discuz X3.2 forum_index.php详解

<?php

/**

* [Discuz!] (C)2001-2099 Comsenz Inc.

* This is NOT a freeware, use is subject to license terms

*

* $Id: forum_index.php 29580 2012-04-20 02:53:59Z svn_project_zhangjie $

*/

//mod文件只能被入口文件引用，不能直接访问

if(!defined('IN_DISCUZ')) {

exit('Access Denied');

}

/**

* 返回库文件的全路径

*

* @param string $libname 库文件分类及名称

* @param string $folder 模块目录'module','include','class'

* @return string

*

* @example require DISCUZ_ROOT.'./source/function/function_cache.php'

* @example 我们可以利用此函数简写为：require libfile('function/cache');

* 再如：require_once libfile('space/'.$do, 'include');//包含 "/source/include/space/space_profile.php" 文件

* 1、libfile函数返回库文件的全路径

* 2、包含文件路径格式："/source/include/space/space_$do.php"

* 3、require_once "返回的库文件的全路径",这样就可以将库文件包含进来

*/

require_once libfile('function/forumlist');//引入"/source/function/function_forumlist.php"函数库文件

$gid = intval(getgpc('gid'));//默认值为0:分区id;何为分区?简单说,就是凌驾与版块之上的一个分类

$showoldetails = get_index_online_details();//默认情况下为空值，不知道怎么回事

//论坛首页缓存更细时间,0-不开启

//uid-管理员id gid-分区id cacheindexlife-首页缓存时间

//gid为空的情况

if(!$_G['uid'] && !$gid && $_G['setting']['cacheindexlife'] && !defined('IN_ARCHIVER') && !defined('IN_MOBILE')) {

get_index_page_guest_cache();//此代码只针对游客

}

$newthreads = round((TIMESTAMP - $_G['member']['lastvisit'] + 600) / 1000) * 1000;

//初始化数组变量

$catlist = $forumlist = $sublist = $forumname = $collapse = $favforumlist = array();

//初始化普通变量：主题、帖子、今日帖子、短消息

$threads = $posts = $todayposts = $announcepm = 0;

//定义发帖数量

$postdata = $_G['cache']['historyposts'] ? explode("\t", $_G['cache']['historyposts']) : array(0,0);

$postdata[0] = intval($postdata[0]);//昨日发帖

$postdata[1] = intval($postdata[1]);//历史最高发帖

//创建站点栏目名称、描述、关键字

list($navtitle, $metadescription, $metakeywords) = get_seosetting('forum');

if(!$navtitle) {//$navtitle-默认值为“论坛”

$navtitle = $_G['setting']['navs'][2]['navname'];

$nobbname = false;

} else {

//默认执行

$nobbname = true;

}

//描述

if(!$metadescription) {

$metadescription = $navtitle;

}

//关键字

if(!$metakeywords) {

$metakeywords = $navtitle;

}

//heatthread：热帖

if($_G['setting']['indexhot']['status'] && $_G['cache']['heats']['expiration'] < TIMESTAMP) {

require_once libfile('function/cache');//引入"/source/function/function_cache.php"函数库文件

updatecache('heats');

}

if($_G['uid'] && empty($_G['cookie']['nofavfid'])) {

$favfids = array();

$forum_favlist = C::t('home_favorite')->fetch_all_by_uid_idtype($_G['uid'], 'fid');

if(!$forum_favlist) {

dsetcookie('nofavfid', 1, 31536000);

}

foreach($forum_favlist as $key => $favorite) {

if(defined('IN_MOBILE')) {

$forum_favlist[$key]['title'] = strip_tags($favorite['title']);

}

$favfids[] = $favorite['id'];

}

if($favfids) {

$favforumlist = C::t('forum_forum')->fetch_all($favfids);

foreach($favforumlist as $id => $forum) {

forum($favforumlist[$id]);

}

}

}

//默认情况下不执行,即:直接跳过这段if代码段

if(empty($gid) && empty($_G['member']['accessmasks']) && empty($showoldetails)) {

extract(get_index_memory_by_groupid($_G['member']['groupid']));

if(defined('FORUM_INDEX_PAGE_MEMORY') && FORUM_INDEX_PAGE_MEMORY) {

categorycollapse();

if(!defined('IN_ARCHIVER')) {

include template('diy:forum/discuz');//引入模板文件的方式

} else {

include loadarchiver('forum/discuz');

