Discuz! X2 核心类源码分析-discuz_core
<?php
/**
* [Discuz!] (C)2001-2099 Comsenz Inc.
* This is NOT a freeware, use is subject to license terms
*
* $Id: class_core.php 21271 2011-03-22 02:44:58Z congyushuai $
*/
define('IN_DISCUZ', true);
error_reporting(0);
class discuz_core {
var $db = null;
var $mem = null;
var $session = null;
var $config = array();
var $var = array();
var $cachelist = array();
var $init_setting = true;
var $init_user = true;
var $init_session = true;
var $init_cron = true;
var $init_misc = true;
var $init_memory = true;
var $init_mobile = true;
var $initated = false; //初始化工作未完成标志
var $superglobal = array(
'GLOBALS' => 1,
'_GET' => 1,
'_POST' => 1,
'_REQUEST' => 1,
'_COOKIE' => 1,
'_SERVER' => 1,
'_ENV' => 1,
'_FILES' => 1,
);
function &instance() {
static $object;
if(empty($object)) {
$object = new discuz_core();
}
return $object;
}
function discuz_core() {
$this->_init_env(); //初始化环境变量
$this->_init_config(); //初始化配置变量
$this->_init_input(); //初始化输入
$this->_init_output(); //初始化输出
}
function init() {
if(!$this->initated) {
$this->_init_db(); //初始化数据库
$this->_init_memory(); //初始化memcache
$this->_init_user(); //用户信息初始化
$this->_init_session(); //session操作初始化
$this->_init_setting(); //系统设置初始化
$this->_init_mobile(); //手机功能初始化
$this->_init_cron(); //计划任务初始化
$this->_init_misc(); //其他功能初始化
}
$this->initated = true; //设置完成标志
}
function _init_env() { //环境变量初始化方法
error_reporting(E_ERROR); //定义错误报告等级
if(phpversion() < '5.3.0') {
set_magic_quotes_runtime(0); //设置set_magic_quotes_runtime
}
define('DISCUZ_ROOT', substr(dirname(__FILE__), 0, -12)); //定义根目录常量
define('MAGIC_QUOTES_GPC', function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc()); //定义MAGIC_QUOTES_GPC
define('ICONV_ENABLE', function_exists('iconv')); //定义转码函数常量，如果 iconv函数支持，则为TRUE
define('MB_ENABLE', function_exists('mb_convert_encoding')); //转码函数是否支持
define('EXT_OBGZIP', function_exists('ob_gzhandler')); //缓存输出句柄函数
define('TIMESTAMP', time()); //定义当前时间戳常量
$this->timezone_set();
if(!defined('DISCUZ_CORE_FUNCTION') && !@include(DISCUZ_ROOT.'./source/function/function_core.php')) {
exit('function_core.php is missing'); //如果系统核心函数库文件未include,则include,如果核心函数库文件缺失，则退出，因为function_core.php是系统本身的函数库，必须加载
}
if(function_exists('ini_get')) {
$memorylimit = @ini_get('memory_limit');
if($memorylimit && return_bytes($memorylimit) < 33554432 && function_exists('ini_set')) {
ini_set('memory_limit', '128m');
}
}
//以上6行代码的作用是设置内存使用限制，如果小于32M,则增加为128M，因为memory_limit小于32M，可能会不够用，毕竟X系统比较大，可能内存会使用的多点，如果不支持ini_set函数，就得去php.ini中修改了。
define('IS_ROBOT', checkrobot()); //检测机器人
foreach ($GLOBALS as $key => $value) {
if (!isset($this->superglobal[$key])) {
$GLOBALS[$key] = null; unset($GLOBALS[$key]);
}
}
//以上几行的意思是，注销所有的超级变量。
global $_G; //$_G大数组是Discuz中自定义的超级变量
$_G = array(
'uid' => 0, //uid
'username' => '', //用户名
'adminid' => 0, //adminid标识
'groupid' => 1, //用户组ID
'sid' => '', // sessionID
'formhash' => '', //表单验证认证
'timestamp' => TIMESTAMP, //时间戳
'starttime' => dmicrotime(), //开始时间
'clientip' => $this->_get_client_ip(), //客户端IP
'referer' => '', //referer地址
'charset' => '', //字符串编码
'gzipcompress' => '', //gzip
'authkey' => '', //authkey 认证码
'timenow' => array(), //当前时间
'PHP_SELF' => '', //PHP_SELF
'siteurl' => '', //网站地址
'siteroot' => '', //网站根目录
'config' => array(), //配置变量数组
'setting' => array(), //设置变量数组
'member' => array(), //用户信息数组
'group' => array(), //用户组数组
'cookie' => array(), //cookie数组
'style' => array(), //风格数组
'cache' => array(), //缓存列表数组
'session' => array(), //session变量数组
