function anzahl_ungelesene2(&$arr_postings, $th_id)
{
    global $u_gelesene;
    //kein Posting in Gruppe --> keine ungelesenen
    if (count($arr_postings) == 0) {
        return 0;
    }
    //kein Posting gelesen --> alle ungelesen
    if (!$u_gelesene[$th_id]) {
        return count($arr_postings);
    }
    // anzahl unterschied zwischen postings im Thread/thema und den gelesenen
    //postings des users zurueckgeben
    $sql = "select po_id, po_u_id,  po_threadorder\n                from posting\n                where po_vater_id = 0\n                and po_th_id = " . intval($th_id) . "\n                order by po_ts desc";
    $query = mysql_query($sql);
    $ungelesene = 0;
    while ($posting = mysql_fetch_array($query, MYSQL_ASSOC)) {
        if ($posting[po_threadorder] == "0") {
            $anzreplys = 0;
            $arr_postings = array($posting[po_id]);
        } else {
            $arr_postings = explode(",", $posting[po_threadorder]);
            $anzreplys = count($arr_postings);
            //Erstes Posting mit beruecksichtigen
            $arr_postings[] = $posting[po_id];
        }
        $ungelesene += anzahl_ungelesene($arr_postings, $th_id);
    }
    return $ungelesene;
}
function show_thema()
{
    global $conn;
    global $id, $http_host, $o_js, $forum_admin, $th_id, $show_tree, $seite, $farbe_link;
    global $t, $f1, $f2, $f3, $f4, $farbe_tabelle_kopf, $farbe_tabelle_kopf2, $farbe_tabellenrahmen;
    global $farbe_tabelle_zeile1, $farbe_tabelle_zeile2, $anzahl_po_seite, $chat_grafik, $farbe_text;
    global $admin, $anzahl_po_seite2, $u_id, $u_level;
    if ($anzahl_po_seite2) {
        $anzahl_po_seite2 = preg_replace("/[^0-9]/", "", $anzahl_po_seite2);
        $anzahl_po_seite = $anzahl_po_seite2;
        $f[u_forum_postingproseite] = $anzahl_po_seite2;
        if (!schreibe_db("user", $f, $u_id, "u_id")) {
            echo "Fehler beim Schreiben in DB!";
        }
    } else {
        $query = "SELECT u_forum_postingproseite FROM user WHERE u_id = '{$u_id}'";
        $result = mysql_query($query);
        $a = mysql_fetch_array($result);
        $anzahl_po_seite2 = $a['u_forum_postingproseite'];
        $anzahl_po_seite = $anzahl_po_seite2;
    }
    $leserechte = pruefe_leserechte($th_id);
    if (!$leserechte) {
        echo $t['leserechte'];
        exit;
    }
    if (!$seite) {
        $seite = 1;
    }
    $offset = ($seite - 1) * $anzahl_po_seite;
    $sql = "select po_id, po_u_id, date_format(from_unixtime(po_ts), '%d.%m.%y') as po_date,\n                date_format(from_unixtime(po_threadts), '%d.%m.%y') as po_date2,\n                po_titel, po_threadorder, po_topposting, po_threadgesperrt, po_gesperrt, u_nick,\n\t\tu_level, u_punkte_gesamt, u_punkte_gruppe, u_chathomepage\n                from posting\n                left join user on po_u_id = u_id\n                where po_vater_id = 0\n                and po_th_id = " . intval($th_id) . "\n                order by po_topposting desc, po_threadts desc, po_ts desc\n                limit {$offset}, {$anzahl_po_seite}";
    $query = mysql_query($sql, $conn);
    $th_name = show_pfad($th_id);
    echo "<table width=\"760\" cellspacing=\"0\" cellpadding=\"1\" border=\"0\" bgcolor=\"{$farbe_tabellenrahmen}\"><tr><td>\n";
    echo "<table width=\"100%\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\"><tr bgcolor=\"{$farbe_tabelle_kopf}\">\n";
    echo "<td width=\"30\"><img src=\"pics/fuell.gif\" width=\"30\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"20\"><img src=\"pics/fuell.gif\" width=\"20\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"340\"><img src=\"pics/fuell.gif\" width=\"340\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"170\"><img src=\"pics/fuell.gif\" width=\"170\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"120\"><img src=\"pics/fuell.gif\" width=\"120\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"40\"><img src=\"pics/fuell.gif\" width=\"40\" height=\"1\" border=\"0\"></td>\n";
