Discuz x3.5 核心文件 function/function_forum.php 函数注释-新秀网络验证系统 - Discuz专用api接口 - 支持二次开发 - 免费网络验证！

admin 发表于 2024-6-23 13:20:09

Discuz x3.5 核心文件 function/function_forum.php 函数注释

<?php

/**
* (C)2001-2099 Comsenz Inc.
* This is NOT a freeware, use is subject to license terms
*
* $Id: function_forum.php 36345 2017-01-12 01:55:04Z nemohou $
*/

if(!defined('IN_DISCUZ')) {
exit('Access Denied');
}
/**
* 获取指定用户的Discuz!头像
*
* @param int $uid 用户ID
* @param string $size 头像大小，可选参数，默认为空，代表默认大小
* @param bool $returnsrc 是否返回头像的URL而不是直接输出，默认为FALSE
* @return mixed 如果 $returnsrc 为 TRUE，则返回头像URL；否则直接输出头像
*/
function discuz_uc_avatar($uid, $size = '', $returnsrc = FALSE) {
global $_G;
return avatar($uid, $size, $returnsrc, FALSE, $_G['setting']['avatarmethod'], $_G['setting']['ucenterurl']);
}

/**
* 删除指定附件
*
* @param array $attach 包含附件信息的数组
* @return void
*/
function dunlink($attach) {
global $_G;
$filename = $attach['attachment'];
$havethumb = $attach['thumb'];
$remote = $attach['remote'];
if($remote) {
 ftpcmd('delete', 'forum/'.$filename);
 $havethumb && ftpcmd('delete', 'forum/'.getimgthumbname($filename));
} else {
 @unlink($_G['setting']['attachdir'].'/forum/'.$filename);
 $havethumb && @unlink($_G['setting']['attachdir'].'/forum/'.getimgthumbname($filename));
}
if($attach['aid']) {
 @unlink($_G['setting']['attachdir'].'image/'.$attach['aid'].'_100_100.jpg');
}
}

/**
* 根据给定的权限公式判断用户是否有访问权限
*
* @param string $formula 权限公式，可以是序列化的公式信息
* @return bool 如果用户有权限，则返回TRUE；否则返回FALSE
*/
function formulaperm($formula) {
global $_G;
// 初步检查，如果是版主或者管理员，则直接通过
if($_G['forum']['ismoderator']) {
 return TRUE;
}

$formula = dunserialize($formula);
$medalperm = $formula['medal'];
$permusers = $formula['users'];
$permmessage = $formula['message'];
// 检查是否启用了勋章权限控制
if($_G['setting']['medalstatus'] && $medalperm) {
 $exists = 1;
 $_G['forum_formulamessage'] = '';
 $medalpermc = $medalperm;
 if($_G['uid']) {
 $memberfieldforum = C::t('common_member_field_forum')->fetch($_G['uid']);
 $medals = explode("\t", $memberfieldforum['medals']);
 unset($memberfieldforum);
 foreach($medalperm as $k => $medal) {
 foreach($medals as $r) {
 list($medalid) = explode("|", $r);
 if($medalid == $medal) {
 $exists = 0;
 unset($medalpermc[$k]);
 }
 }
 }
 } else {
 $exists = 0;
 }
 if($medalpermc) {
 loadcache('medals');
 foreach($medalpermc as $medal) {
 if($_G['cache']['medals'][$medal]) {
 $_G['forum_formulamessage'] .= '<img src="'.$_G['cache']['medals'][$medal]['image'].'" style="vertical-align:middle;" /> '.$_G['cache']['medals'][$medal]['name'].'  ';
 }
 }
 showmessage('forum_permforum_nomedal', NULL, array('forum_permforum_nomedal' => $_G['forum_formulamessage']), array('login' => 1));
 }
}
$formulatext = $formula;
$formula = trim($formula);
// 检查是否为管理员或者版主，或者用户组有特殊权限
if($_G['adminid'] == 1 || $_G['forum']['ismoderator'] || in_array($_G['groupid'], explode("\t", $_G['forum']['spviewperm']))) {
 return FALSE;
}
if($permusers) {
 $permusers = str_replace(array("\r\n", "\r"), array("\n", "\n"), $permusers);
 $permusers = explode("\n", trim($permusers));
 if(!in_array($_G['member']['username'], $permusers)) {
 showmessage('forum_permforum_disallow', NULL, array(), array('login' => 1));
 }
}
if(!$formula) {
 return FALSE;
}
// 对公式进行解析和计算，以判断用户是否有访问权限
if(strexists($formula, '$memberformula[')) {
 preg_match_all("/\\\$memberformula\['(\w+?)'\]/", $formula, $a);
 $profilefields = array();
 foreach($a as $field) {
 switch($field) {
 case 'regdate':
 $formula = preg_replace_callback("/\{(\d{4})\-(\d{1,2})\-(\d{1,2})\}/", 'formulaperm_callback_123', $formula);
 case 'regday':
 break;
 case 'regip':
 case 'lastip':
 $formula = preg_replace("/\{(+?)\}/", "'\\1'", $formula);
 $formula = preg_replace('/(\$memberformula\[\'(regip|lastip)\'\])\s*=+\s*\'(+?)\'/', "ip::check_ip(\\1, '\\3')", $formula);
 case 'buyercredit':
 case 'sellercredit':
 space_merge($_G['member'], 'status');break;
 case substr($field, 0, 5) == 'field':
 space_merge($_G['member'], 'profile');
 $profilefields[] = $field;break;
 }
 }
 $memberformula = array();
 if($_G['uid']) {
 $memberformula = $_G['member'];
 if(in_array('regday', $a)) {
 $memberformula['regday'] = intval((TIMESTAMP - $memberformula['regdate']) / 86400);
 }
 if(in_array('regdate', $a)) {
 $memberformula['regdate'] = date('Y-m-d', $memberformula['regdate']);
 }
 $memberformula['lastip'] = $memberformula['lastip'] ? $memberformula['lastip'] : $_G['clientip'];
 } else {
 if(isset($memberformula['regip'])) {
 $memberformula['regip'] = $_G['clientip'];
 }
 if(isset($memberformula['lastip'])) {
 $memberformula['lastip'] = $_G['clientip'];
 }
 }
}
@eval("\$formulaperm = ($formula) ? TRUE : FALSE;");
if(!$formulaperm) {
 if(!$permmessage) {
 $language = lang('forum/misc');
 $search = array('regdate', 'regday', 'regip', 'lastip', 'buyercredit', 'sellercredit', 'digestposts', 'posts', 'threads', 'oltime');
 $replace = array($language['formulaperm_regdate'], $language['formulaperm_regday'], $language['formulaperm_regip'], $language['formulaperm_lastip'], $language['formulaperm_buyercredit'], $language['formulaperm_sellercredit'], $language['formulaperm_digestposts'], $language['formulaperm_posts'], $language['formulaperm_threads'], $language['formulaperm_oltime']);
 for($i = 1; $i <= 8; $i++) {
 $search[] = 'extcredits'.$i;
 $replace[] = $_G['setting']['extcredits'][$i]['title'] ? $_G['setting']['extcredits'][$i]['title'] : $language['formulaperm_extcredits'].$i;
 }
 if($profilefields) {
 loadcache(array('fields_required', 'fields_optional'));
 foreach($profilefields as $profilefield) {
 $search[] = $profilefield;
 $replace[] = !empty($_G['cache']['fields_optional']['field_'.$profilefield]) ? $_G['cache']['fields_optional']['field_'.$profilefield]['title'] : $_G['cache']['fields_required']['field_'.$profilefield]['title'];
 }
 }
 $i = 0;$_G['forum_usermsg'] = '';
 foreach($search as $s) {
 if(in_array($s, array('digestposts', 'posts', 'threads', 'oltime', 'extcredits1', 'extcredits2', 'extcredits3', 'extcredits4', 'extcredits5', 'extcredits6', 'extcredits7', 'extcredits8'))) {
 $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '    '.$replace[$i].': '.(@eval('return intval(getuserprofile(\''.$s.'\'));')) : '';
 } elseif(in_array($s, array('regdate', 'regip', 'regday'))) {
 $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '    '.$replace[$i].': '.(@eval('return $memberformula[\''.$s.'\'];')) : '';
 }
 $i++;
 }
 $search = array_merge($search, array('and', 'or', '>=', '<=', '=='));
 $replace = array_merge($replace, array('  '.$language['formulaperm_and'].'  ', '  '.$language['formulaperm_or'].'  ', '≥', '≤', '='));
 $_G['forum_formulamessage'] = str_replace($search, $replace, $formulatext);
 } else {
 $_G['forum_formulamessage'] = $permmessage;
 }