'lang' => array(), //语言包数组
'my_app' => array(), //我的应用数组
'my_userapp' => array(), //用户应用数组
'fid' => 0,
'tid' => 0,
'forum' => array(), //论坛板块数组
'thread' => array(), //论坛相关帖子数组
'rssauth' => '', //RSS订阅认证
'home' => array(), //home功能相关数组
'space' => array(), //space功能相关数组
'block' => array(), //块信息数组
'article' => array(),
'action' => array(
'action' => APPTYPEID,
'fid' => 0,
'tid' => 0,
),
'mobile' => '', //手机信息
);
//以上定义了$_G超级变量的部分内容。都是系统以后要用到的。写在一个大数组中，方便使用
$_G['PHP_SELF'] = htmlspecialchars($_SERVER['SCRIPT_NAME'] ? $_SERVER['SCRIPT_NAME'] : $_SERVER['PHP_SELF']);
//当前脚本地址写入$_G超级变量中
$_G['basescript'] = CURSCRIPT; //当前脚本
$_G['basefilename'] = basename($_G['PHP_SELF']); //当前脚本名称
$_G['siteurl'] = htmlspecialchars('http://'.$_SERVER['HTTP_HOST'].preg_replace("/\/+(api)?\/*$/i", '', substr($_G['PHP_SELF'], 0, strrpos($_G['PHP_SELF'], '/'))).'/');//网站地址
$_G['siteroot'] = substr($_G['PHP_SELF'], 0, -strlen($_G['basefilename']));//网站根地址
if(defined('SUB_DIR')) { //二级目录设置
$_G['siteurl'] = str_replace(SUB_DIR, '/', $_G['siteurl']);
$_G['siteroot'] = str_replace(SUB_DIR, '/', $_G['siteroot']);
}
$this->var = & $_G;
}
function _init_input() { //输入初始化方法
if (isset($_GET['GLOBALS']) ||isset($_POST['GLOBALS']) || isset($_COOKIE['GLOBALS']) || isset($_FILES['GLOBALS'])) {
system_error('request_tainting');
}
if(!MAGIC_QUOTES_GPC) {
$_GET = daddslashes($_GET);
$_POST = daddslashes($_POST);
$_COOKIE = daddslashes($_COOKIE);
$_FILES = daddslashes($_FILES);
}
//以上代码未GPC安全机制，进行转义
$prelength = strlen($this->config['cookie']['cookiepre']);
foreach($_COOKIE as $key => $val) {
if(substr($key, 0, $prelength) == $this->config['cookie']['cookiepre']) {
$this->var['cookie'][substr($key, $prelength)] = $val;
}
}
//以上代码意思是，如果cookie的键值等于定义的键值，那么截取cookiepre
$_GET['diy'] = empty($_GET['diy']) ? '' : $_GET['diy'];
if($_SERVER['REQUEST_METHOD'] == 'POST' && !empty($_POST)) {
$_GET = array_merge($_GET, $_POST);
}
//合并$_POST,$_GET
foreach($_GET as $k => $v) {
$this->var['gp_'.$k] = $v;
}
//然后把$_POST和$_GET的值都赋予gp变量中,方便使用
$this->var['mod'] = empty($this->var['gp_mod']) ? '' : htmlspecialchars($this->var['gp_mod']);
//获得$mod变量 ?mod=xxx,则$this->var['mod']为xxx
$this->var['inajax'] = empty($this->var['gp_inajax']) ? 0 : (empty($this->var['config']['output']['ajaxvalidate']) ? 1 : ($_SERVER['REQUEST_METHOD'] == 'GET' && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest' || $_SERVER['REQUEST_METHOD'] == 'POST' ? 1 : 0));
//是否需要ajax方式
$this->var['page'] = empty($this->var['gp_page']) ? 1 : max(1, intval($this->var['gp_page']));
//页面获取,最小为1
$this->var['sid'] = $this->var['cookie']['sid'] = isset($this->var['cookie']['sid']) ? htmlspecialchars($this->var['cookie']['sid']) : '';
//sid获取
}
function _init_config() { //获得配置文件
$_config = array();
@include DISCUZ_ROOT.'./config/config_global.php';//加载全局配置文件
if(empty($_config)) {
if(!file_exists(DISCUZ_ROOT.'./data/install.lock')) {
header('location: install');
exit;
} else {
system_error('config_notfound');
}
}
//以上代码为：如果config不存在，要么没安装，要么文件不存在，系统报错
if(empty($_config['security']['authkey'])) {
$_config['security']['authkey'] = md5($_config['cookie']['cookiepre'].$_config['db'][1]['dbname']);
}
//设置安全验证的authkey
if(empty($_config['debug']) || !file_exists(libfile('function/debug'))) {
define('DISCUZ_DEBUG', false);
} elseif($_config['debug'] === 1 || $_config['debug'] === 2 || !empty($_REQUEST['debug']) && $_REQUEST['debug'] === $_config['debug']) {
define('DISCUZ_DEBUG', true);
if($_config['debug'] == 2) {
