代码示例:(标识:html5_input_formenctype)
<!DOCTYPE html>
<html>
<body>

<h1>input formenctype 属性</h1>

<p>formenctype 属性规定提交表单数据时应如何编码。</p>

<form action="/index/demo/form_current.html" method="post">
  <label for="fname">First name:</label>
  <input type="text" id="fname" name="fname"><br><br>
  <input type="submit" value="提交">
  <input type="submit" formenctype="multipart/form-data" value="以 Multipart/form-data 提交">
</form>

</body>
</html>
运行结果: