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[内置扩展] Discuz x3.5 核心文件 function/function_forum.php 函数注释

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发表于 2024-6-23 13:20:09 | 显示全部楼层 |阅读模式

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[PHP] 纯文本查看 复制代码
<?php

/**
 *      [Discuz!] (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'][$medal]['image'].'" style="vertical-align:middle;" />&nbsp;'.$_G['cache']['medals'][$medal]['name'].'&nbsp; ';
                }
            }
            showmessage('forum_permforum_nomedal', NULL, array('forum_permforum_nomedal' => $_G['forum_formulamessage']), array('login' => 1));
        }
    }
    $formulatext = $formula[0];
    $formula = trim($formula[1]);
    // 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[1] 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("/\{([0-9a-fA-F\.\:\/]+?)\}/", "'\\1'", $formula);
                    $formula = preg_replace('/(\$memberformula\[\'(regip|lastip)\'\])\s*=+\s*\'([0-9a-fA-F\.\:\/]+?)\'/', "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[1])) {
                $memberformula['regday'] = intval((TIMESTAMP - $memberformula['regdate']) / 86400);
            }
            if(in_array('regdate', $a[1])) {
                $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, $s) ? '<br />&nbsp;&nbsp;&nbsp;'.$replace[$i].': '.(@eval('return intval(getuserprofile(\''.$s.'\'));')) : '';
                } elseif(in_array($s, array('regdate', 'regip', 'regday'))) {
                    $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '<br />&nbsp;&nbsp;&nbsp;'.$replace[$i].': '.(@eval('return $memberformula[\''.$s.'\'];')) : '';
                }
                $i++;
            }
            $search = array_merge($search, array('and', 'or', '>=', '<=', '=='));
            $replace = array_merge($replace, array('&nbsp;&nbsp;<b>'.$language['formulaperm_and'].'</b>&nbsp;&nbsp;', '&nbsp;&nbsp;<b>'.$language['formulaperm_or'].'</b>&nbsp;&nbsp;', '&ge;', '&le;', '='));
            $_G['forum_formulamessage'] = str_replace($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[0];
    $formula = $formula[1];
    if(!$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[1] 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("/\{([0-9a-fA-F\.\:\/]+?)\}/", "'\\1'", $formula);
                    $formula = preg_replace('/(\$memberformula\[\'(regip|lastip)\'\])\s*=+\s*\'([0-9a-fA-F\.\:\/]+?)\'/', "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[1])) {
                $memberformula['regday'] = intval((TIMESTAMP - $memberformula['regdate']) / 86400);
            }
            if(in_array('regdate', $a[1])) {
                $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, $s) ? '<br />&nbsp;&nbsp;&nbsp;'.$replace[$i].': '.(@eval('return intval(getuserprofile(\''.$s.'\'));')) : '';
                } elseif(in_array($s, array('regdate', 'regip'))) {
                    $_G['forum_usermsg'] .= strexists($formulatext, $s) ? '<br />&nbsp;&nbsp;&nbsp;'.$replace[$i].': '.(@eval('return $memberformula[\''.$s.'\'];')) : '';
                }
                $i++;
            }
            $search = array_merge($search, array('and', 'or', '>=', '<=', '=='));
            $replace = array_merge($replace, array('&nbsp;&nbsp;<b>'.$language['formulaperm_and'].'</b>&nbsp;&nbsp;', '&nbsp;&nbsp;<b>'.$language['formulaperm_or'].'</b>&nbsp;&nbsp;', '&ge;', '&le;', '='));
            $permmessage = str_replace($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[1].'-'.sprintf('%02d', $matches[2]).'-'.sprintf('%02d', $matches[3]).'\'';
}

/**
 * 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']) {
        $html = '<select name="typeid" id="typeid"><option value="0">&nbsp;</option>';
        foreach($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[0], $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']][0];
    $gids = $forumnoperms[$fid][$type][$_G['groupid']][1];
    $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[0]['allowview'];
					$forum['allowpost'] = $query[0]['allowpost'];
					$forum['allowreply'] = $query[0]['allowreply'];
					$forum['allowgetattach'] = $query[0]['allowgetattach'];
					$forum['allowgetimage'] = $query[0]['allowgetimage'];
					$forum['allowpostattach'] = $query[0]['allowpostattach'];
					$forum['allowpostimage'] = $query[0]['allowpostimage'];
				}
				if($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 == $page ? "<strong>[$i]</strong>" : "<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'][HOOKTYPE]['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'][HOOKTYPE]['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)\:\/\/)?";
    $regex .= "([a-z]*.)?(toutiao.com|m.sm.cn|[url]www.so.com[/url]|sogou.com|bing.com|baidu.com|google.com|google.cn|google.com.hk)(.[a-z]{2,3})?\/";
    if(preg_match("/^$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[1], $box[3]) - min($box[5], $box[7]);
            $len = (max($box[2], $box[4]) - min($box[0], $box[6]));
            $rowh = max(array($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(
			'[/color]', '[b]', '[/b]', '[s]', '[/s]', '[i]', '[/i]', '[u]', '[/u]',
			), array(
			'</font>', '<b>', '</b>', '<strike>', '</strike>', '<i>', '</i>', '<u>', '</u>'
			), preg_replace(array(
			"/\[color=([#\w]+?)\]/i",
			"/\[color=((rgb|rgba)\([\d\s\.,]+?\))\]/i",
			), array(
			"<font color=\"\\1\">",
			"<font style=\"color:\\1\">",
			), strip_tags($data)));
	}
}

?>
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