error_reporting(E_ALL);
}
} else {
define('DISCUZ_DEBUG', false);
}
//以上代码为是否调试模式，
define('STATICURL', !empty($_config['output']['staticurl']) ? $_config['output']['staticurl'] : 'static/');
//定义静态文件常量,如：css,img等，如果$_config['output']['staticurl']为空，则是默认的static目录，就是默认目录
$this->var['staticurl'] = STATICURL;
$this->config = & $_config;
$this->var['config'] = & $_config;
//引用$_config变量，改变$this->config,则$_config改变，保持统一
if(substr($_config['cookie']['cookiepath'], 0, 1) != '/') {
$this->var['config']['cookie']['cookiepath'] = '/'.$this->var['config']['cookie']['cookiepath'];
}
//设置cookie域，一般是设置目录域。/不存在则加上/,安全性更高
$this->var['config']['cookie']['cookiepre'] = $this->var['config']['cookie']['cookiepre'].substr(md5($this->var['config']['cookie']['cookiepath'].'|'.$this->var['config']['cookie']['cookiedomain']), 0, 4).'_';
//定义cookie前缀,如定义为xxx_;则为$cookie['xxx_uid]
$this->var['authkey'] = md5($_config['security']['authkey'].$_SERVER['HTTP_USER_AGENT']);
//得到authkey
}
function _init_output() { //输出初始化方法
if($this->config['security']['urlxssdefend'] && $_SERVER['REQUEST_METHOD'] == 'GET' && !empty($_SERVER['REQUEST_URI'])) {
$this->_xss_check();
}
if($this->config['security']['attackevasive'] && (!defined('CURSCRIPT') || !in_array($this->var['mod'], array('seccode', 'secqaa', 'swfupload')))) {
require_once libfile('misc/security', 'include');
}
//验证码设置，加载include/misc/misc_security.php文件,验证功能;
if(!empty($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') === false) {
$this->config['output']['gzip'] = false;
}
//是否开启gzip,如果不支持gzip，则定义为false
$allowgzip = $this->config['output']['gzip'] && empty($this->var['inajax']) && $this->var['mod'] != 'attachment' && EXT_OBGZIP;
setglobal('gzipcompress', $allowgzip);
//把$allowgzip写入全局变量中
ob_start($allowgzip ? 'ob_gzhandler' : null);
//定义输出缓存
setglobal('charset', $this->config['output']['charset']);
//把配置文件中的字符集赋予全局变量中
define('CHARSET', $this->config['output']['charset']);
if($this->config['output']['forceheader']) {
@header('Content-Type: text/html; charset='.CHARSET);//设置网页编码,强制输出
}
}
function reject_robot() { //拒绝机器人访问，设置为403错误
if(IS_ROBOT) {
exit(header("HTTP/1.1 403 Forbidden"));
}
}
function _xss_check() { //检测xss漏洞,UBB
$temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($tmp,'CONTENT-TRANSFER-ENCODING')!==false) {
system_error('request_tainting');
}
return true;
}
function _get_client_ip() { //得到客户端IP
$ip = $_SERVER['REMOTE_ADDR'];
if (isset($_SERVER['HTTP_CLIENT_IP']) && preg_match('/^([0-9]{1,3}\.){3}[0-9]{1,3}$/', $_SERVER['HTTP_CLIENT_IP'])) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif(isset($_SERVER['HTTP_X_FORWARDED_FOR']) AND preg_match_all('#\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}#s', $_SERVER['HTTP_X_FORWARDED_FOR'], $matches)) {
foreach ($matches[0] AS $xip) {
if (!preg_match('#^(10|172\.16|192\.168)\.#', $xip)) {
$ip = $xip;
break;
}
}
}
return $ip;
}
function _init_db() { //初始化数据库
$class = 'db_mysql';
if(count(getglobal('config/db/slave'))) { //是否存在从数据连接，存在则初始化
require_once libfile('class/mysql_slave');
$class = 'db_mysql_slave';
}
$this->db = & DB::object($class);
$this->db->set_config($this->config['db']);
$this->db->connect(); //建立数据库连接
}
function _init_session() { //session初始化方法
$this->session = new discuz_session(); //new discuz_session类
if($this->init_session)
{
$this->session->init($this->var['cookie']['sid'], $this->var['clientip'], $this->var['uid']);
$this->var['sid'] = $this->session->sid; //设置sid
$this->var['session'] = $this->session->var; //设置session
