header('Content-Type: application/x-gtar');
        header('Content-Disposition: attachment; filename="'.basename($file).'"');
        //header('Connection: Keep-Alive');
        header('Content-Transfer-Encoding: binary');
        header('Expires: 0');
        header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
        header('Pragma: public');
        header('Content-Length: '.filesize($file));
        //readfile($file);
        set_time_limit(0);
        $f=fopen($file,"rb");
        $data='';
        while(!feof($f))
        {
                print fread($f,1024);
                //flush();
        }
        fclose($f);