 if(!$permmessage) {
 showmessage('forum_permforum_nopermission', NULL, array('formulamessage' => $_G['forum_formulamessage'], 'usermsg' => $_G['forum_usermsg']), array('login' => 1));
 } else {
 showmessage('forum_permforum_nopermission_custommsg', NULL, array('formulamessage' => $_G['forum_formulamessage']), array('login' => 1));
 }
}
return TRUE;
}
/**
* 根据给定的公式和类型，计算用户是否满足获得勋章的条件。
*
* @param string $formula 勋章获得的计算公式，可以包含各种条件和运算符。
* @param int $type 计算类型，1代表检查是否满足获得条件，2代表检查是否满足保留条件。
* @return mixed 如果用户满足条件，返回false；如果不满足条件，返回提示信息的字符串。
*/
function medalformulaperm($formula, $type) {
global $_G;

// 解序列化公式字符串，获取公式配置
$formula = dunserialize($formula);
$permmessage = $formula['message'];
$formula = $formula['medal'];

// 检查用户组是否被允许获得该勋章
if(!empty($formula['usergroupallow']) && is_array($formula['usergroups']) && !in_array($_G['groupid'], $formula['usergroups'])) {
 loadcache('usergroups');
 // 如果用户组不允许，返回相应的用户组权限提示信息
 $message = array();
 foreach($formula['usergroups'] as $groupid) {
 $message[] = $_G['cache']['usergroups'][$groupid]['grouptitle'].' ';
 }
 $_G['forum_formulamessage'] = implode(', ', $message);
 $_G['forum_usermsg'] = $_G['cache']['usergroups'][$_G['groupid']]['grouptitle'];
 return FALSE;
}

$formulatext = $formula;
$formula = $formula;
if(!$formula) {
 return FALSE;
}

// 处理公式中的$memberformula变量
if(strexists($formula, '$memberformula[')) {
 preg_match_all("/\\\$memberformula\['(\w+?)'\]/", $formula, $a);
 $profilefields = array();
 foreach($a as $field) {
 switch($field) {
 case 'regdate':
 $formula = preg_replace_callback("/\{(\d{4})\-(\d{1,2})\-(\d{1,2})\}/", 'medalformulaperm_callback_123', $formula);
 case 'regday':
 break;
 case 'regip':
 case 'lastip':
 $formula = preg_replace("/\{(+?)\}/", "'\\1'", $formula);
 $formula = preg_replace('/(\$memberformula\[\'(regip|lastip)\'\])\s*=+\s*\'(+?)\'/', "ip::check_ip(\\1, '\\3')", $formula);
 case 'buyercredit':
 case 'sellercredit':
 space_merge($_G['member'], 'status');break;
 case substr($field, 0, 5) == 'field':
 space_merge($_G['member'], 'profile');
 $profilefields[] = $field;break;
 }
 }
 $memberformula = array();
 if($_G['uid']) {
 $memberformula = $_G['member'];
 if(in_array('regday', $a)) {
 $memberformula['regday'] = intval((TIMESTAMP - $memberformula['regdate']) / 86400);
 }
 if(in_array('regdate', $a)) {
 $memberformula['regdate'] = date('Y-m-d', $memberformula['regdate']);
 }
 $memberformula['lastip'] = $memberformula['lastip'] ? $memberformula['lastip'] : $_G['clientip'];
 } else {
 if(isset($memberformula['regip'])) {
 $memberformula['regip'] = $_G['clientip'];
 }
 if(isset($memberformula['lastip'])) {
 $memberformula['lastip'] = $_G['clientip'];
 }
 }
}

// 评估公式，并根据结果和类型返回相应的值
@eval("\$formulaperm = ($formula) ? TRUE : FALSE;");
if(!$formulaperm || $type == 1) {
 if(!$permmessage) {
 $language = lang('forum/misc');
 $search = array('regdate', 'regday', 'regip', 'lastip', 'buyercredit', 'sellercredit', 'digestposts', 'posts', 'threads', 'oltime');
 $replace = array($language['formulaperm_regdate'], $language['formulaperm_regday'], $language['formulaperm_regip'], $language['formulaperm_lastip'], $language['formulaperm_buyercredit'], $language['formulaperm_sellercredit'], $language['formulaperm_digestposts'], $language['formulaperm_posts'], $language['formulaperm_threads'], $language['formulaperm_oltime']);
 for($i = 1; $i <= 8; $i++) {
 $search[] = 'extcredits'.$i;
 $replace[] = $_G['setting']['extcredits'][$i]['title'] ? $_G['setting']['extcredits'][$i]['title'] : $language['formulaperm_extcredits'].$i;
 }
 if($profilefields) {
 loadcache(array('fields_required', 'fields_optional'));
 foreach($profilefields as $profilefield) {
 $search[] = $profilefield;
 $replace[] = !empty($_G['cache']['fields_optional']['field_'.$profilefield]) ? $_G['cache']['fields_optional']['field_'.$profilefield]['title'] : $_G['cache']['fields_required']['field_'.$profilefield]['title'];
 }
 }
 $i = 0;$_G['forum_usermsg'] = '';
 foreach($search as $s) {
 if(in_array($s, array('digestposts', 'posts', 'threads', 'oltime', 'extcredits1', 'extcredits2', 'extcredits3', 'extcredits4', 'extcredits5', 'extcredits6', 'extcredits7', 'extcredits8'))) {
 $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '    '.$replace[$i].': '.(@eval('return intval(getuserprofile(\''.$s.'\'));')) : '';
 } elseif(in_array($s, array('regdate', 'regip'))) {
 $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '    '.$replace[$i].': '.(@eval('return $memberformula[\''.$s.'\'];')) : '';
 }
 $i++;
 }
 $search = array_merge($search, array('and', 'or', '>=', '<=', '=='));
 $replace = array_merge($replace, array('  '.$language['formulaperm_and'].'  ', '  '.$language['formulaperm_or'].'  ', '≥', '≤', '='));
 $permmessage = str_replace($search, $replace, $formulatext);
 }
 if(!$formulaperm) {
 $_G['forum_formulamessage'] = $permmessage;
 }

 return $permmessage;
} elseif($formulaperm && $type == 2) {
 return FALSE;
}
return TRUE;
}

/**
* 用于公式中处理日期格式的回调函数。
*
* @param array $matches 正则匹配到的内容数组。
* @return string 返回格式化后的日期字符串。
*/
function formulaperm_callback_123($matches) {
return '\''.$matches.'-'.sprintf('%02d', $matches).'-'.sprintf('%02d', $matches).'\'';
}

