sources/BoardIndex.php

pesquisar por
$context['num_users_online'] = count($context['users_online']) + $context['num_users_hidden'];
Colocar este codigo
// Load the users online today.
$nowdate = @getdate(forum_time(false));
$midnight = mktime(0, 0, 0, $nowdate['mon'], $nowdate['mday'], $nowdate['year']) - ($modSettings['time_offset'] * 3600);

$s = strpos($user_info['time_format'], '%S') === false ? '' : ':%S';
if (strpos($user_info['time_format'], '%H') === false && strpos($user_info['time_format'], '%T') === false)
$time_fmt = '%I:%M' . $s . ' %p';
else
$time_fmt = '%H:%M' . $s;

$result = db_query("
SELECT
mem.ID_MEMBER, mem.lastLogin, mem.realName, mem.memberName, mem.showOnline,
mg.onlineColor, mg.ID_GROUP, mg.groupName
FROM {$db_prefix}members AS mem
LEFT JOIN {$db_prefix}membergroups AS mg ON (mg.ID_GROUP = IF(mem.ID_GROUP = 0, mem.ID_POST_GROUP, mem.ID_GROUP)) WHERE mem.lastLogin >= $midnight", __FILE__, __LINE__);

$context['num_hidden_users_online_today'] = 0;
$context['users_online_today'] = array();
$context['list_users_online_today'] = array();

while ($row = mysql_fetch_assoc($result))
{
if (empty($row['showOnline']))
{
$context['num_hidden_users_online_today'] = $context['num_hidden_users_online_today'] + 1;
if (!allowedTo('moderate_forum')) continue;
}

$userday = strftime('%d', forum_time(true));
$loginday = strftime('%d', forum_time(true, $row['lastLogin']));
$yesterday = $userday == $loginday ? '' : $txt['uot_yesterday'];

$lastLogin = $yesterday . strftime($time_fmt, forum_time(true, $row['lastLogin']));
$title = ' title="' . $lastLogin . '"';

// Some basic color coding...
if (!empty($row['onlineColor']))
$link = '<a href="' . $scripturl . '?action=profile;u=' . $row['ID_MEMBER'] . '"' . $title . ' style="color: ' . $row['onlineColor'] . ';">' . $row['realName'] . '</a>';
else
$link = '<a href="' . $scripturl . '?action=profile;u=' . $row['ID_MEMBER'] . '"' . $title . '>' . $row['realName'] . '</a>';

$is_buddy = in_array($row['ID_MEMBER'], $user_info['buddies']);
if ($is_buddy)
{
$link = '<b>' . $link . '</b>';
}

$context['users_online_today'][$row['lastLogin'] . $row['memberName']] = array(
'id' => $row['ID_MEMBER'],
'username' => $row['memberName'],
'name' => $row['realName'],
'group' => $row['ID_GROUP'],
'href' => $scripturl . '?action=profile;u=' . $row['ID_MEMBER'],
'link' => $link,
'is_buddy' => $is_buddy,
'hidden' => empty($row['showOnline']),
);

$context['list_users_online_today'][$row['lastLogin'] . $row['memberName']] = empty($row['showOnline']) ? '<i>' . $link . '</i>' : $link;
}
mysql_free_result($result);

krsort($context['users_online_today']);
krsort($context['list_users_online_today']);

$context['num_users_online_today'] = count($context['users_online_today']);
if (!allowedTo('moderate_forum'))
{
$context['num_users_online_today'] = $context['num_users_online_today'] + $context['num_hidden_users_online_today'];
}
sources/Stats.php

$context['online_today'] = (int) $context['online_today'];
// Total members online today
$frag = explode('-', strftime('%Y-%m-%d', time()));
$midnight = forum_time(false, mktime(0, 0, 0, (int) $frag[1], (int) $frag[2], (int) $frag[0]));
$result = db_query("
SELECT
COUNT(*)
FROM {$db_prefix}members
WHERE lastLogin >= $midnight", __FILE__, __LINE__);
list ($context['total_users_online_today']) = mysql_fetch_row($result);
teutema/BoardIndex.template.php

', $txt['most_online_ever'], ': ', $modSettings['mostOnline'], ' (' , timeformat($modSettings['mostDate']), ')
</span>
</td>
</tr>';
// Users online today

echo '
<tr>
<td class="titlebg" colspan="2">', $txt['uot_users_online_today_title'], '</td>
</tr><tr>
<td class="windowbg" width="20" valign="middle" align="center">
<img src="', $settings['images_url'], '/icons/online.gif" alt="', $txt[158], ' ', $txt['uot_users_online_today_title'], '" border="0" />
</td>
<td class="windowbg2" width="100%">';

echo '
<div class="smalltext">';

  echo $txt['uot_total'], ': <b>', $context['num_users_online_today'], '</b>';
  if (!$context['user']['is_guest'])
  echo ' (', $txt['uot_visible'], ': ', ($context['num_users_online_today'] - $context['num_hidden_users_online_today']), ', ', $txt['uot_hidden'], ': ', $context['num_hidden_users_online_today'], ')';

// Assuming there ARE users online... each user in users_online has an id, username, name, group, href, and link.
if (!empty($context['users_online_today']) && !$context['user']['is_guest'])
echo '<br />', implode(', ', $context['list_users_online_today']);

echo '
<br />', $context['show_stats'] && !$settings['show_sp1_info'] ? '
<a href="' . $scripturl . '?action=stats">' . $txt['smf223'] . '</a>' : '', '
</div>
</td>
</tr>';
Stats.template.php

<td nowrap="nowrap">', $txt['users_online_today'], ':</td>
<td align="right">', $context['online_today'], '</td>';
<td nowrap="nowrap">', $txt['users_online_today'], ':</td>
<td align="right">', $context['online_today'], '</td>
</tr><tr>
<td nowrap="nowrap">', $txt['uot_total_users_online_today'], ':</td>
<td align="right">', $context['total_users_online_today'], '</td>';

languages/Modifications.portuguese.php

?>
$txt['uot_users_online_today_title']='Membros Online Hoje';
$txt['uot_total_users_online_today']='Total membros online Hoje';
$txt['uot_yesterday']='Ontem: ';
$txt['uot_total']='Total';
$txt['uot_visible']='Normal';
$txt['uot_hidden']='Escondido'
se tiver algumas dificuldades pode postar aqui