    echo "<td width=\"40\"><img src=\"pics/fuell.gif\" width=\"40\" height=\"1\" border=\"0\"></td></tr>\n";
    echo "<tr bgcolor=\"{$farbe_tabelle_kopf}\">\n";
    echo "<td colspan=\"3\"><table width=\"390\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\">\n";
    echo "<tr><td width=\"3\"><img src=\"pics/fuell.gif\" width=\"3\" height=\"30\" border=\"0\"></td><td ><DIV style=\"color:{$farbe_text}; font-weight:bold;\">&nbsp;&nbsp;{$th_name}</DIV></td>\n";
    $schreibrechte = pruefe_schreibrechte($th_id);
    if ($schreibrechte) {
        echo "<td width=\"100\" align=\"center\">{$f3}<a style=\"color:{$farbe_text};\" href=\"forum.php?id={$id}&http_host={$http_host}&th_id={$th_id}&po_vater_id=0&aktion=thread_neu\">{$t['neuer_thread']}</a>{$f4}</td>";
    } else {
        echo "<td width=\"100\" align=\"center\">{$f3}{$t['nur_leserechte']}{$f4}</td>";
    }
    echo "<td width=\"100\" align=\"center\">{$f3}<a style=\"color:{$farbe_text};\" href=\"forum.php?id={$id}&http_host={$http_host}" . "&th_id={$th_id}&aktion=thema_alles_gelesen\">{$t['alles_gelesen']}</a>{$f4}</td>";
    echo "</tr></table></td>\n";
    echo "<td>{$f3}<DIV style=\"color:{$farbe_text}; \">{$t['autor']}</DIV>{$f4}</td>\n";
    echo "<td align=\"center\">{$f3}<DIV style=\"color:{$farbe_text}; \">{$t['datum']}<br>{$t['letztes_posting']}</DIV>{$f4}</td>\n";
    echo "<td align=\"center\">{$f3}<DIV style=\"color:{$farbe_text}; \">{$t['anzreplys']}</DIV>{$f4}</td>\n";
    echo "<td align=\"center\">{$f3}<DIV style=\"color:{$farbe_text}; \">{$t['anzneue']}</DIV>{$f4}</td></tr>\n";
    echo "<tr bgcolor=\"{$farbe_tabellenrahmen}\"><td colspan=\"7\"><img src=\"pics/fuell.gif\" width=\"1\" height=\"1\" border=\"0\"></td></tr>\n";
    $zeile = 0;
    while ($posting = mysql_fetch_array($query, MYSQL_ASSOC)) {
        set_time_limit(0);
        if ($zeile % 2) {
            $farbe = $farbe_tabelle_zeile1;
        } else {
            $farbe = $farbe_tabelle_zeile2;
        }
        if ($posting['po_threadorder'] == "0") {
            $anzreplys = 0;
            $icon = "<img src=\"pics/forum/o.gif\" width=\"20\" height=\"25\" border=\"0\">";
            $arr_postings = array($posting['po_id']);
        } else {
            $arr_postings = explode(",", $posting['po_threadorder']);
            $anzreplys = count($arr_postings);
            //Erstes Posting mit beruecksichtigen
            $arr_postings[] = $posting['po_id'];
            if ($show_tree == $posting['po_id']) {
                $icon = "<a href=\"forum.php?id={$id}&http_host={$http_host}&th_id={$th_id}&aktion=show_thema&seite={$seite}\"><img src=\"pics/forum/m.gif\" width=\"20\" height=\"25\" border=\"0\"></a>";
            } else {
                $icon = "<a href=\"forum.php?id={$id}&http_host={$http_host}&th_id={$th_id}&show_tree={$posting['po_id']}&aktion=show_thema&seite={$seite}\"><img src=\"pics/forum/p.gif\" width=\"20\" height=\"25\" border=\"0\"></a>";
            }
        }
        $ungelesene = anzahl_ungelesene($arr_postings, $th_id);
        array_pop($arr_postings);
        if ($ungelesene === 0) {
            if ($posting['po_topposting'] == 'Y') {
                $folder = $chat_grafik['forum_topthema'];
            } elseif ($posting['po_threadgesperrt'] == 'Y') {
                $folder = $chat_grafik['forum_threadgeschlossen'];
            } else {
                $folder = $chat_grafik['forum_ordnerneu'];
            }
        } elseif ($ungelesene < 11) {
            $folder = $chat_grafik['forum_ordnerblau'];
