php文件上传怪问题，急急急！

[ZXHCAO]

//
<form action="uploadfile.php" name="form1" ENCTYPE="multipart/form-data" METHOD="POST">
<tr>
<td height="25" bgcolor="ffffff" align="left"> 上传文件：
</td>
</tr>
<tr>
<td height="25" bgcolor="ffffff" align="left">  1.<INPUT TYPE="FILE" name="userfile" style="width:200pt; height:14pt">
</td>
</tr>
<tr>
<td height="25" bgcolor="ffffff" align="left">  2.<input type='submit' value='粘贴' style="width:80pt; height:14pt">
</td>
</tr>
</form>


//uploadfile.php
<?
echo $userfile;
?>
在uploadfile.php里有时能得到文件名，有时得不到文件名，既使是英文名，请问是怎么回事？

[zhwb36]

用这种方式访问
$_FILES['userfile']['name']
The original name of the file on the client machine.

$_FILES['userfile']['type']
The mime type of the file, if the browser provided this information. An example would be "image/gif".

$_FILES['userfile']['size']
The size, in bytes, of the uploaded file.

$_FILES['userfile']['tmp_name']
The temporary filename of the file in which the uploaded file was stored on the server.

$_FILES['userfile']['error']
The error code associated with this file upload. ['error'] was added in PHP 4.2.0

[ZXHCAO]

是我的电脑问题，也不知道出了什么问题！放到服务器上就没有问题了。