}

dexit();

}

}

//默认情况下执行此if代码段；FORUM_INDEX_PAGE_MEMORY是首页所有缓存数据的一个常量

//gid为空的情况 FORUM_INDEX_PAGE_MEMORY常量

if(!$gid && (!defined('FORUM_INDEX_PAGE_MEMORY') || !FORUM_INDEX_PAGE_MEMORY)) {

/*格式：

* <li><span><a href="">公告1</a></span></li>

* <li><span><a href="">公告2</a></span></li>

*/

$announcements = get_index_announcements();//首页公告，此函数的定义在当前文件底部

//通过状态值查询所有开启的版块或分区相关信息，可查看桌面$forums = Ct('forum_forum')-fetch_all_by_status(1）.txt文件

//对应pre_forum_forum数据表中的记录

$forums = C::t('forum_forum')->fetch_all_by_status(1);

//初始化一个数组变量

$fids = array();

foreach($forums as $forum) {//$forum-代表每一个开启的分区或版块相关的信息数组,一般为一维数组

//分区或版块id数组,格式:$fid[分区或版块id]=分区或版块id;$fids[1]=1

$fids[$forum['fid']] = $forum['fid'];//启用的分区id或版块id

}

//初始化一个版块访问权限数组变量

$forum_access = array();

if(!empty($_G['member']['accessmasks'])) {//用户访问权限标志，默认值为1

$forum_access = C::t('forum_access')->fetch_all_by_fid_uid($fids, $_G['uid']);

}

//获取版块扩展字段信息，对应数据表:pre_forum_forumfield,查看桌面 $forum_fields.txt文件

$forum_fields = C::t('forum_forumfield')->fetch_all($fids);

foreach($forums as $forum) {

if($forum_fields[$forum['fid']]['fid']) {//分区或版块id

//将分区或版块的通用信息字段或扩展字段信息合并在一起

//即将pre_forum_forum表的字段与pre_forum_fields表的字段合并在一起

$forum = array_merge($forum, $forum_fields[$forum['fid']]);//一维数组

}

if($forum_access['fid']) {

$forum = array_merge($forum, $forum_access[$forum['fid']]);

}

//版块或分区的名称

$forumname[$forum['fid']] = strip_tags($forum['name']);

//反序列化的pre_forum_forumfields表中extra字段的值

$forum['extra'] = empty($forum['extra']) ? array() : dunserialize($forum['extra']);

if(!is_array($forum['extra'])) {

$forum['extra'] = array();//数组

}

//版块的情况，不包括分区的情况

if($forum['type'] != 'group') {//版块数组信息的情况 group-分区 forum-版块

$threads += $forum['threads'];//主题数量

$posts += $forum['posts'];//帖子数量

$todayposts += $forum['todayposts'];//今日发帖数量

//版块的情况

if($forum['type'] == 'forum' && isset($catlist[$forum['fup']])) {//版块存在上级分区的情况

//forum函数的定义位置："/source/function/function_forumlist.php"函数库文件

if(forum($forum)) {

$catlist[$forum['fup']]['forums'][] = $forum['fid'];//分区下的所有的版块id

/*如下形式：

* [forums] => Array //当前分区下版块id数组,即是fid数组

(

[0] => 2 //娱乐

[1] => 36 //文化

[2] => 37 //体育

[3] => 38 //艺术

[4] => 39 //商界

)

*/

//排序id

$forum['orderid'] = $catlist[$forum['fup']]['forumscount']++;

//子版块

$forum['subforums'] = '';

$forumlist[$forum['fid']] = $forum;//仅版块数组 $forumlist,可查看桌面$forumlist.txt文件

}

} elseif(isset($forumlist[$forum['fup']])) {//$forum['fup']=64 的情况，即：女装版块

//女装版块下的子版块数组信息

$forumlist[$forum['fup']]['threads'] += $forum['threads'];//主题数量

$forumlist[$forum['fup']]['posts'] += $forum['posts'];//帖子数量

$forumlist[$forum['fup']]['todayposts'] += $forum['todayposts'];//今日发帖数

if($_G['setting']['subforumsindex'] && $forumlist[$forum['fup']]['permission'] == 2 && !($forumlist[$forum['fup']]['simple'] & 16) || ($forumlist[$forum['fup']]['simple'] & 8)) {

