Newest log first, and 'fuzy math.'

[strago]

define("DOWNLOADS_FILE","/public_html/downloads.html");

$downloadsEntry = "<center><A HREF=http://www.domain.com/v/$v/>$v</a><HR></center>\n";

$lines = file(DOWNLOADS_FILE);
$lines[] = $downloadsEntry;
$last40 = array_slice($lines, -40);
file_put_contents(DOWNLOADS_FILE, implode("", $last40));
    {
        $downloadsFile = fopen(DOWNLOADS_FILE,"a");
    }
//    fwrite($downloadsFile,$downloadsEntry);
    fclose($downloadsFile);

 

This logs the last 20 downloads. The newest download is added at the bottom of the file. How do you change it so the newest log is added at the top of the file, so it's listed first using

 

echo <<< END
  <H1>Last 20 Downloads</H1>
END;
  include('downloads.html');

 

And how do you make it so '20' actually means '20'? Right now you have to have '40' to get '20' logs.