从w3：标签本身可能位于相关控件之前，之后或周围。

或

或

注意第三种技术不能当表格用于布局时使用，在一个单元格中的标签和在另一个单元格中的相关表单字段。

任何一个都是有效的。我喜欢使用第一个或第二个示例，因为它为您提供了更多样式控制。

I was just wondering if there is a best practice concerning label and input tag :

classic way:

<label for="myinput">My Text</label>
<input type="text" id="myinput" />

or

<label for="myinput">My Text
   <input type="text" id="myinput" />
</label>

From w3: The label itself may be positioned before, after or around the associated control.

<label for="lastname">Last Name</label>
<input type="text" id="lastname" />

or

<input type="text" id="lastname" />
<label for="lastname">Last Name</label>

or

<label>
   <input type="text" name="lastname" />
   Last Name
</label>

Note that the third technique cannot be used when a table is being used for layout, with the label in one cell and its associated form field in another cell.

Either one is valid. I like to use either the first or second example, as it gives you more style control.