/**
* 计算用户组过期时间。
*
* @param array $terms 包含用户组过期条件的数组。
* @return int 返回用户组的最短过期时间。
*/
function groupexpiry($terms) {
$terms = is_array($terms) ? $terms : dunserialize($terms);
$groupexpiry = isset($terms['main']['time']) ? intval($terms['main']['time']) : 0;
if(is_array($terms['ext'])) {
 foreach($terms['ext'] as $expiry) {
 if((!$groupexpiry && $expiry) || $expiry < $groupexpiry) {
 $groupexpiry = $expiry;
 }
 }
}
return $groupexpiry;
}

/**
* 生成论坛主题类型的下拉选择菜单。
*
* @param int $curtypeid 当前选择的类型ID。
* @return string 返回包含选择菜单的HTML代码。
*/
function typeselect($curtypeid = 0) {
global $_G;
if($threadtypes = $_G['forum']['threadtypes']) {
 $html = '<select name="typeid" id="typeid"><option value="0"> </option>';
 foreach($threadtypes['types'] as $typeid => $name) {
 $html .= '<option value="'.$typeid.'" '.($curtypeid == $typeid ? 'selected' : '').'>'.strip_tags($name).'</option>';
 }
 $html .= '</select>';
 return $html;
} else {
 return '';
}
}

/**
* 更新版主操作记录。
*
* @param string $modaction 版主操作的类型。
* @param int $posts 操作涉及的帖子数量，默认为1。
*/
function updatemodworks($modaction, $posts = 1) {
global $_G;
$today = dgmdate(TIMESTAMP, 'Y-m-d');
if($_G['setting']['modworkstatus'] && $modaction && $posts) {
 $affect_rows = C::t('forum_modwork')->increase_count_posts_by_uid_modaction_dateline(1, $posts, $_G['uid'], $modaction, $today);
 if(!$affect_rows) {
 C::t('forum_modwork')->insert(array(
 'uid' => $_G['uid'],
 'modaction' => $modaction,
 'dateline' => $today,
 'count' => 1,
 'posts' => $posts,
 ));
 }
}
}
/**
* 构建SQL语句的特定部分，用于更新指定字段的位状态。
*
* @param string $fieldname 要操作的数据库字段名。
* @param int $position 指定位子字段的位置。
* @param bool $value 指定要设置的状态值，true为启用，false为禁用。
* @return string 返回构建的SQL更新语句部分。
*/
function buildbitsql($fieldname, $position, $value) {
// 初始化SQL片段，准备设置字段值
$t = " `$fieldname`=`$fieldname`";
// 根据$value的真伪，选择性地添加设置状态的语句
if($value) {
 $t .= ' | '.setstatus($position, 1); // 启用状态
} else {
 $t .= ' & '.setstatus($position, 0); // 禁用状态
}
// 返回完整的SQL语句部分
return $t.' ';
}

/**
* 显示用户没有权限的消息
*
* @param string $type 操作类型，对应不同的权限
* @param int $fid 论坛版块ID
* @param string $formula 权限公式，可选，用于自定义权限消息
* @global array $_G 全局变量数组
* @return void 无返回值，直接输出消息并终止执行
*/
function showmessagenoperm($type, $fid, $formula = '') {
global $_G;
loadcache('usergroups'); // 加载用户组缓存

// 如果存在权限公式，则解析并获取自定义权限消息
if($formula) {
 $formula = dunserialize($formula);
 $permmessage = stripslashes($formula['message']);
}

// 初始化用户组、无权限用户组和论坛权限数组
$usergroups = $nopermgroup = $forumnoperms = array();
// 默认无权限设置
$nopermdefault = array(
 'viewperm' => array(),
 'getattachperm' => array(),
 'postperm' => array(7),
 'replyperm' => array(7),
 'postattachperm' => array(7),
);
// 权限类型数组
$perms = array('viewperm', 'postperm', 'replyperm', 'getattachperm', 'postattachperm');

// 根据用户组类型分配权限
foreach($_G['cache']['usergroups'] as $gid => $usergroup) {
 $usergroups[$gid] = $usergroup['type'];
 $grouptype = $usergroup['type'] == 'member' ? 0 : 1;
 $nopermgroup[$grouptype][] = $gid;
}

// 获取当前论坛版块信息
if($fid == $_G['forum']['fid']) {
 $forum = $_G['forum'];
} else {
 $forum = C::t('forum_forumfield')->fetch($fid);
}

// 遍历权限类型，获取每个类型的具体权限设置
foreach($perms as $perm) {
 $permgroups = explode("\t", $forum[$perm]);
 $membertype = $forum[$perm] ? array_intersect($nopermgroup, $permgroups) : TRUE;
 $forumnoperm = $forum[$perm] ? array_diff(array_keys($usergroups), $permgroups) : $nopermdefault[$perm];
 foreach($forumnoperm as $groupid) {
 $nopermtype = $membertype && $groupid == 7 ? 'login' : ($usergroups[$groupid] == 'system' || $usergroups[$groupid] == 'special' ? 'none' : ($membertype ? 'upgrade' : 'none'));
 $forumnoperms[$fid][$perm][$groupid] = array($nopermtype, $permgroups);
 }
}

// 获取当前用户组的权限信息，用于显示
$v = $forumnoperms[$fid][$type][$_G['groupid']];
$gids = $forumnoperms[$fid][$type][$_G['groupid']];
$comma = $permgroups = '';
// 拼接具有权限的用户组名称或验证类型名称
if(is_array($gids)) {
 foreach($gids as $gid) {
 if($gid && $_G['cache']['usergroups'][$gid]) {
 $permgroups .= $comma.$_G['cache']['usergroups'][$gid]['grouptitle'];
 $comma = ', ';
 } elseif($_G['setting']['verify']['enabled'] && substr($gid, 0, 1) == 'v') {
 $vid = substr($gid, 1);
 $permgroups .= $comma.$_G['setting']['verify'][$vid]['title'];
 $comma = ', ';
 }
 }
}

// 判断是否使用自定义消息
$custom = 0;
if($permmessage) {
 $message = $permmessage;
 $custom = 1;
} else {
 // 根据权限设置获取系统消息
 if($v) {
 $message = $type.'_'.$v.'_nopermission';
 } else {
 $message = 'group_nopermission';
 }
}

// 显示权限消息
showmessage($message, NULL, array('fid' => $fid, 'permgroups' => $permgroups, 'grouptitle' => $_G['group']['grouptitle']), array('login' => 1), $custom);
}
/**
* 加载论坛板块或主题
*
* 本函数用于根据提供的板块ID（fid）或主题ID（tid）加载相应的论坛数据。
* 如果没有提供fid或tid，将尝试从全局变量或GET请求中获取。
*
* @param int $fid 板块ID，如果未提供，则尝试从GET请求中获取
* @param int $tid 主题ID，如果未提供，则尝试从GET请求中获取
* @global array $_G 全局变量数组
* @return void
*/
function loadforum($fid = null, $tid = null) {
global $_G;

// 尝试从参数或GET请求中获取主题ID，并转换为整数
$tid = intval(isset($tid) ? $tid : getgpc('tid'));

