轉載自:
http://bbs.freediscuz.net/bbs/viewthread.php?tid=33448
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[HACK]在線列表顯示所有用戶組 1.0 For Discuz! 2.5F
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適用版本：Discuz! 2.5F
HACK作者：pk0909
最後更新：2005.02.23
修改文件：admin/misc.php、index.php、forumdisplay.php
修改模版：無
安裝難易：易
技術支持：www.freediscuz.net/bbs
功能簡述：2.5F原始版本只能定制部分用戶組（系統組、特殊組，且不包含遊客）的在線列表顯示，此hack可讓你自定義所有可顯示的用戶組，甚至不同級別的普通會員也可以以不同的圖標在在線列表中顯示
修改提示：下面的修改方法後面都將添加一定的注釋，對於不需要顯示遊客的人，將只修改一個文件（admin/misc.php）
修改步驟
1. 修改 admin/misc.php
$query = $db->query("SELECT groupid, grouptitle FROM $table_usergroups WHERE groupid<>'7' AND type<>'member'");
對於需要顯示遊客的人，改成
//$query = $db->query("SELECT groupid, grouptitle FROM $table_usergroups WHERE groupid<>'7' AND type<>'member'");
//(display all group) by pk0909 2005-2-23 start 1/1
$query = $db->query("SELECT groupid, grouptitle FROM $table_usergroups");
//(display all group) by pk0909 2005-2-23 end 1/1
對於不需要顯示遊客的人，改成
//$query = $db->query("SELECT groupid, grouptitle FROM $table_usergroups WHERE groupid<>'7' AND type<>'member'");
//(display all group) by pk0909 2005-2-23 start 1/1
$query = $db->query("SELECT groupid, grouptitle FROM $table_usergroups WHERE groupid<>'7'");
//(display all group) by pk0909 2005-2-23 end 1/1
2. 修改index.php （不需要顯示遊客的人請忽略，這裏把遊客叫做Guest，你可以自己改名）
之下添加：
//(display all group) by pk0909 2005-2-23 start 1/1
if (isset($_DCACHE['onlinelist'][7])) {
$online['icon'] = $_DCACHE['onlinelist'][7];
$online['username'] = 'Guest';
$online['fid'] = $online['fid'] ? $forumname[$online['fid']] : 0;
$online['action'] = $actioncode[$online['action']];
$online['lastactivity'] = gmdate($timeformat, $online['lastactivity'] + ($timeoffset * 3600));
$whosonline[] = $online;
}
//(display all group) by pk0909 2005-2-23 end 1/1
3. 修改forumdisplay.php （不需要顯示遊客的人請忽略，，這裏把遊客叫做Guest，你可以自己改名）
$query = $db->query("SELECT uid, groupid, username, invisible, lastactivity, action FROM $table_sessions WHERE uid>'0' AND fid='$fid' AND invisible='0'");
改成
//$query = $db->query("SELECT uid, groupid, username, invisible, lastactivity, action FROM $table_sessions WHERE uid>'0' AND fid='$fid' AND invisible='0'");
//(display all group) by pk0909 2005-2-23 start 1/2
$query = $db->query("SELECT uid, groupid, username, invisible, lastactivity, action FROM $table_sessions WHERE fid='$fid' AND invisible='0'");
//(display all group) by pk0909 2005-2-23 end 1/2
再找
$online['icon'] = isset($_DCACHE['onlinelist'][$online['groupid']]) ? $_DCACHE['onlinelist'][$online['groupid']] : $_DCACHE['onlinelist'][0];
改成
//$online['icon'] = isset($_DCACHE['onlinelist'][$online['groupid']]) ? $_DCACHE['onlinelist'][$online['groupid']] : $_DCACHE['onlinelist'][0];
//(display all group) by pk0909 2005-2-23 start 2/2
if ($online['uid']) {
$online['icon'] = isset($_DCACHE['onlinelist'][$online['groupid']]) ? $_DCACHE['onlinelist'][$online['groupid']] : $_DCACHE['onlinelist'][0];
} elseif (isset($_DCACHE['onlinelist'][7])) {
$online['icon'] = $_DCACHE['onlinelist'][7];
$online['username'] = 'Guest';
}
//(display all group) by pk0909 2005-2-23 end 2/2
幾點說明：
1. 必須在後臺的 “在線列表定制” 中設置了遊客的圖片，遊客才會顯示
2. 顯示在線列表的時候不進行排序，效率上比排序要高