//绑定的域名

$forumurl = !empty($forum['domain']) && !empty($_G['setting']['domain']['root']['forum']) ? 'http://'.$forum['domain'].'.'.$_G['setting']['domain']['root']['forum'] : 'forum.php?mod=forumdisplay&fid='.$forum['fid'];

$forumlist[$forum['fup']]['subforums'] .= (empty($forumlist[$forum['fup']]['subforums']) ? '' : ', ').'<a href="'.$forumurl.'" '.(!empty($forum['extra']['namecolor']) ? ' style="color: ' . $forum['extra']['namecolor'].';"' : '') . '>'.$forum['name'].'</a>';

}

}

} else {//分区的情况,不包含版块的情况

if($forum['moderators']) {//版主

$forum['moderators'] = moddisplay($forum['moderators'], 'flat');

}

$forum['forumscount'] = 0;

$catlist[$forum['fid']] = $forum;//分区数组信息

}

}

//销毁不用的数组变量

unset($forum_access, $forum_fields);

//循环分区二维数组信息 分区id 一维数组分区信息

foreach($catlist as $catid => $category) {

$catlist[$catid]['collapseimg'] = 'collapsed_no.gif';//伸张或收缩图片

if($catlist[$catid]['forumscount'] && $category['forumcolumns']) {

$catlist[$catid]['forumcolwidth'] = (floor(100 / $category['forumcolumns']) - 0.1).'%';

$catlist[$catid]['endrows'] = '';

if($colspan = $category['forumscount'] % $category['forumcolumns']) {

while(($category['forumcolumns'] - $colspan) > 0) {

$catlist[$catid]['endrows'] .= '<td width="'.$catlist[$catid]['forumcolwidth'].'"> </td>';

$colspan ++;

}

$catlist[$catid]['endrows'] .= '</tr>';

}

} elseif(empty($category['forumscount'])) {

unset($catlist[$catid]);

}

}

unset($catid, $category);

if(isset($catlist[0]) && $catlist[0]['forumscount']) {

$catlist[0]['fid'] = 0;

$catlist[0]['type'] = 'group';

$catlist[0]['name'] = $_G['setting']['bbname'];

$catlist[0]['collapseimg'] = 'collapsed_no.gif';

} else {

unset($catlist[0]);

}

if(!IS_ROBOT && ($_G['setting']['whosonlinestatus'] == 1 || $_G['setting']['whosonlinestatus'] == 3)) {

$_G['setting']['whosonlinestatus'] = 1;

$onlineinfo = explode("\t", $_G['cache']['onlinerecord']);//在线访问记录.Array ( [0] => 2 [1] => 1378968576 )

if(empty($_G['cookie']['onlineusernum'])) {//在线用户数

$onlinenum = C::app()->session->count();

if($onlinenum > $onlineinfo[0]) {

$onlinerecord = "$onlinenum\t".TIMESTAMP;

C::t('common_setting')->update('onlinerecord', $onlinerecord);

savecache('onlinerecord', $onlinerecord);

$onlineinfo = array($onlinenum, TIMESTAMP);

}

dsetcookie('onlineusernum', intval($onlinenum), 300);

} else {

$onlinenum = intval($_G['cookie']['onlineusernum']);

}

$onlineinfo[1] = dgmdate($onlineinfo[1], 'd');

$detailstatus = $showoldetails == 'yes' || (((!isset($_G['cookie']['onlineindex']) && !$_G['setting']['whosonline_contract']) || $_G['cookie']['onlineindex']) && $onlinenum < 500 && !$showoldetails);

$guestcount = $membercount = 0;

if(!empty($_G['setting']['sessionclose'])) {

$detailstatus = false;

$membercount = C::app()->session->count(1);

$guestcount = $onlinenum - $membercount;

}

if($detailstatus) {

$actioncode = lang('action');

$_G['uid'] && updatesession();

$whosonline = array();

$_G['setting']['maxonlinelist'] = $_G['setting']['maxonlinelist'] ? $_G['setting']['maxonlinelist'] : 500;

foreach(C::app()->session->fetch_member(1, 0, $_G['setting']['maxonlinelist']) as $online){

$membercount ++;

if($online['invisible']) {

$invisiblecount++;

continue;

} else {

$online['icon'] = !empty($_G['cache']['onlinelist'][$online['groupid']]) ? $_G['cache']['onlinelist'][$online['groupid']] : $_G['cache']['onlinelist'][0];

}

$online['lastactivity'] = dgmdate($online['lastactivity'], 't');

