Use this code to force a download of any type of content with PHP

header("Content-type:application/octect-stream");
header('Content-Disposition: attachment; filename=filename_' . date('Y-m-d') . '.sql');
print "Hello World";

Show the headers of an URL from the command line. This will need perl, lwp installed on the system.

lwp-request -ed "http:/lindesk.com/"

URL Headers using Curl

301 Redirect using PHP

header ('HTTP/1.1 301 Moved Permanently');
header ('Location: '.$new_location);