$MeineDaten = "Zeile 1\nZeile2\n";
$DownloadFile = "on-the-fly.csv";

$Header  = "Content-Type: text/x-csv\n";
$Header .= "Content-Transfer-Encoding: ascii\n";
$Header .= "Expires: Mon, 26 Jul 2004 05:00:00 GMT\n";
if($ENV{HTTP_USER_AGENT} =~ /MSIE/) {
    $Header .= "Content-Disposition: inline\; filename=$DownloadFile\n";
    $Header .= "Cache-Control: must-revalidate, post-check=0, pre-check=0\n";
    $Header .= "Pragma: public\n\n";
}
else {
    $Header .= "Content-Disposition: attachment\; filename=$DownloadFile\n";
    $Header .= "Pragma: no-cache\n\n";
}

print $Header.$MeineDaten;