if($this->var['sid'] != $this->var['cookie']['sid']) {
dsetcookie('sid', $this->var['sid'], 86400); //如果sid不为cookie中的sid,则重写sid到cookie
}
if($this->session->isnew) {
if(ipbanned($this->var['clientip'])) {
$this->session->set('groupid', 6); //如果发现IP在禁止范围里，则设置该客户端用户组为6，则：禁止IP用户组
}
}
if($this->session->get('groupid') == 6) {
$this->var['member']['groupid'] = 6;
sysmessage('user_banned'); //提示IP禁止
}
if($this->var['uid'] && ($this->session->isnew || ($this->session->get('lastactivity') + 600) < TIMESTAMP)) {
$this->session->set('lastactivity', TIMESTAMP);
//最近活动检测，600秒
if($this->session->isnew) {
DB::update('common_member_status', array('lastip' => $this->var['clientip'], 'lastvisit' => TIMESTAMP), "uid='".$this->var['uid']."'");
} //如果用户在600秒里不活动，则设置最后访问时间点
}
}
}
function _init_user() { //用户初始化方法
if($this->init_user) {
if($auth = getglobal('auth', 'cookie')) { //得到auth,username\tuid的加密信息
$auth = daddslashes(explode("\t", authcode($auth, 'DECODE'))); //进行解密
}
list($discuz_pw, $discuz_uid) = empty($auth) || count($auth) < 2 ? array('', '') : $auth;
//得到用户名和用户密码，如果auth为空，或者缺失uid和username中的一个，则为空
if($discuz_uid) {
$user = getuserbyuid($discuz_uid); //如果uid存在，则得到该用户信息
}
if(!empty($user) && $user['password'] == $discuz_pw) {
$this->var['member'] = $user; //如果用户存在，且密码正确，则用户信息写进全局变量中
} else {
$user = array(); //user定义为空数组
$this->_init_guest(); //否则为游客,游客初始化方法
}
if($user && $user['groupexpiry'] > 0 && $user['groupexpiry'] < TIMESTAMP && getgpc('mod') != 'spacecp' && getgpc('do') != 'expiry' && CURSCRIPT != 'home') {
dheader('location: home.php?mod=spacecp&ac=usergroup&do=expiry');
}
//用户组过期检测
$this->cachelist[] = 'usergroup_'.$this->var['member']['groupid'];
//用户组数据缓存
if($user && $user['adminid'] > 0 && $user['groupid'] != $user['adminid']) {
$this->cachelist[] = 'admingroup_'.$this->var['member']['adminid']; //管理员用户组缓存
}
} else {
$this->_init_guest(); //游客
}
if(empty($this->var['cookie']['lastvisit'])) {
$this->var['member']['lastvisit'] = TIMESTAMP - 3600;
dsetcookie('lastvisit', TIMESTAMP - 3600, 86400 * 30); //cookie中如果为记录最后访问时间，则写入
} else {
$this->var['member']['lastvisit'] = $this->var['cookie']['lastvisit'];//否则，写入全局变量
}
setglobal('uid', getglobal('uid', 'member'));
setglobal('username', addslashes(getglobal('username', 'member')));
setglobal('adminid', getglobal('adminid', 'member'));
setglobal('groupid', getglobal('groupid', 'member'));
//以上四行是把用户的uid，用户名，管理组id，用户组写入全局变量中
}
function _init_guest() { //游客初始化方法
setglobal('member', array( 'uid' => 0, 'username' => '', 'adminid' => 0, 'groupid' => 7, 'credits' => 0, 'timeoffset' => 9999));
}
function _init_cron() { //计划任务初始化
if($this->init_cron && $this->init_setting) {
if($this->var['cache']['cronnextrun'] <= TIMESTAMP) {
require_once libfile('class/cron'); //加载source/class/class_cron.php文件
discuz_cron::run(); //运行
}
}
}
function _init_misc() {
if(!$this->init_misc) {
return false;
}
lang('core'); //加载core语言包
if($this->init_setting && $this->init_user) {
if(!isset($this->var['member']['timeoffset']) || $this->var['member']['timeoffset'] == 9999 || $this->var['member']['timeoffset'] === '') {
$this->var['member']['timeoffset'] = $this->var['setting']['timeoffset'];
}
}
//设置用户时区
$timeoffset = $this->init_setting ? $this->var['member']['timeoffset'] : $this->var['setting']['timeoffset'];
$this->var['timenow'] = array(
'time' => dgmdate(TIMESTAMP),
'offset' => $timeoffset >= 0 ? ($timeoffset == 0 ? '' : '+'.$timeoffset) : $timeoffset
);
$this->timezone_set($timeoffset);