        } else {
            $folder = $chat_grafik['forum_ordnervoll'];
        }
        if ($ungelesene != 0) {
            $coli = "<font color=red>";
            $colo = "</font>";
        } else {
            $coli = "";
            $colo = "";
        }
        echo "<tr bgcolor=\"{$farbe}\"><td align=\"center\">{$folder}</nobr></td>\n";
        echo "<td align=\"center\">{$icon}</td>\n";
        if ($posting['po_gesperrt'] == 'Y' and !$forum_admin) {
            echo "<td>&nbsp;<b><font size=\"-1\" color=\"{$farbe_link}\">" . substr($posting['po_titel'], 0, 40) . "</font> <font size=\"-1\" color=\"red\">(gesperrt)</font></b></td>\n";
        } elseif ($posting['po_gesperrt'] == 'Y' and $forum_admin) {
            echo "<td>&nbsp;{$f1}<b><a href=\"forum.php?id={$id}&http_host={$http_host}&th_id={$th_id}&po_id={$posting['po_id']}&thread={$posting['po_id']}&aktion=show_posting&seite={$seite}\">" . substr($posting['po_titel'], 0, 40) . "</a></b>{$f2}  <font size=\"-1\" color=\"red\"><b>(gesperrt)</b></font></td>\n";
        } else {
            echo "<td>&nbsp;{$f1}<b><a href=\"forum.php?id={$id}&http_host={$http_host}&th_id={$th_id}&po_id={$posting['po_id']}&thread={$posting['po_id']}&aktion=show_posting&seite={$seite}\">" . substr($posting['po_titel'], 0, 40) . "</a></b>{$f2}</td>\n";
        }
        if (!$posting['u_nick']) {
            echo "<td>{$f3}<b>Nobody</b>{$f4}</td>\n";
        } else {
            $userdata = array();
            $userdata['u_id'] = $posting['po_u_id'];
            $userdata['u_nick'] = $posting['u_nick'];
            $userdata['u_level'] = $posting['u_level'];
            $userdata['u_punkte_gesamt'] = $posting['u_punkte_gesamt'];
            $userdata['u_punkte_gruppe'] = $posting['u_punkte_gruppe'];
            $userdata['u_chathomepage'] = $posting['u_chathomepage'];
            $userlink = user($posting['po_u_id'], $userdata, $o_js, FALSE, "&nbsp;", "", "", TRUE, FALSE, 29);
            if ($posting['u_level'] == 'Z') {
                echo "<td>{$f1} {$userdata['u_nick']} {$f2}</td>\n";
            } else {
                echo "<td>{$f1} {$userlink} {$f2}</td>\n";
            }
        }
        if ($posting['po_date2'] == '01.01.70' || $posting['po_date'] == $posting['po_date2']) {
            $date2 = "";
        } else {
            $date2 = "{$f3}; " . substr($posting['po_date2'], 0, 5) . "{$f4}";
        }
        echo "<td align=\"center\">{$f3}{$posting['po_date']}{$f4}{$date2}</td>\n";
        echo "<td align=\"center\">{$f3}{$anzreplys}{$f4}</td>\n";
        echo "<td align=\"center\">{$f3}{$coli}{$ungelesene}{$colo}{$f4}</td></tr>\n";
        if ($show_tree == $posting['po_id'] && $posting['po_threadorder'] != "0") {
            echo "<tr bgcolor=\"{$farbe}\"><td>&nbsp;</td><td colspan=\"6\">\n";
            zeige_baum($arr_postings, $posting['po_threadorder'], $posting['po_id']);
            echo "</td></tr>\n";
        }
        $zeile++;
    }
    echo "</table></td></tr></table>";
    show_pfad($th_id);
    show_icon_description("thema");
    echo "<br><table width=\"760\" cellspacing=\"0\" cellpadding=\"2\" border=\"0\">\n";
    echo "<tr><td>";
    echo "<form action=\"forum.php\">\n";
    echo "{$t['forum_postingsproseite']} <input name=\"anzahl_po_seite2\" size=\"3\" maxlength=\"4\" value=\"{$anzahl_po_seite}\">\n";
    echo "<input type=\"hidden\" name=\"http_host\" value=\"{$http_host}\">\n";
    echo "<input type=\"hidden\" name=\"id\" value=\"{$id}\">\n";
    echo "<input type=\"hidden\" name=\"aktion\" value=\"show_thema\">\n";
    echo "<input type=\"hidden\" name=\"th_id\" value=\"{$th_id}\">\n";
    echo "<input type=\"submit\" value=\"{$t['speichern']}\">\n";
    echo "</form>\n";
    echo "</td></tr>\n";
    echo "</table>\n";
}