File download thing

file-handler.php

<?php
header( 'Cache-Control: no-cache, no-store' );
header( 'User-Agent: My Cool Download Script' );
header( 'Content-Disposition: inline; filename=TARGET_FILENAME_WITH_NO_PATH' );
header( 'Content-type: MIME_TYPE_OF_FILE;charset=CHARSET_OF_FILE' );
header( 'Vary: Accept-Encoding' );
header( 'Keep-Alive: timeout=15, max=1024' );
header( 'Connection: Keep-Alive' );

// readfile() or echo contents of file, whatever
echo 'HELLO FILE CONTENTS';
exit();