$this->var['formhash'] = formhash(); //得到FORMHASH
define('FORMHASH', $this->var['formhash']); //定义为常量
if($this->init_user) {
if($this->var['group'] && isset($this->var['group']['allowvisit']) && !$this->var['group']['allowvisit']) {
if($this->var['uid']) {
sysmessage('user_banned', null); //检测是否为禁止访问
} elseif((!defined('ALLOWGUEST') || !ALLOWGUEST) && !in_array(CURSCRIPT, array('member', 'api')) && !$this->var['inajax']) {
dheader('location: member.php?mod=logging&action=login&referer='.rawurlencode($_SERVER['REQUEST_URI']));
}
}
if($this->var['member']['status'] == -1) {
sysmessage('user_banned', null); //如果用户状态为-1,则提示禁止访问
}
}
if($this->var['setting']['ipaccess'] && !ipaccess($this->var['clientip'], $this->var['setting']['ipaccess'])) {
sysmessage('user_banned', null); //ip权限检测
}
if($this->var['setting']['bbclosed']) {
if($this->var['uid'] && ($this->var['group']['allowvisit'] == 2 || $this->var['groupid'] == 1)) {
} elseif(in_array(CURSCRIPT, array('admin', 'member', 'api')) || defined('ALLOWGUEST') && ALLOWGUEST) {
} else {
$closedreason = DB::result_first("SELECT svalue FROM ".DB::table('common_setting')." WHERE skey='closedreason'");
$closedreason = str_replace(':', ':', $closedreason);
showmessage($closedreason ? $closedreason : 'board_closed', NULL, array(), array('login' => 1));
}
}
//以上是论坛如果为关闭，只有管理员可以访问，其他则提示关闭原因
if(CURSCRIPT != 'admin' && !(in_array($this->var['mod'], array('logging', 'seccode')))) {
periodscheck('visitbanperiods'); //私密板块访问设置
}
if(defined('IN_MOBILE')) {
$this->var['tpp'] = $this->var['setting']['mobile']['mobiletopicperpage'] ? intval($this->var['setting']['mobile']['mobiletopicperpage']) : 20;
$this->var['ppp'] = $this->var['setting']['mobile']['mobilepostperpage'] ? intval($this->var['setting']['mobile']['mobilepostperpage']) : 5;
} else {
$this->var['tpp'] = $this->var['setting']['topicperpage'] ? intval($this->var['setting']['topicperpage']) : 20;
$this->var['ppp'] = $this->var['setting']['postperpage'] ? intval($this->var['setting']['postperpage']) : 10;
}
//wap访问设置
if($this->var['setting']['nocacheheaders']) {
@header("Expires: -1");
@header("Cache-Control: no-store, private, post-check=0, pre-check=0, max-age=0", FALSE);
@header("Pragma: no-cache");
}
//以上五行作用是header cache状态设置
if($this->session->isnew && $this->var['uid']) {
updatecreditbyaction('daylogin', $this->var['uid']); //每日登陆增加积分设置
include_once libfile('function/stat');
updatestat('login', 1);
if(defined('IN_MOBILE')) {
updatestat('mobilelogin', 1); //MOBILE
}
if($this->var['setting']['connect']['allow'] && $this->var['member']['conisbind']) {
updatestat('connectlogin', 1);
}
}
if($this->var['member']['conisbind'] && $this->var['setting']['connect']['newbiespan'] !== '') {
$this->var['setting']['newbiespan'] = $this->var['setting']['connect']['newbiespan'];
}
$lastact = TIMESTAMP."\t".htmlspecialchars(basename($this->var['PHP_SELF']))."\t".htmlspecialchars($this->var['mod']);
dsetcookie('lastact', $lastact, 86400);
setglobal('currenturl_encode', base64_encode('http://'.$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI']));
//设置最后动作
if($this->var['setting']['magicstatus'] && !$this->var['group']['allowmagics']) {
$this->var['setting']['magicstatus'] = false;
$this->var['setting']['magics'] = array();
unset($this->var['setting']['spacenavs']['magic']);
}
if((!empty($this->var['gp_fromuid']) || !empty($this->var['gp_fromuser'])) && ($this->var['setting']['creditspolicy']['promotion_visit'] || $this->var['setting']['creditspolicy']['promotion_register'])) {
