I use below code for apache :
$file = 'a.mp3';
$mime = mime_content_type($file);
header('Cache-Control: no-store, no-cache, must-revalidate, max-age=0');
header('Cache-Control: post-check=0, pre-check=0', false);
header('Pragma: no-cache');
header('Content-type: ' . $mime);
header('Content-Length: ' . filesize($file));
header('X-Sendfile: ' . $file);
exit();
But new server manager asked me change it to litespeed version
How ?