$whosonline[] = $online;

}

if(isset($_G['cache']['onlinelist'][7]) && $_G['setting']['maxonlinelist'] > $membercount) {

foreach(C::app()->session->fetch_member(2, 0, $_G['setting']['maxonlinelist'] - $membercount) as $online){

$online['icon'] = $_G['cache']['onlinelist'][7];

$online['username'] = $_G['cache']['onlinelist']['guest'];

$online['lastactivity'] = dgmdate($online['lastactivity'], 't');

$whosonline[] = $online;

}

}

unset($actioncode, $online);

if($onlinenum > $_G['setting']['maxonlinelist']) {

$membercount = C::app()->session->count(1);

$invisiblecount = C::app()->session->count_invisible();

}

if($onlinenum < $membercount) {

$onlinenum = C::app()->session->count();

dsetcookie('onlineusernum', intval($onlinenum), 300);

}

$invisiblecount = intval($invisiblecount);

$guestcount = $onlinenum - $membercount;

unset($online);

}

} else {

$_G['setting']['whosonlinestatus'] = 0;

}

if(defined('FORUM_INDEX_PAGE_MEMORY') && !FORUM_INDEX_PAGE_MEMORY) {

$key = !IS_ROBOT ? $_G['member']['groupid'] : 'for_robot';

memory('set', 'forum_index_page_'.$key, array(

'catlist' => $catlist,//分区数组列表,不包含版块,此数组对应版块扩展表及版块表-pre_forum_forumfield、pre_forum_forum的字段

'forumlist' => $forumlist,//无下级版块的版块信息数组

'sublist' => $sublist,//子版块列表

'whosonline' => $whosonline,//谁在线

'onlinenum' => $onlinenum,//在线人数

'membercount' => $membercount,//会员数

'guestcount' => $guestcount,//游客数

'announcements' => $announcements,//公告

'threads' => $threads,//主题数

'posts' => $posts,//帖子数

'todayposts' => $todayposts,//今天发表帖子数

'onlineinfo' => $onlineinfo,//在线信息

'announcepm' => $announcepm), getglobal('setting/memory/forumindex'));

}

} else {

require_once DISCUZ_ROOT.'./source/include/misc/misc_category.php';

}

if(defined('IN_ARCHIVER')) {

include loadarchiver('forum/discuz');

exit();

}

//版块伸张或收缩

categorycollapse();

/*

* 1、gid-分区id不为空的情况，如果gid为空时，不会执行下面if...else...中的代码段

* 2、$catlist：查看桌面

echo "<pre>";

print_r($catlist);

exit;

* 3、$_G['category']全局变量的生成

* 4、$_G['fid']全局变量的生成

*/

//gid不为空的情况

if($gid && !empty($catlist)) {//当前分区版块

$_G['category'] = $catlist[$gid];//gid-分区id 当前分区数组数据，包括所有的子版块fid

$forumseoset = array(//当前分区的SEO设置

'seotitle' => $catlist[$gid]['seotitle'],//分区SEO标题

'seokeywords' => $catlist[$gid]['keywords'],//分区SEO关键字

'seodescription' => $catlist[$gid]['seodescription']//分区SEO描述

);

$seodata = array('fgroup' => $catlist[$gid]['name']);//当前分区名称

//生成当前分区的SEO信息

list($navtitle, $metadescription, $metakeywords) = get_seosetting('threadlist', $seodata, $forumseoset);

if(empty($navtitle)) {

$navtitle = $navtitle_g;

$nobbname = false;

} else {//默认执行

$nobbname = true;

}

$_G['fid'] = $gid;//当前分区id

}

/*

* 1、对应模板文件：/data/diy/forum/discuz.htm 或者 /template/default/forum/discuz.htm,两者选其一

* 2、使用template()函数显示已经存在的模板

* 3、格式 include template("模板文件夹/模板名称无后缀");的方式进行解析

* 4、在 source/function/function_core.php文件中定义

* 5、如：include template('forum/mytest'); //使用自定义模板套系中的forum目录的mytest.htm

*/

include template('diy:forum/discuz:'.$gid);//结果:template("diy:forum/discuz:0")

/*

* 1、获取首页公告

*/

function get_index_announcements() {

global $_G;//超级全局变量

$announcements = '';//公告变量

if($_G['cache']['announcements']) {//公告数组

$readapmids = !empty($_G['cookie']['readapmid']) ? explode('D', $_G['cookie']['readapmid']) : array();

foreach($_G['cache']['announcements'] as $announcement) {

//公告结束时间不为空，公告结束时间大于当前时间

if(!$announcement['endtime'] || $announcement['endtime'] > TIMESTAMP && (empty($announcement['groups']) || in_array($_G['member']['groupid'], $announcement['groups']))) {

if(empty($announcement['type'])) {//公告类型为空的情况

$announcements .= '<li><span><a href="forum.php?mod=announcement&id='.$announcement['id'].'" target="_blank" class="xi2">'.$announcement['subject'].

