Max loggedin users in footer

[n1ckn4me]

PHP Code:

// ### MAX LOGGEDIN USERS ################################
if (intval($vbulletin->maxloggedin['maxonline']) <= $totalonline)
{
    $vbulletin->maxloggedin['maxonline'] = $totalonline;
    $vbulletin->maxloggedin['maxonlinedate'] = TIMENOW;
    build_datastore('maxloggedin', serialize($vbulletin->maxloggedin));
}
$recordusers = $vbulletin->maxloggedin['maxonline'];
$recorddate = vbdate($vbulletin->options['dateformat'], $vbulletin->maxloggedin['maxonlinedate'], true);
$recordtime = vbdate($vbulletin->options['timeformat'], $vbulletin->maxloggedin['maxonlinedate']);

$currenttime = vbdate($vbulletin->options['timeformat']);
$metarefresh = ''; 


I have $vbphrase[most_users_ever_online_was_x_y_at_z] phrase in my $footer and with the above phpcode I want to active that, but I don't know in witch file to put it? Also...is this code valid?

Side question: Is it true that I can remove the javascript code (time) and still make it work with the above phpcode? (Just trying to understand how it all works )