header("Content-Type: application/force-download", false);
header("Content-Type: application/octet-stream", false);
header("Content-Type: application/download", false);
header("Content-Transfer-Encoding: binary");
header("Content-type : application/vnd.ms-excel", false);
header("Cache-control: private");

// get the browser name
$browser = $_SERVER['HTTP_USER_AGENT'];


// deal with ie5/6 bug
if (preg_match('/MSIE 5.5/', $browser) || preg_match('/MSIE 6.0/', $browser)) {
	header('Content-Disposition: filename="'.$filename.'"');
} else {
	header('Content-Disposition: attachment; filename="'.$filename.'"');
}