I've just looked through the original PHPBB2 and I've found this:

// Handle marking posts
//
if ( $mark_read == 'topics' )
{
if ( $userdata['session_logged_in'] )
{
$sql = "SELECT MAX(post_time) AS last_post
FROM " . POSTS_TABLE . "
WHERE forum_id = $forum_id";
if ( !($result = $db->sql_query($sql)) )
{
message_die(GENERAL_ERROR, 'Could not obtain forums information', '', __LINE__, __FILE__, $sql);
}

if ( $row = $db->sql_fetchrow($result) )
{
$tracking_forums = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_f']) ) ? unserialize($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_f']) : array();
$tracking_topics = ( isset($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_t']) ) ? unserialize($HTTP_COOKIE_VARS[$board_config['cookie_name'] . '_t']) : array();

if ( ( count($tracking_forums) + count($tracking_topics) ) >= 150 && empty($tracking_forums[$forum_id]) )
{
asort($tracking_forums);
unset($tracking_forums[key($tracking_forums)]);
}

if ( $row['last_post'] > $userdata['user_lastvisit'] )
{
$tracking_forums[$forum_id] = time();

setcookie($board_config['cookie_name'] . '_f', serialize($tracking_forums), 0, $board_config['cookie_path'], $board_config['cookie_domain'], $board_config['cookie_secure']);
}
}

$template->assign_vars(array(
'META' => '<meta http-equiv="refresh" content="3;url=' . append_sid("viewforum.$phpEx?" . POST_FORUM_URL . "=$forum_id") . '">')
);
}

$message = $lang['Topics_marked_read'] . '<br /><br />' . sprintf($lang['Click_return_forum'], '<a href="' . append_sid("viewforum.$phpEx?" . POST_FORUM_URL . "=$forum_id") . '">', '</a> ');
message_die(GENERAL_MESSAGE, $message);
}
//
// End handle marking posts
//

This is the code that Marks all topics as read, can anyone convert that to Xoops?

Hi,

I have been looking, with no luck, to find a hack for the newbb module.

A button, link or whatever, that can mark every post as read so that U don't have to stat all over when you are on another PC.

Someone who can help me?