require_once libfile('misc/promotion', 'include');
}
$this->var['seokeywords'] = !empty($this->var['setting']['seokeywords'][CURSCRIPT]) ? $this->var['setting']['seokeywords'][CURSCRIPT] : ''; //SEO keywords
$this->var['seodescription'] = !empty($this->var['setting']['seodescription'][CURSCRIPT]) ? $this->var['setting']['seodescription'][CURSCRIPT] : ''; //SEO 网站描述
}
function _init_setting() {
if($this->init_setting) {
if(empty($this->var['setting'])) {
$this->cachelist[] = 'setting'; //缓存设置文件
}
if(empty($this->var['style'])) {
$this->cachelist[] = 'style_default'; //风格缓存设置
}
if(!isset($this->var['cache']['cronnextrun'])) {
$this->cachelist[] = 'cronnextrun'; //缓存计划任务
}
}
!empty($this->cachelist) && loadcache($this->cachelist);
if(!is_array($this->var['setting'])) {
$this->var['setting'] = array();
}
if($this->var['member'] && $this->var['group']['radminid'] == 0 && $this->var['member']['adminid'] > 0 && $this->var['member']['groupid'] != $this->var['member']['adminid'] && !empty($this->var['cache']['admingroup_'.$this->var['member']['adminid']])) {
$this->var['group'] = array_merge($this->var['group'], $this->var['cache']['admingroup_'.$this->var['member']['adminid']]);
}
}
function _init_style() { //模板初始化方法
$styleid = !empty($this->var['cookie']['styleid']) ? $this->var['cookie']['styleid'] : 0;
if(intval(!empty($this->var['forum']['styleid']))) {
$this->var['cache']['style_default']['styleid'] = $styleid = $this->var['forum']['styleid'];
}
if(intval(!empty($this->var['category']['styleid']))) {
$this->var['cache']['style_default']['styleid'] = $styleid = $this->var['category']['styleid'];
}
if($styleid && $styleid != $this->var['setting']['styleid']) {
loadcache('style_'.$styleid);
if($this->var['cache']['style_'.$styleid]) {
$this->var['style'] = $this->var['cache']['style_'.$styleid];
}
}
if(is_array($this->var['style'])) {
foreach ($this->var['style'] as $key => $val) {
$key = strtoupper($key);
if(!defined($key) && !is_array($val)) {
define($key, $val);
}
}
}
}
function _init_memory() { //缓存设置
$this->mem = new discuz_memory();
if($this->init_memory) {
$this->mem->init($this->config['memory']);
}
$this->var['memory'] = $this->mem->type;
}
function _init_mobile() { //手机访问设置
if(!$this->var['setting'] || !$this->init_mobile || !$this->var['setting']['mobile']['allowmobile'] || !is_array($this->var['setting']['mobile']) || IS_ROBOT) {
$nomobile = true; //允许手机访问
}
if($_GET['mobile'] === 'no') {
dsetcookie('mobile', 'no', 3600);
$nomobile = true;
} elseif($this->var['cookie']['mobile'] == 'no' && $_GET['mobile'] === 'yes') {
dsetcookie('mobile', '');
} elseif($this->var['cookie']['mobile'] == 'no') {
$nomobile = true;
}
if(!checkmobile()) { //检测是否为手机访问
$nomobile = true;
}
if((!$this->var['setting']['mobile']['mobileforward'] && $_GET['mobile'] !== 'yes') || $nomobile) {
if($_SERVER['HTTP_HOST'] == $this->var['setting']['domain']['app']['mobile'] && $this->var['setting']['domain']['app']['default']) {
dheader("Location:http://".$this->var['setting']['domain']['app']['default'].$_SERVER['REQUEST_URI']);
} else {
return;
}
}
if(strpos($this->var['setting']['domain']['defaultindex'], CURSCRIPT) === false && CURSCRIPT != 'forum' && !$_GET['mod']) {
if($this->var['setting']['domain']['app']['mobile']) {
$mobileurl = 'http://'.$this->var['setting']['domain']['app']['mobile'];
} else {
if($this->var['setting']['domain']['app']['forum']) {
$mobileurl = 'http://'.$this->var['setting']['domain']['app']['forum'].'?mobile=yes';