'</a></span><em>('.dgmdate($announcement['starttime'], 'd').')</em></li>';

} elseif($announcement['type'] == 1) {//公告类型为1的情况

$announcements .= '<li><span><a href="'.$announcement['message'].'" target="_blank" class="xi2">'.$announcement['subject'].

'</a></span><em>('.dgmdate($announcement['starttime'], 'd').')</em></li>';

}

}

}

}

return $announcements;

}

/*

* 1、获取游客数据缓存

*/

function get_index_page_guest_cache() {

global $_G;

$indexcache = getcacheinfo(0);

if(TIMESTAMP - $indexcache['filemtime'] > $_G['setting']['cacheindexlife']) {

@unlink($indexcache['filename']);

define('CACHE_FILE', $indexcache['filename']);

} elseif($indexcache['filename']) {

@readfile($indexcache['filename']);

$updatetime = dgmdate($indexcache['filemtime'], 'H:i:s');

$gzip = $_G['gzipcompress'] ? ', Gzip enabled' : '';

echo "<script type=\"text/javascript\">

if($('debuginfo')) {

$('debuginfo').innerHTML = '. This page is cached at $updatetime $gzip .';

}

</script>";

exit();

}

}

/*

* 1、获取论坛首页缓存

*/

function get_index_memory_by_groupid($key) {

$enable = getglobal('setting/memory/forumindex');

if($enable !== null && memory('check')) {

if(IS_ROBOT) {

$key = 'for_robot';

}

$ret = memory('get', 'forum_index_page_'.$key);

define('FORUM_INDEX_PAGE_MEMORY', $ret ? 1 : 0);

if($ret) {

return $ret;

}

}

return array('none' => null);

}

/*

* 1、获取首页在线信息详情

*/

function get_index_online_details() {

$showoldetails = getgpc('showoldetails');

switch($showoldetails) {

case 'no': dsetcookie('onlineindex', ''); break;

case 'yes': dsetcookie('onlineindex', 1, 86400 * 365); break;

}

return $showoldetails;

}

/*

* 1、版块绑定的域名

*/

function do_forum_bind_domains() {

global $_G;

if($_G['setting']['binddomains'] && $_G['setting']['forumdomains']) {

$loadforum = isset($_G['setting']['binddomains'][$_SERVER['HTTP_HOST']]) ? max(0, intval($_G['setting']['binddomains'][$_SERVER['HTTP_HOST']])) : 0;

if($loadforum) {

dheader('Location: '.$_G['setting']['siteurl'].'/forum.php?mod=forumdisplay&fid='.$loadforum);

}

}

}

//版块伸张或收缩功能函数

function categorycollapse() {

global $_G, $collapse, $catlist;

if(!$_G['uid']) {

return;

}

//此时 fid-分区id forum-可以查看桌面

//如果是首页,那么就会有多个分区

foreach($catlist as $fid => $forum) {

if(!isset($_G['cookie']['collapse']) || strpos($_G['cookie']['collapse'], '_category_'.$fid.'_') === FALSE) {

$catlist[$fid]['collapseimg'] = 'collapsed_no.gif';

$collapse['category_'.$fid] = '';

} else {

$catlist[$fid]['collapseimg'] = 'collapsed_yes.gif';//伸展或收缩图片

$collapse['category_'.$fid] = 'display: none';//跟html标签的id属性值有关

}

}

if(!isset($_G['cookie']['collapse']) || strpos($_G['cookie']['collapse'], '_category_0_') === FALSE) {

$collapse['collapseimg_0'] = 'collapsed_no.gif';//伸展或收缩图片

$collapse['category_0'] = '';

} else {

$collapse['collapseimg_0'] = 'collapsed_yes.gif';//伸展或收缩图片

$collapse['category_0'] = 'display: none';

}

}

?>