php多文件上傳

<form action="todo2.php" method="post" enctype="multipart/form-data">
<input type="file" name="myfile[]" /><br />
    <input type="file" name="myfile[]" /><br />
    <input type="file" name="myfile[]" /><br />
    <input type="file" name="myfile[]" /><br />
    <input type="hidden" name="MAX_FILE_SIZE" />
    <input type="submit" value="上傳" />
</form>

/***

$_FIELS["myfile"]["name"]["0"];
$_FIELS["myfile"]["name"]["1"];
$_FIELS["myfile"]["name"]["2"];
$_FIELS["myfile"]["name"]["3"];
***/


$uploaddir="uploads/";
for($i=0; $i<count($_FILES["myfile"]["name"]); $i++)
{
if($_FILES["myfile"]["size"][$i] >=800000)
{
echo $_FILES["myfile"]["name"][$i]."文件太大<BR>";
continue;
}
if($_FILES["myfile"]["type"][$i] !="text/plain")
{
echo $_FILES["myfile"]["name"][$i]."文件不是文本類型<BR>";
continue;
}
if($_FILES["myfile"]["error"][$i] !=0)
{
echo $_FILES["myfile"]["name"][$i]."文件不能上傳<Br>";
continue;
}
if(move_uploaded_file($_FILES["myfile"]["tmp_name"][$i],$uploaddir.time().$_FILES["myfile"]["name"][$i]))
{
echo "上傳成功<BR>";
}
}