} else {
$mobileurl = $this->var['siteurl'].'forum.php?mobile=yes';
}
}
dheader("location:$mobileurl");
}
define('IN_MOBILE', true);
setglobal('gzipcompress', 0);
$query_sting_tmp = preg_replace(array('/&simpletype=\w+/', '/simpletype=\w+/', '/&mobile=yes/', '/mobile=yes/'), array(), $_SERVER['QUERY_STRING']);
$this->var['setting']['mobile']['nomobileurl'] = ($this->var['setting']['domain']['app']['forum'] ? 'http://'.$this->var['setting']['domain']['app']['forum'].'/' : $this->var['siteurl']).$this->var['basefilename'].($query_sting_tmp ? '?'.$query_sting_tmp.'&' : '?').'mobile=no';
$this->var['setting']['lazyload'] = 0;
if('utf-8' != CHARSET) {
if(strtolower($_SERVER['REQUEST_METHOD']) === 'post') {
foreach($_POST AS $pk => $pv) {
if(!is_numeric($pv)) {
$this->var['gp_'.$pk] = $_GET[$pk] = $_POST[$pk] = $this->mobile_iconv_recurrence($pv);
}
}
}
}
if($_GET['simpletype']) {
if($_GET['simpletype'] == 'yes') {
$this->var['setting']['mobile']['mobilesimpletype'] = 1;
dsetcookie('simpletype', 1, 86400);
} else {
$this->var['setting']['mobile']['mobilesimpletype'] = 0;
dsetcookie('simpletype', 0, 86400);
}
} elseif($this->var['cookie']['simpletype']) {
$this->var['setting']['mobile']['mobilesimpletype'] = $this->var['cookie']['simpletype'] == 1 ? 1 : 0 ;
}
if(!$this->var['setting']['mobile']['mobilesimpletype']) {
$this->var['setting']['imagemaxwidth'] = 224;
}
$this->var['setting']['regstatus'] = $this->var['setting']['mobile']['mobileregister'] ? $this->var['setting']['regstatus'] : 0 ;
if(!$this->var['setting']['mobile']['mobileseccode']) {
$this->var['setting']['seccodestatus'] = 0;
}
$this->var['setting']['seccodedata']['type'] = 99;
$this->var['setting']['thumbquality'] = 50;
$this->var['setting']['mobile']['simpletypeurl'] = array();
$this->var['setting']['mobile']['simpletypeurl'][0] = $this->var['siteurl'].$this->var['basefilename'].($query_sting_tmp ? '?'.$query_sting_tmp.'&' : '?').'simpletype=no&mobile=yes' ;
$this->var['setting']['mobile']['simpletypeurl'][1] = $this->var['siteurl'].$this->var['basefilename'].($query_sting_tmp ? '?'.$query_sting_tmp.'&' : '?').'simpletype=yes&mobile=yes';
unset($query_sting_tmp);
ob_start();
}
function timezone_set($timeoffset = 0) { //时区设置
if(function_exists('date_default_timezone_set')) {
@date_default_timezone_set('Etc/GMT'.($timeoffset > 0 ? '-' : '+').(abs($timeoffset)));
}
}
function mobile_iconv_recurrence($value) { //手机访问再次转码
if(is_array($value)) {
foreach($value AS $key => $val) {
$value[$key] = $this->mobile_iconv_recurrence($val);
}
} else {
$value = daddslashes(diconv(stripslashes($value), 'utf-8', CHARSET));
}
return $value;
}
}
class db_mysql //数据库类
{
var $tablepre;
var $version = '';
var $querynum = 0;
var $slaveid = 0;
var $curlink;
var $link = array();
var $config = array();
var $sqldebug = array();
var $map = array();
function db_mysql($config = array()) {
if(!empty($config)) {
$this->set_config($config);
}
}
function set_config($config) {
$this->config = &$config;
$this->tablepre = $config['1']['tablepre'];
if(!empty($this->config['map'])) {
$this->map = $this->config['map'];
}
}
function connect($serverid = 1) {
if(empty($this->config) || empty($this->config[$serverid])) {
$this->halt('config_db_not_found');
}
$this->link[$serverid] = $this->_dbconnect(
$this->config[$serverid]['dbhost'],
$this->config[$serverid]['dbuser'],
$this->config[$serverid]['dbpw'],
$this->config[$serverid]['dbcharset'],
$this->config[$serverid]['dbname'],
