How to redirect url after file download.

Hi,

I want to redirect url after file download, now I have the following script:

<?
include("refcode.php");

if(false!=file_exists("./up/".$ups[$_POST['code']]))
{
$file_dir = "./updir/";
$myFileName=$ups[$_POST['code']];

$file = fopen($file_dir.$myFileName,"r");
if (!$file)
{
show_msg("File not open.");
}
else
{
Header("Content-type: application/octet-stream");
Header("Content-Disposition: attachment; filename=" . $myFileName);
while (!feof ($file))
{
echo fread($file,50000);
}
fclose ($file);
show_msg("Download sucessfully.");
}
}
else
{
show_msg("File not existed.");
}

function show_msg($msg)
{
include("error.php");
exit();
}
?>

The file "error.php" is used to display some information about download.The function show_msg is responsible for display the message in a new page.

Now the file can be downloaded sucessfully, but the problem is that show_msg does not execute after file download.

I think it may be caused by "Header", but I'm not sure.

Can anyone help me to figure it out?

Thanks.

is it not entering the function?
can you put die("function entered"); right after the start of the function to see?

i don't see setting header output stopping the function from being called.

when all this happens check the source to see if it's a php error. sometimes they don't show up on the page. :S