// 如果提供了板块ID，则转换为整数，否则从GET请求中获取
if(isset($fid)) {
$fid = intval($fid);
} else {
$fid = getgpc('fid');
// 如果未获取到板块ID，且GET请求中存在群组ID（gid），则尝试使用群组ID
if(!$fid && getgpc('gid')) {
$fid = intval(getgpc('gid'));
}
}

if(isset($_G['forum']['fid']) && $_G['forum']['fid'] == $fid || isset($_G['thread']['tid']) && $_G['thread']['tid'] == $tid){
return null;
}
if(!empty($_GET['archiver'])) {//X1.5的Archiver兼容
if($fid) {
dheader('location: archiver/?fid-'.$fid.'.html');
} elseif($tid) {
dheader('location: archiver/?tid-'.$tid.'.html');
} else {
dheader('location: archiver/');
}
}
if(defined('IN_ARCHIVER') && $_G['setting']['archiverredirect'] && !IS_ROBOT) {
dheader('location: ../forum.php'.($_G['mod'] ? '?mod='.$_G['mod'].(!empty($_GET['fid']) ? '&fid='.$_GET['fid'] : (!empty($_GET['tid']) ? '&tid='.$_GET['tid'] : '')) : ''));
}
if(isset($_G['setting']['forumpicstyle'])) {
$_G['setting']['forumpicstyle'] = dunserialize($_G['setting']['forumpicstyle']);
empty($_G['setting']['forumpicstyle']['thumbwidth']) && $_G['setting']['forumpicstyle']['thumbwidth'] = 203;
empty($_G['setting']['forumpicstyle']['thumbheight']) && $_G['setting']['forumpicstyle']['thumbheight'] = 0;
} else {
$_G['setting']['forumpicstyle'] = array('thumbwidth' => 203, 'thumbheight' => 0);
}
if($fid) {
$fid = is_numeric($fid) ? intval($fid) : (!empty($_G['setting']['forumfids'][$fid]) ? $_G['setting']['forumfids'][$fid] : 0);
}

$modthreadkey = isset($_GET['modthreadkey']) && $_GET['modthreadkey'] == modauthkey($tid) ? $_GET['modthreadkey'] : '';
$_G['forum_auditstatuson'] = $modthreadkey ? true : false;

$metadescription = $hookscriptmessage = '';
$adminid = $_G['adminid'];

if(!empty($tid) || !empty($fid)) {

if(!empty ($tid)) {
$archiveid = !empty($_GET['archiveid']) ? intval($_GET['archiveid']) : null;
$_G['thread'] = get_thread_by_tid($tid, $archiveid);
$_G['thread']['allreplies'] = $_G['thread']['replies'] + $_G['thread']['comments'];
if(!$_G['forum_auditstatuson'] && !empty($_G['thread'])
&& !($_G['thread']['displayorder'] >= 0 || (in_array($_G['thread']['displayorder'], array(-4,-3,-2)) && $_G['uid'] && $_G['thread']['authorid'] == $_G['uid']))) {
$_G['thread'] = null;
}

$_G['forum_thread'] = & $_G['thread'];

if(empty($_G['thread'])) {
$fid = $tid = 0;
} else {
$fid = $_G['thread']['fid'];
$tid = $_G['thread']['tid'];
}
}

if($fid) {
$forum = C::t('forum_forum')->fetch_info_by_fid($fid);
}

if($forum) {
if($_G['uid']) {
if($_G['member']['accessmasks']) {
$query = C::t('forum_access')->fetch_all_by_fid_uid($fid, $_G['uid']);
$forum['allowview'] = $query['allowview'];
$forum['allowpost'] = $query['allowpost'];
$forum['allowreply'] = $query['allowreply'];
$forum['allowgetattach'] = $query['allowgetattach'];
$forum['allowgetimage'] = $query['allowgetimage'];
$forum['allowpostattach'] = $query['allowpostattach'];
$forum['allowpostimage'] = $query['allowpostimage'];
}
if($adminid == 3) {
$forum['ismoderator'] = C::t('forum_moderator')->fetch_uid_by_fid_uid($fid, $_G['uid']);
}
}
$forum['ismoderator'] = !empty($forum['ismoderator']) || $adminid == 1 || $adminid == 2 ? 1 : 0;
$fid = $forum['fid'];
$gorup_admingroupids = $_G['setting']['group_admingroupids'] ? dunserialize($_G['setting']['group_admingroupids']) : array('1' => '1');

if($forum['status'] == 3) {
if(!empty($forum['moderators'])) {
$forum['moderators'] = dunserialize($forum['moderators']);
} else {
require_once libfile('function/group');
$forum['moderators'] = update_groupmoderators($fid);
}
if($_G['uid'] && $_G['adminid'] != 1) {
$forum['ismoderator'] = !empty($forum['moderators'][$_G['uid']]) ? 1 : 0;
$_G['adminid'] = 0;
if($forum['ismoderator'] || $gorup_admingroupids[$_G['groupid']]) {
$_G['adminid'] = $_G['adminid'] ? $_G['adminid'] : 3;
if(!empty($gorup_admingroupids[$_G['groupid']])) {
$forum['ismoderator'] = 1;
$_G['adminid'] = 2;
}

$group_userperm = dunserialize($_G['setting']['group_userperm']);
if(is_array($group_userperm)) {
$_G['group'] = array_merge($_G['group'], $group_userperm);
$_G['group']['allowmovethread'] = $_G['group']['allowcopythread'] = $_G['group']['allowedittypethread']= 0;
}
}
}
}
foreach(array('threadtypes', 'threadsorts', 'creditspolicy', 'modrecommend') as $key) {
$forum[$key] = !empty($forum[$key]) ? dunserialize($forum[$key]) : array();
if(!is_array($forum[$key])) {
$forum[$key] = array();
}
}

if(!empty($forum['threadtypes']['types'])) {
safefilter($forum['threadtypes']['types']);
}
if(!empty($forum['threadtypes']['options']['name'])) {
safefilter($forum['threadtypes']['options']['name']);
}
if(!empty($forum['threadsorts']['types'])) {
safefilter($forum['threadsorts']['types']);
}

if($forum['status'] == 3) {
$_G['isgroupuser'] = 0;
$_G['basescript'] = 'group';
if($forum['level'] == 0) {
$levelinfo = C::t('forum_grouplevel')->fetch_by_credits($forum['commoncredits']);
$levelid = $levelinfo['levelid'];
$forum['level'] = $levelid;
C::t('forum_forum')->update_group_level($levelid, $fid);
}
if($forum['level'] != -1) {
loadcache('grouplevels');
$grouplevel = $_G['grouplevels'][$forum['level']];
if(!empty($grouplevel['icon'])) {
$valueparse = parse_url($grouplevel['icon']);
if(!isset($valueparse['host'])) {
$grouplevel['icon'] = $_G['setting']['attachurl'].'common/'.$grouplevel['icon'];
}
}
}

$group_postpolicy = $grouplevel['postpolicy'];
if(is_array($group_postpolicy)) {
$forum = array_merge($forum, $group_postpolicy);
}
$forum['allowfeed'] = $_G['setting']['group_allowfeed'];
if($_G['uid']) {
if(!empty($forum['moderators'][$_G['uid']])) {
$_G['isgroupuser'] = 1;
} else {
$groupuserinfo = C::t('forum_groupuser')->fetch_userinfo($_G['uid'], $fid);
$_G['isgroupuser'] = $groupuserinfo['level'];
if($_G['isgroupuser'] <= 0 && empty($forum['ismoderator'])) {
$_G['group']['allowrecommend'] = $_G['cache']['usergroup_'.$_G['groupid']]['allowrecommend'] = 0;
$_G['group']['allowcommentpost'] = $_G['cache']['usergroup_'.$_G['groupid']]['allowcommentpost'] = 0;
$_G['group']['allowcommentitem'] = $_G['cache']['usergroup_'.$_G['groupid']]['allowcommentitem'] = 0;
$_G['group']['raterange'] = $_G['cache']['usergroup_'.$_G['groupid']]['raterange'] = array();
$_G['group']['allowvote'] = $_G['cache']['usergroup_'.$_G['groupid']]['allowvote'] = 0;
} else {
$_G['isgroupuser'] = 1;
}
}
}
}
} else {
$fid = 0;
}
}