$this->config[$serverid]['pconnect']
);
$this->curlink = $this->link[$serverid];
}
function _dbconnect($dbhost, $dbuser, $dbpw, $dbcharset, $dbname, $pconnect) {
$link = null;
$func = empty($pconnect) ? 'mysql_connect' : 'mysql_pconnect';
if(!$link = @$func($dbhost, $dbuser, $dbpw, 1)) {
$this->halt('notconnect');
} else {
$this->curlink = $link;
if($this->version() > '4.1') {
$dbcharset = $dbcharset ? $dbcharset : $this->config[1]['dbcharset'];
$serverset = $dbcharset ? 'character_set_connection='.$dbcharset.', character_set_results='.$dbcharset.', character_set_client=binary' : '';
$serverset .= $this->version() > '5.0.1' ? ((empty($serverset) ? '' : ',').'sql_mode=\'\'') : '';
$serverset && mysql_query("SET $serverset", $link);
}
$dbname && @mysql_select_db($dbname, $link);
}
return $link;
}
function table_name($tablename) {
if(!empty($this->map) && !empty($this->map[$tablename])) {
$id = $this->map[$tablename];
if(!$this->link[$id]) {
$this->connect($id);
}
$this->curlink = $this->link[$id];
} else {
$this->curlink = $this->link[1];
}
return $this->tablepre.$tablename;
}
function select_db($dbname) {
return mysql_select_db($dbname, $this->curlink);
}
function fetch_array($query, $result_type = MYSQL_ASSOC) {
return mysql_fetch_array($query, $result_type);
}
function fetch_first($sql) {
return $this->fetch_array($this->query($sql));
}
function result_first($sql) {
return $this->result($this->query($sql), 0);
}
function query($sql, $type = '') {
if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
$starttime = dmicrotime();
}
$func = $type == 'UNBUFFERED' && @function_exists('mysql_unbuffered_query') ?
'mysql_unbuffered_query' : 'mysql_query';
if(!($query = $func($sql, $this->curlink))) {
if(in_array($this->errno(), array(2006, 2013)) && substr($type, 0, 5) != 'RETRY') {
$this->connect();
return $this->query($sql, 'RETRY'.$type);
}
if($type != 'SILENT' && substr($type, 5) != 'SILENT') {
$this->halt('query_error', $sql);
}
}
if(defined('DISCUZ_DEBUG') && DISCUZ_DEBUG) {
$this->sqldebug[] = array($sql, number_format((dmicrotime() - $starttime), 6), debug_backtrace());
}
$this->querynum++;
return $query;
}
function affected_rows() {
return mysql_affected_rows($this->curlink);
}
function error() {
return (($this->curlink) ? mysql_error($this->curlink) : mysql_error());
}
function errno() {
return intval(($this->curlink) ? mysql_errno($this->curlink) : mysql_errno());
}
function result($query, $row = 0) {
$query = @mysql_result($query, $row);
return $query;
}
function num_rows($query) {
$query = mysql_num_rows($query);
return $query;
}
function num_fields($query) {
return mysql_num_fields($query);
}
function free_result($query) {
return mysql_free_result($query);
}
function insert_id() {
return ($id = mysql_insert_id($this->curlink)) >= 0 ? $id : $this->result($this->query("SELECT last_insert_id()"), 0);
}
function fetch_row($query) {
$query = mysql_fetch_row($query);
return $query;
}
function fetch_fields($query) {
return mysql_fetch_field($query);
}
function version() {
if(empty($this->version)) {
$this->version = mysql_get_server_info($this->curlink);
}
return $this->version;
}
function close() {
return mysql_close($this->curlink);
}
function halt($message = '', $sql = '') {
require_once libfile('class/error');
discuz_error::db_error($message, $sql);
}
}
class DB //数据库操作
class discuz_session //session类
class discuz_memory //缓存初始化 支持eaccelerator/xcach/memcache
?>
查看完整版本： Discuz! X2 核心类源码分析-discuz_core
Tags: discuz