Ajaxupload多文件上传

<pre name="code" class="php"><?php 
$ele = $_GET[&#39;ele&#39;]; 
$file = $_FILES[&#39;thumb_&#39;.$ele]; 
$pathinfo = pathinfo($file[&#39;name&#39;]); 
$filedir = &#39;uploads/&#39; . date(&#39;Y&#39;); 
if (!is_dir($filedir)) 
{ 
  mkdir($filedir); 
} 
$filedir .= &#39;/&#39; . date(&#39;md&#39;); 
if (!is_dir($filedir)) 
{ 
  mkdir($filedir); 
} 
$filedir .= &#39;/&#39; . time() . &#39;_&#39; . mt_rand(1000, 9999) . &#39;.&#39; . $pathinfo[&#39;extension&#39;]; 
$msg = &#39;&#39;; 
if (!move_uploaded_file($file[&#39;tmp_name&#39;], $filedir)) 
{ 
  $msg = &#39;上传失败&#39;; 
} 
$data = array(&#39;msg&#39; => $msg, &#39;filedir&#39; => $filedir); 
sleep(2); 
echo json_encode($data); 
?>