$_G['fid'] = $fid;
$_G['tid'] = $tid;
$_G['forum'] = &$forum;
$_G['current_grouplevel'] = &$grouplevel;

if(empty($_G['uid'])) {
$_G['group']['allowpostactivity'] = $_G['group']['allowpostpoll'] = $_G['group']['allowvote'] = $_G['group']['allowpostreward'] = $_G['group']['allowposttrade'] = $_G['group']['allowpostdebate'] = $_G['group']['allowpostrushreply'] = 0;
}
if(!empty($_G['forum']['widthauto'])) {
$_G['widthauto'] = $_G['forum']['widthauto'];
}
}
/**
* 根据主题ID获取主题信息
*
* @param int $tid 主题ID
* @param null $forcetableid 强制使用的表ID，如果为null，则自动判断
* @return array 返回主题信息数组，如果找不到则返回空数组
*/
function get_thread_by_tid($tid, $forcetableid = null) {
global $_G;

$ret = array();
// 检查tid是否为数字
if(!is_numeric($tid)) {
 return $ret;
}
// 加载主题表ID的缓存
loadcache('threadtableids');
$threadtableids = array(0);
// 处理表ID的选择
if(!empty($_G['cache']['threadtableids'])) {
 if($forcetableid === null || ($forcetableid > 0 && !in_array($forcetableid, $_G['cache']['threadtableids']))) {
 $threadtableids = array_merge($threadtableids, $_G['cache']['threadtableids']);
 } else {
 $threadtableids = array(intval($forcetableid));
 }
}
// 去重并遍历每个表ID查询主题信息
$threadtableids = array_unique($threadtableids);
foreach($threadtableids as $tableid) {
 $tableid = $tableid > 0 ? $tableid : 0;
 $ret = C::t('forum_thread')->fetch_thread($tid, $tableid);
 // 如果找到主题信息，处理并返回
 if($ret) {
 $ret['threadtable'] = C::t('forum_thread')->get_table_name($tableid);
 $ret['threadtableid'] = $tableid;
 $ret['posttable'] = 'forum_post'.($ret['posttableid'] ? '_'.$ret['posttableid'] : '');
 break;
 }
}

// 如果未找到主题信息，返回空数组，或者根据设置优化视图
if(!is_array($ret)) {
 $ret = array();
} elseif(getglobal('setting/optimizeviews')) {
 if(($row = C::t('forum_threadaddviews')->fetch($tid))) {
 $ret['addviews'] = intval($row['addviews']);
 $ret['views'] += $ret['addviews'];
 }
}

return $ret;
}

/**
* 根据帖子ID获取帖子信息
*
* @param int $pid 帖子ID
* @param string $fields 需要查询的字段，默认为'*'
* @param string $addcondiction 添加的查询条件，默认为空
* @param null $forcetable 强制使用的表名或表ID，如果为null，则自动判断
* @return array 返回帖子信息数组，如果找不到则返回空数组
*/
function get_post_by_pid($pid, $fields = '*', $addcondiction = '', $forcetable = null) {
global $_G;

$ret = array();
// 检查pid是否为数字
if(!is_numeric($pid)) {
 return $ret;
}

// 加载帖子表信息缓存
loadcache('posttable_info');

$posttableids = array(0);
// 处理表ID的选择
if($_G['cache']['posttable_info']) {
 if(isset($forcetable)) {
 if(is_numeric($forcetable) && array_key_exists($forcetable, $_G['cache']['posttable_info'])) {
 $posttableids[] = $forcetable;
 } elseif(substr($forcetable, 0, 10) == 'forum_post') {
 $posttableids[] = $forcetable;
 }
 } else {
 $posttableids = array_keys($_G['cache']['posttable_info']);
 }
}

// 遍历每个表ID查询帖子信息
foreach ($posttableids as $id) {
 $table = empty($id) ? 'forum_post' : (is_numeric($id) ? 'forum_post_'.$id : $id);
 $ret = C::t('forum_post')->fetch_by_pid_condition($id, $pid, $addcondiction, $fields);
 // 如果找到帖子信息，处理并返回
 if($ret) {
 $ret['posttable'] = $table;
 break;
 }
}

// 如果未找到帖子信息，返回空数组
if(!is_array($ret)) {
 $ret = array();
}

return $ret;
}

/**
* 根据主题ID和帖子ID获取帖子信息
*
* @param int $tid 主题ID
* @param int $pid 帖子ID
* @return array 返回帖子信息数组
*/
function get_post_by_tid_pid($tid, $pid) {
static $postlist = array();
if(empty($postlist[$pid])) {
 // 从数据库获取帖子信息
 $postlist[$pid] = C::t('forum_post')->fetch_post('tid:'.$tid, $pid, false);
 if($postlist[$pid] && $postlist[$pid]['tid'] == $tid) {
 // 获取帖子作者信息并更新到帖子信息中
 $user = getuserbyuid($postlist[$pid]['authorid']);
 $postlist[$pid]['adminid'] = $user['adminid'];
 } else {
 $postlist[$pid] = array();
 }
}
return $postlist[$pid];
}

/**
* 设置RSS认证信息
*/
function set_rssauth() {
global $_G;
// 检查是否开启RSS功能并且用户已登录
if($_G['setting']['rssstatus'] && $_G['uid']) {
 $auth = authcode($_G['uid']."\t".($_G['fid'] ? $_G['fid'] : '').
 "\t".substr(md5($_G['member']['password']), 0, 8), 'ENCODE', md5($_G['config']['security']['authkey']));
} else {
 $auth = '0';
}
$_G['rssauth'] = rawurlencode($auth);
}

/**
* 检查论坛板块是否允许RSS访问
*
* @param array $forum 包含板块信息的数组
* @return bool 返回板块是否允许RSS访问
*/
function rssforumperm($forum) {
$is_allowed = $forum['type'] != 'group' && (!$forum['viewperm'] || ($forum['viewperm'] && forumperm($forum['viewperm'], 7)));
return $is_allowed;
}
/**
* 上传图标或横幅
*
* @param array &$data 上传数据，包含状态、扩展ID等
* @param array $file 上传的文件信息
* @param string $type 文件类型（例如：icon或banner）
* @return string|boolean 上传成功返回文件路径，失败返回空字符串或false
*/
function upload_icon_banner(&$data, $file, $type) {
global $_G;
// 设置默认的扩展ID为论坛ID
$data['extid'] = empty($data['extid']) ? $data['fid'] : $data['extid'];
if(empty($data['extid'])) return '';

// 检查群组图片大小限制
if($data['status'] == 3 && $_G['setting']['group_imgsizelimit']) {
 $file['size'] > ($_G['setting']['group_imgsizelimit'] * 1024) && showmessage('file_size_overflow', '', array('size' => $_G['setting']['group_imgsizelimit'] * 1024));
}
$upload = new discuz_upload();
$uploadtype = $data['status'] == 3 ? 'group' : 'common'; // 根据状态确定上传类型

if(!$upload->init($file, $uploadtype, $data['extid'], $type)) {
 return false;
}

if(!$upload->save()) {
 if(!defined('IN_ADMINCP')) {
 showmessage($upload->errormessage());
 } else {
 cpmsg($upload->errormessage(), '', 'error');
 }
}
// 如果是群组图标，生成缩略图
if($data['status'] == 3 && $type == 'icon') {
 require_once libfile('class/image');
 $img = new image;
 $img->Thumb($upload->attach['target'], './'.$uploadtype.'/'.$upload->attach['attachment'], 200, 200, 'fixwr');
}
return $upload->attach['attachment'];
}

