<form id="myForm" method="post">
Files: <input type="file" id="files" name="files" multiple><br/>
<div id="selectedFiles"></div>
<input type="submit">
</form>
JS循环到FormData
Files: <input type="file" id="files" name="files[]" multiple><br/>
$_FILE是个数组 百度一下就明白了