header("Content-Type: application/octet-stream");
        header("Content-Disposition: attachment; filename=\"qub_template_glossary.tpa\"");

        print $l_Result;
        exit;

HTTP/1.1 200 OK
Date: Fri, 05 Oct 2007 11:46:20 GMT
Server: Apache/1.3.33 (Win32) PHP/4.4.4
X-Powered-By: PHP/4.4.4
Set-Cookie: PHPSESSID=7fe45c19a630d6dd3b721fa9b38a7bb3; path=/
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-check=0
Pragma: no-cache
Content-Disposition: attachment; filename="qub_template_glossary.tpa"
Connection: close
Content-Type: application/octet-stream

line1
line2
line3
….