/**
* 生成多页链接
*
* @param int $total 总数量
* @param int $perpage 每页数量
* @param int $page 当前页码
* @param string $link 链接基础部分
* @return string 生成的分页链接
*/
function arch_multi($total, $perpage, $page, $link) {
$pages = @ceil($total / $perpage) + 1;
$pagelink = '';
if($pages > 1) {
 $pagelink .= lang('forum/archiver', 'page') . ": \n";
 $pagestart = $page - 10 < 1 ? 1 : $page - 10;
 $pageend = $page + 10 >= $pages ? $pages : $page + 10;
 for($i = $pagestart; $i < $pageend; $i++) {
 $pagelink .= ($i == $page ? "[$i]" : "<a href=\"$link&page=$i\">$i</a>")." \n";
 }
}
return $pagelink;
}

/**
* 加载存档文件
*
* @param string $path 文件路径
* @return string 完整的文件路径
*/
function loadarchiver($path) {
global $_G;
if(!$_G['setting']['archiver']) {
 require_once DISCUZ_ROOT . "./source/archiver/common/header.php";
 echo '<div id="content">'.lang('message', 'forum_archiver_disabled').'</div>';
 require_once DISCUZ_ROOT . "./source/archiver/common/footer.php";
 exit;
}
$filename = $path . '.php';
return DISCUZ_ROOT . "./source/archiver/$filename";
}

/**
* 更新帖子参与度
*
* @param int $tid 帖子ID
* @param boolean $getsetarr 是否返回更新设置数组
* @return array|void 返回更新设置数组或者无返回
*/
function update_threadpartake($tid, $getsetarr = false) {
global $_G;
$setarr = array();
if($_G['uid'] && $tid) {
 if($_G['setting']['heatthread']['period']) {
 $partaked = C::t('forum_threadpartake')->fetch_threadpartake($tid, $_G['uid']);
 $partaked = $partaked['uid'];
 if(!$partaked) {
 C::t('forum_threadpartake')->insert(array('tid' => $tid, 'uid' => $_G['uid'], 'dateline' => TIMESTAMP));
 $setarr = C::t('forum_thread')->increase($tid, array('heats' => 1), false, 0, $getsetarr);
 }
 } else {
 $setarr = C::t('forum_thread')->increase($tid, array('heats' => 1), false, 0, $getsetarr);
 }
}
if($getsetarr) {
 return $setarr;
}
}

/**
* 获取帖子封面路径
*
* @param int $tid 帖子ID
* @param int $cover 指定封面版本
* @param int $getfilename 是否只返回文件名
* @return string 封面路径或文件名
*/
function getthreadcover($tid, $cover = 0, $getfilename = 0) {
global $_G;
if(empty($tid)) {
 return '';
}
$coverpath = '';
$covername = 'threadcover/'.substr(md5($tid), 0, 2).'/'.substr(md5($tid), 2, 2).'/'.$tid.'.jpg';
if($getfilename) {
 return $covername;
}
if($cover) {
 $coverpath = ($cover < 0 ? $_G['setting']['ftp']['attachurl'] : $_G['setting']['attachurl']).'forum/'.$covername;
}
return $coverpath;
}

/**
* 转换未使用的附件关联信息
*
* @param int $aid 附件ID
* @param int $tid 主题ID
* @param int $pid 帖子ID
* @return void
*/
function convertunusedattach($aid, $tid, $pid) {
if(!$aid) {
 return;
}
global $_G;
$attach = C::t('forum_attachment_n')->fetch_by_aid_uid(127, $aid, $_G['uid']);
if(!$attach) {
 return;
}
$attach = daddslashes($attach);
$attach['tid'] = $tid;
$attach['pid'] = $pid;
C::t('forum_attachment_n')->insert_attachment('tid:'.$tid, $attach);
C::t('forum_attachment')->update($attach['aid'], array('tid' => $tid, 'pid' => $pid, 'tableid' => getattachtableid($tid)));
C::t('forum_attachment_unused')->delete($attach['aid']);
}

/**
* 更新附件关联的帖子ID
*
* @param string $idtype 关联类型
* @param array $ids 关联ID列表
* @param int $oldtid 旧帖子ID
* @param int $newtid 新帖子ID
* @return void
*/
function updateattachtid($idtype, $ids, $oldtid, $newtid) {
foreach(C::t('forum_attachment_n')->fetch_all_by_id('tid:'.$oldtid, $idtype, $ids) as $attach) {
 $attach['tid'] = $newtid;
 C::t('forum_attachment_n')->insert_attachment('tid:'.$newtid, $attach);
}
C::t('forum_attachment_n')->delete_by_id('tid:'.$oldtid, $idtype, $ids);
C::t('forum_attachment')->update_by_id($idtype, $ids, $newtid);
}
/**
* 更新帖子信息
*
* @param array $data 包含帖子数据的数组
* @param string $condition 更新条件
* @param bool $unbuffered 是否使用缓冲查询，默认为false
* @param bool $posttableid 帖子表ID，默认为false
* @return bool 操作结果，通常为false
*/
function updatepost($data, $condition, $unbuffered = false, $posttableid = false) {
return false;
}

/**
* 插入帖子
*
* @param array $data 包含帖子数据的数组
* @return int 插入的帖子ID，失败则返回false
*/
function insertpost($data) {
// 如果$data中包含tid，尝试获取帖子信息并确定帖子所属的表ID
if(isset($data['tid'])) {
 $thread = C::t('forum_thread')->fetch_thread($data['tid']);
 $tableid = $thread['posttableid'];
 // 如果帖子回复数为0且存在沙发，则删除沙发帖
 if($thread['replies'] <= 0 && C::t('forum_sofa')->fetch($thread['tid'])) {
 C::t('forum_sofa')->delete($thread['tid']);
 }
} else {
 // 如果没有提供tid，则默认tid和tableid为0
 $tableid = $data['tid'] = 0;
}
// 插入帖子到forum_post_tableid表并获取插入的PID
$pid = C::t('forum_post_tableid')->insert(array('pid' => null), true);

// 合并数据并插入到forum_post表
$data = array_merge($data, array('pid' => $pid));
C::t('forum_post')->insert_post($tableid, $data);
// 如果PID是1024的倍数，删除forum_post_tableid中PID小于等于该值的记录
if($pid % 1024 == 0) {
 C::t('forum_post_tableid')->delete_by_lesspid($pid);
}
// 保存最大帖子ID缓存
savecache('max_post_id', $pid);
return $pid;
}

/**
* 根据字符串内容判断帖子是否需要审核
*
* @param string $string 帖子的主题和内容
* @return array 包含帖子是否需要审核的信息
*/
function threadmodstatus($string) {
global $_G;
// 检查是否在指定时间范围内需要审核
$postmodperiods = periodscheck('postmodperiods', 0);
if($postmodperiods) {
 $modnewthreads = $modnewreplies = 1;
} else {
 // 根据用户组和论坛设置判断帖子是否需要审核
 $censormod = censormod($string);
 $modnewthreads = (!$_G['group']['allowdirectpost'] || $_G['group']['allowdirectpost'] == 1) && $_G['forum']['modnewposts'] || $censormod ? 1 : 0;
 $modnewreplies = (!$_G['group']['allowdirectpost'] || $_G['group']['allowdirectpost'] == 2) && $_G['forum']['modnewposts'] == 2 || $censormod ? 1 : 0;

