header ("Cache-Control: must-revalidate, post-check=0, pre-check=0");
        header('Content-Description: File Transfer');
        if (isset($mimes[$ext])) header("Content-Type: ".$mimes[$ext]);
        else header('Content-Type: application/octet-stream');
        header('Content-Length: ' . filesize($filename));
        header('Content-Disposition: attachment; filename=' . basename($file));
        set_time_limit(0);
        readfile($file);
        exit();


function mimeTypes() {
        $file = '/etc/mime.types';
        if (!is_file($file) || !is_readable($file)) return false;
        $types = array();
        $fp = fopen($file,"r");
        while (false != ($line = fgets($fp,4096))) {
            if (!preg_match("/^\s*(?!#)\s*(\S+)\s+(?=\S)(.+)/",$line,$match)) continue;
            $tmp = preg_split("/\s/",trim($match[2]));
            foreach($tmp as $type) $types[strtolower($type)] = $match[1];
        }
        fclose ($fp);

        return $types;
}