/**
     * topic rss feed, 10 latest posts in the topic
     *	@param $forum_id	forum id	
     */
    function getRssTopic($topic_id)
    {
        global $gConf;
        $topic_id = (int) $topic_id;
        $gConf['topics_per_page'] = 10;
        $gConf['date_format'] = '%a, %e %b %Y %k:%i:%s GMT';
        $fdb = new DbForum();
        $t = $fdb->getTopic($topic_id);
        if (!$t) {
            exit;
        }
        $a = $fdb->getPosts($topic_id, 0);
        reset($a);
        $items = '';
        $lastBuildDate = '';
        while (list(, $r) = each($a)) {
            $lp = $fdb->getTopicPost($r['topic_id'], 'last');
            $td = strip_tags(substr($r['post_text'], 0, 256));
            if (strlen($td) == 256) {
                $td .= '[...]';
            }
            $tt = substr($td, 0, 32);
            $lastBuildDate = $lp['when'];
            $items .= <<<EOF
\t\t\t<item>
\t\t\t\t<title>{$tt}</title>
\t\t\t\t<link>{$gConf['url']['base']}index.php?action=goto&amp;topic_id={$r['topic_id']}</link>
\t\t\t\t<description>{$td}</description>
\t\t\t\t<pubDate>{$lp['when']}</pubDate>
\t\t\t\t<guid>{$gConf['url']['base']}index.php?action=goto&amp;topic_id={$r['topic_id']}</guid>
\t\t\t</item>
EOF;
        }
        return <<<EOF
<rss version="2.0">
\t<channel>
\t\t<title>{$t['topic_title']}</title>
\t\t<link>{$gConf['url']['base']}index.php?action=goto&amp;topic_id={$topic_id}</link>
\t\t<description>{$t['topic_title']}</description>
\t\t<lastBuildDate>{$lastBuildDate}</lastBuildDate>\t
\t\t{$items}
\t</channel>
</rss>
EOF;
    }
 /**
  * topic rss feed, 10 latest posts in the topic
  *	@param $forum_id	forum id	
  */
 function getRssTopic($topic_uri)
 {
     global $gConf;
     $gConf['topics_per_page'] = 10;
     $gConf['date_format'] = '%a, %e %b %Y %k:%i:%s GMT';
     $fdb = new DbForum();
     $t = $fdb->getTopicByUri($topic_uri);
     $topic_id = (int) $t['topic_id'];
     if (!$t) {
         exit;
     }
     $a = $fdb->getPosts($topic_id, 0);
     reset($a);
     $items = '';
     $lastBuildDate = '';
     while (list(, $r) = each($a)) {
         $lp = $fdb->getTopicPost($r['topic_id'], 'last');
         $td = strip_tags(substr($r['post_text'], 0, 256));
         if (strlen($td) == 256) {
             $td .= '[...]';
         }
         $tt = substr($td, 0, 32);
         $lastBuildDate = $lp['when'];
         $items .= "\n\t\t\t<item>\n\t\t\t\t<title>{$tt}</title>\n\t\t\t\t<link>" . $gConf['url']['base'] . sprintf($gConf['rewrite']['topic'], $t['topic_uri']) . "</link>\n\t\t\t\t<description>{$td}</description>\n\t\t\t\t<pubDate>{$lp['when']}</pubDate>\n\t\t\t\t<guid>" . $gConf['url']['base'] . sprintf($gConf['rewrite']['topic'], $t['topic_uri']) . "#{$r['post_id']}</guid>\n\t\t\t</item>";
     }
     return "\n<rss version=\"2.0\">\n\t<channel>\n\t\t<title>{$t['topic_title']}</title>\n\t\t<link>" . $gConf['url']['base'] . sprintf($gConf['rewrite']['topic'], $t['topic_uri']) . "</link>\n\t\t<description>{$t['topic_title']}</description>\n\t\t<lastBuildDate>{$lastBuildDate}</lastBuildDate>\t\n\t\t{$items}\n\t</channel>\n</rss>";
 }