我这个程序可以让你上传任何类型的文件并可以直接显示或下载下来(upload_and_show.php3)：
if($submit)
{
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
header("Cache-Control: no-cache, must-revalidate");
header("content-type:application/octet-stream");
header("content-disposition:inline;filename=$form_data");
header("content-description:php3 generated data");
$fd = fopen($form_data,"r");
while($string = fread($fd,200)){
echo $string;
}
fclose($fd);
}
else { ?>