 // 考虑论坛状态对审核需求的影响
 if($_G['forum']['status'] == 3) {
 $modnewthreads = !$_G['group']['allowgroupdirectpost'] || $_G['group']['allowgroupdirectpost'] == 1 || $censormod ? 1 : 0;
 $modnewreplies = !$_G['group']['allowgroupdirectpost'] || $_G['group']['allowgroupdirectpost'] == 2 || $censormod ? 1 : 0;
 }
}

// 处理允许发布URL的权限
$_G['group']['allowposturl'] = $_G['forum']['status'] != 3 ? $_G['group']['allowposturl'] : $_G['group']['allowgroupposturl'];
if($_G['group']['allowposturl'] == 1) {
 if(!$postmodperiods) {
 $censormod = censormod($string);
 }
 if($censormod) {
 $modnewthreads = $modnewreplies = 1;
 }
}
return array($modnewthreads, $modnewreplies);
}

/**
* 保存主题发布信息
*
* @param int $tid 主题ID
* @param bool $passapproval 是否通过审核，默认为false
* @return int 操作结果，1为成功，0为主题不存在，-1为需审核，-2为回复需审核
*/
function threadpubsave($tid, $passapproval = false) {
global $_G;
// 执行插件钩子
if($_G['setting']['plugins']['func']['threadpubsave']) {
 $hookparam = func_get_args();
 hookscript('threadpubsave', 'global', 'funcs', array('param' => $hookparam, 'step' => 'check'), 'threadpubsave');
}
// 获取主题信息
$thread = C::t('forum_thread')->fetch_by_tid_displayorder($tid, -4, '=', !$passapproval ? $_G['uid'] : null);
if(!$thread) {
 return 0;
}
// 获取主题帖子信息
$threadpost = C::t('forum_post')->fetch_threadpost_by_tid_invisible($tid);
$thread['message'] = $threadpost['message'];

// 初始化变量
$modworksql = 0;
$displayorder = 0;
$dateline = $_G['timestamp'];
$moderatepids = $saveposts = array();
$return = 1;

// 判断帖子是否需要审核
list($modnewthreads) = threadmodstatus($thread['subject']."\t".$thread['message']);
if($modnewthreads && $passapproval === false) {
 // 如果需要审核，则更新审核信息并通知管理员
 updatemoderate('tid', $tid);
 manage_addnotify('verifythread');
 $displayorder = -2;
 $modworksql = 1;
 $return = -1;
 C::t('forum_post')->update_by_tid('tid:'.$tid, $tid, array('dateline' => $dateline), false, false, 1);
} else {
 // 如果不需要审核，则更新帖子时间
 C::t('forum_post')->update_by_tid('tid:'.$tid, $tid, array('dateline' => $dateline, 'invisible' => '0'), false, false, 1);
}

// 更新主题信息
C::t('forum_thread')->update($tid, array('displayorder'=>$displayorder, 'dateline'=>$_G['timestamp'], 'lastpost'=>$_G['timestamp']));
$posts = $thread['replies'] + 1;
// 如果有回复，则处理每个回复
if($thread['replies']) {
 $saveposts = C::t('forum_post')->fetch_all_by_tid('tid:'.$tid, $tid, true, '', 0, 0, 0);
 foreach($saveposts as $post) {
 $dateline++;
 $invisible = 0;
 list(, $modnewreplies) = threadmodstatus($post['subject']."\t".$post['message']);
 if($modnewreplies) {
 $moderatepids[] = $post['pid'];
 $verifypost = true;
 $invisible = -2;
 $modworksql = 1;
 $return = -2;
 }
 // 更新回复信息
 C::t('forum_post')->update_post('tid:'.$tid, $post['pid'], array('dateline' => $dateline, 'invisible' => $invisible));
 // 更新用户积分
 updatepostcredits('+', $thread['authorid'], 'reply', $thread['fid']);
 }
}
// 如果有需要审核的帖子，更新审核信息并通知管理员
if($moderatepids) {
 updatemoderate('pid', $moderatepids);
 manage_addnotify('verifypost');
}
// 更新用户积分
updatepostcredits('+', $thread['authorid'], 'post', $thread['fid']);
// 更新附件积分
$attachcount = C::t('forum_attachment_n')->count_by_id('tid:'.$thread['tid'], 'tid', $thread['tid']);
updatecreditbyaction('postattach', $thread['authorid'], array(), '', $attachcount, 1, $thread['fid']);
// 如果论坛为分类讨论区，则更新用户在该分类下的帖子数
if($_G['forum']['status'] == 3) {
 C::t('forum_groupuser')->update_counter_for_user($thread['authorid'], $thread['fid'], 1);
}

// 更新论坛和分类讨论区的最新帖子信息
$subject = str_replace("\t", ' ', $thread['subject']);
$lastpost = $thread['tid']."\t".$subject."\t".$thread['lastpost']."\t".$thread['lastposter'];
C::t('forum_forum')->update($_G['fid'], array('lastpost' => $lastpost));
C::t('forum_forum')->update_forum_counter($thread['fid'], 1, $posts, $posts, $modworksql);
// 更新父版块的最新帖子信息
if($_G['forum']['type'] == 'sub') {
 C::t('forum_forum')->update($_G['forum']['fup'], array('lastpost' => $lastpost));
}
// 执行插件钩子
if($_G['setting']['plugins']['func']['threadpubsave']) {
 hookscript('threadpubsave', 'global', 'funcs', array('param' => $hookparam, 'step' => 'save', 'posts' => $saveposts), 'threadpubsave');
}
return $return;
}
/**
* 获取相关收藏集
*
* @param int $tid 主题ID
* @param bool $all 是否获取全部相关收藏集，默认为false，即获取设置数量内的收藏集
* @param int &$num 返回相关收藏集的数量
* @param int &$more 如果收藏集数量超过设置的最大显示数量，$more设为1，否则设为0
* @return array 返回收藏集信息数组，如果无相关收藏集则返回null
*/
function getrelatecollection($tid, $all = false, &$num = null, &$more = null) {
global $_G;

$maxdisplay = $_G['setting']['collectionnum']; // 获取设置的收藏集显示数量
if(!$maxdisplay) return; // 如果设置为不显示，则直接返回

$tidrelate = C::t('forum_collectionrelated')->fetch($tid); // 获取指定主题的收藏集信息
$ctids = explode("\t", $tidrelate['collection'], -1); // 解析收藏集ID字符串为数组
$num = count($ctids); // 计算收藏集数量

if(!$ctids || !$num) {
 $more = $num = 0;
 return null;
}
if($all !== true && $num > $maxdisplay) {
 $more = 1; // 如果未设置获取全部且收藏集数量超过最大显示数量，则设置$more为1
} else {
 $maxdisplay = 0; // 否则设置$maxdisplay为0，表示获取全部
}
return C::t('forum_collection')->fetch_all($ctids, 'follownum', 'DESC', 0, $maxdisplay, '', $tid); // 获取收藏集信息
}

