值。
You can use JavaScript to un-disable the form before you submit it. Something like this (untested):
在提交表单之前，您可以使用 JavaScript 取消禁用表单。像这样的东西（未经测试）：
document.getElementById('myForm').addEventListener('submit', function() {
for(var i = 0; i < this.children.length; i++){
var child = this.children[i];
if(child.disabled){
child.disabled = false;
}
}
});
回答by Carlos Eduardo da Fonseca
How your form tag looks like? You may have forgotten the method="post"attribute...
你的表单标签是什么样的？你可能忘记了method="post"属性...