/**
* 设置@列表的Cookie
*
* @param array $uids 要设置的UID列表
*/
function set_atlist_cookie($uids) {
global $_G;
$atlist = $tmp = array();
$num = 0;
$maxlist = 10; // 设置@列表的最大数量
if(empty($uids)) {
 return;
}
$newnum = count($uids); // 新的@列表数量
if($newnum >= $maxlist) {
 $uids = array_slice($uids, 0, $maxlist); // 如果超过最大数量，则截取前$maxlist个UID
 dsetcookie('atlist', implode(',', $uids), 86400 * 360); // 设置Cookie
 return;
}
if($_G['cookie']['atlist']) {
 $atlist = explode(',', $_G['cookie']['atlist']);
 foreach($atlist as $key => $val) {
 if(!in_array($val, $uids)) {
 $num++;
 if($num == ($maxlist - $newnum)) {
 break;
 }
 $tmp[$key] = $val;
 }
 }
}
dsetcookie('atlist', implode(',', $uids).($tmp ? ','.implode(',', $tmp) : ''), 86400 * 360); // 更新或设置Cookie
}

/**
* 检查HTTP_REFERER是否来自指定搜索引擎
*
* @return bool 返回true表示HTTP_REFERER来自指定搜索引擎，否则返回false
*/
function viewthread_is_search_referer() {
$regex = "((http|https)\:\/\/)?";
$regex .= "(*.)?(toutiao.com|m.sm.cn|www.so.com|sogou.com|bing.com|baidu.com|google.com|google.cn|google.com.hk)(.{2,3})?\/";
if(preg_match("/^$regex/", $_SERVER['HTTP_REFERER'])) {
 return true;
}
return false;
}

/**
* 生成字符串话题的图片表示
*
* @param string $value 要生成图片的字符串
* @param string $key 生成图片的标识关键字，默认与$value相同
* @param bool $force 是否强制重新生成图片，默认为false
* @param int $rlength 如果指定，将对字符串进行截断，使其长度不超过此参数
* @return string 返回图片的URL地址
*/
function stringtopic($value, $key = '', $force = false, $rlength = 0) {
if($key === '') {
 $key = $value; // 如果未指定$key，则使用$value作为$key
}
// 计算图片存储路径和URL
$basedir = !getglobal('setting/attachdir') ? './data/attachment' : getglobal('setting/attachdir');
$url = !getglobal('setting/attachurl') ? './data/attachment/' : getglobal('setting/attachurl');
$subdir1 = substr(md5($key), 0, 2);
$subdir2 = substr(md5($key), 2, 2);
$target = 'temp/'.$subdir1.'/'.$subdir2.'/';
$targetname = substr(md5($key), 8, 16).'.png';
discuz_upload::check_dir_exists('temp', $subdir1, $subdir2); // 检查目录是否存在，不存在则创建
// 检查是否需要重新生成图片
if(!$force && file_exists($basedir.'/'.$target.$targetname)) {
 return $url.$target.$targetname; // 如果存在则直接返回图片URL
}
$value = str_replace("\n", '', $value); // 去除字符串中的换行符
// 默认字体设置
$fontfile = $fontname = '';
$ttfenabled = false;
$size = 10;
$w = 130;
$rowh = 25;
// 处理字符串，按换行符分割
$value = explode("\r", $value);
// 如果指定了最大长度，则对字符串进行截断
if($rlength) {
 $temp = array();
 foreach($value as $str) {
 $strlen = dstrlen($str);
 if($strlen > $rlength) {
 for($i = 0; $i < $strlen; $i++) {
 $sub = cutstr($str, $rlength, '');
 $temp[] = $sub;
 $str = substr($str, strlen($sub));
 $strlen = $strlen - $rlength;
 }
 } else {
 $temp[] = $str;
 }
 }
 $value = $temp;
 unset($temp);
}
// 使用TrueType字体绘制文本
if(function_exists('imagettftext')) {
 $fontroot = DISCUZ_ROOT.'./static/image/seccode/font/ch/';
 $dirs = opendir($fontroot);
 while($entry = readdir($dirs)) {
 if($entry != '.' && $entry != '..' && in_array(strtolower(fileext($entry)), array('ttf', 'ttc'))) {
 $fontname = $entry;
 break;
 }
 }
 if(!empty($fontname)) {
 $fontfile = DISCUZ_ROOT.'./static/image/seccode/font/ch/'.$fontname;
 }
 if($fontfile) {
 if(strtoupper(CHARSET) != 'UTF-8') {
 include DISCUZ_ROOT.'./source/class/class_chinese.php';
 $cvt = new Chinese(CHARSET, 'utf8');
 $value = $cvt->Convert(implode("\r", $value));
 $value = explode("\r", $value);
 }
 $ttfenabled = true;
 }
}

// 计算文本的宽度和高度
foreach($value as $str) {
 if($ttfenabled) {
 $box = imagettfbbox($size, 0, $fontfile, $str);
 $height = max($box, $box) - min($box, $box);
 $len = (max($box, $box) - min($box, $box));
 $rowh = max(array($height, $rowh));
 } else {
 $len = strlen($str) * 12;
 }
 $w = max(array($len, $w));
}
$h = $rowh * count($value) + count($value) * 2;
// 创建图片并绘制文本
$im = @imagecreate($w, $h);
$background_color = imagecolorallocate($im, 255, 255, 255); // 设置背景颜色
$text_color = imagecolorallocate($im, 60, 60, 60); // 设置文本颜色
$h = $ttfenabled ? $rowh : 4;
foreach($value as $str) {
 if($ttfenabled) {
 imagettftext($im, $size, 0, 0, $h, $text_color, $fontfile, $str);
 $h += 2;
 } else {
 imagestring($im, $size, 0, $h, $str, $text_color);
 }
 $h += $rowh;
}
imagepng($im, $basedir.'/'.$target.$targetname); // 保存图片
imagedestroy($im);
return $url.$target.$targetname; // 返回图片URL
}
/**
* 获取回复背景样式
*
* 根据用户设置或全局设置, 获取并返回回复内容的背景图片样式。
*
* @param string $replybg 用户自定义的回复背景图片名称。
* @return string 返回背景图片的样式字符串，如果没有设置，则返回空字符串。
*/
function getreplybg($replybg = '') {
global $_G;
$style = '';
// 检查是否允许自定义回复背景
if(getglobal('setting/allowreplybg')) {
// 处理用户自定义回复背景
if($replybg) {
$bgurl = $replybg;
// 检查文件是否存在，确保附件URL正确
if(file_exists($_G['setting']['attachurl'].'common/'.$replybg)) {
$bgurl = $_G['setting']['attachurl'].'common/'.$replybg;
}
// 处理全局默认回复背景
} elseif($_G['setting']['globalreplybg']) {
$bgurl = $_G['setting']['globalreplybg'];
// 检查文件是否存在，确保附件URL正确
if(file_exists($_G['setting']['attachurl'].'common/'.$_G['setting']['globalreplybg'])) {
$bgurl = $_G['setting']['attachurl'].'common/'.$_G['setting']['globalreplybg'];
}
}
// 如果设置了背景图片，则生成样式字符串
if($bgurl) {
$style = ' style="background-image: url('.$bgurl.');"';
}
}
return $style;
}

/**
* 安全过滤数据
*
* 对数组或字符串进行安全过滤，替换BBCODE为HTML标签，并移除潜在的XSS攻击向量。
*
* @param &$data 需要进行安全过滤的数据，可以是数组或字符串。
*/
function safefilter(&$data) {
if(is_array($data)) {
// 递归处理数组中的每个元素
foreach($data as $k => $v) {
safefilter($data[$k]);
}
} else {
// 替换和清理特定的BBCODE以及HTML标签，避免XSS攻击
$data = str_replace(array(
'', '', '', '', '', '', '', '', '',
), array(
'', '', '', '<strike>', '</strike>', '', '', '', ''
), preg_replace(array(
"/\+?)\]/i",
"/\+?\))\]/i",
), array(
"",
"",
), strip_tags($data)));
}
}

?>

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Discuz x3.5 核心文件 function/function_forum.php 函数注释