define('phpcms_root', str_replace("\", '/', substr(dirname(__file__), 0, -7))); //定义根目录
define('microtime_start', microtime()); //设置起始时间
define('in_phpcms', true); //网站入口判断变量
define('magic_quotes_gpc', get_magic_quotes_gpc()); //设置魔法字会转换开关
define('time', time()); //生成时间
set_include_path(phpcms_root.'include/'); //加载文件目录
set_magic_quotes_runtime(0); //设置魔法字运行时间开关，0 为关
unset($lang, $http_env_vars, $http_post_vars, $http_get_vars, $http_post_files, $http_cookie_vars);//清空变量
require 'config.inc.php'; //核心配置文件
require 'global.func.php'; //全局功能函数
require 'dir.func.php'; //目录函数操作功能函数
require 'url.func.php'; //url相关操作函数
require 'output.class.php'; //数据输出相关函数
require 'priv_group.class.php'; //组权限类
require 'times.class.php'; //时间处理类
require phpcms_root.'languages/'.lang.'/phpcms.lang.php'; //加载语言函数包
errorlog ? set_error_handler('phpcms_error') : error_reporting(e_error | e_warning | e_parse); //设置错误处理机智
define('ip', ip());
define('http_referer', isset($_server['http_referer']) ? $_server['http_referer'] : '');
define('script_name', isset($_server['script_name']) ? $_server['script_name'] : preg_replace("/(.*).php(.*)/i", "http://www.cnblogs.com/igaofen/admin/file://1.php/", $_server['php_self']));
define('query_string', $_server['query_string']);
define('path_info', isset($_server['path_info']) ? $_server['path_info'] : '');
define('domain', isset($_server['server_name']) ? $_server['server_name'] : preg_replace("/([^:]*)[:0-9]*/i", "http://www.cnblogs.com/igaofen/admin/file://0.0.0.1/", $_server['http_host']));
define('scheme', $_server['server_port'] == '443' ? 'https://' : 'http://');
define('site_url', scheme.$_server['http_host'].phpcms_path);
define('relate_url', isset($_server['request_uri']) ? $_server['request_uri'] : script_name.(query_string ? '?'.query_string : path_info));
define('url', scheme.$_server['http_host'].relate_url);
define('relate_referer',urlencode(relate_url));
//定义一系列与服务器相关的变量，为后面的生成cache相关参数作准备
if(function_exists('date_default_timezone_set')) date_default_timezone_set(timezone);//设置time等函数的默认时区
header('content-type: text/html; charset='.charset); //设置字符集
if(cache_page && !defined('in_admin')) cache_page_start(); //看是否调用页面缓存
if(gzip && extension_loaded('zlib')) ini_set('zlib.output_compression', 'on'); //是否gzip优化
ob_start(); //缓存开始，启动ob_start 输出部份转的缓存，flush后，全部输出
$dbclass = 'db_'.db_database; //生成db.class的名字
require $dbclass.'.class.php'; //加载db的数据库类文件
$db = new $dbclass; //实例发数据库
$db->connect(db_host, db_user, db_pw, db_name, db_pconnect, db_charset); //连接数据库
require 'session_'.session_storage.'.class.php'; //加载session类
$session = new session(); //初始化session
session_set_cookie_params(0, cookie_path, cookie_domain); //设置cookies
if($_request) //转义request的变量
{
if(magic_quotes_gpc)
{
$_request = new_stripslashes($_request);
if($_cookie) $_cookie = new_stripslashes($_cookie);
}
if(!defined('in_admin')) $_request = filter_xss($_request, allowed_htmltags);
extract($db->escape($_request), extr_skip);
if($_cookie) $db->escape($_cookie);
}
if(query_string && strpos(query_string, '=') === false && preg_match("/^(.*).(htm|html|shtm|shtml)$/", query_string, $urlvar))
{
parse_str(str_replace(array('/', '-', ' '), array('&', '=', ''), $urlvar[1]));
}
$cache = cache_read('common.php'); //读cache，comman.php生成了一些网站初始的变量，比如栏目名，等，可到data/cahce/下查看
if(!$cache)
{
require_once 'cache.func.php';
cache_all();
$cache = cache_read('common.php');
}
extract($cache); //将数组转成变量
unset($cache); //销毁变量
if($phpcms['enable_ipbanned'] && ip_banned(ip)) showmessage($lang['administrator_banned_this_ip']);//ip地址限制
if(!defined('in_admin')) ////非法信息屏蔽作用范围（0 禁用，1 前台，2 全站）
{
if(filter_enable && filter_word()) showmessage('the content including illegal information: '.illegal_word.' .');
if($phpcms['minrefreshtime'])
{
$cc = new times();
$cc->set('cc', $phpcms['minrefreshtime'], 1);
if($cc->check()) showmessage('do not refresh the page in '.$phpcms['minrefreshtime'].' seconds!');
$cc->add();
unset($cc);
}
if(!isset($forward)) $forward = http_referer;
}
$m = $temp = array();
if(!isset($mod)) $mod = 'phpcms'; //设置模块，如果什么也没有设，就用phpcms
if($mod != 'phpcms') //如果有设置，调用相关模块的信息,并读取他们生成的cahce
{
isset($module[$mod]) or exit($lang['module_not_exists']);
$langfile = defined('in_admin') ? $mod.'_admin' : $mod;
@include phpcms_root.'languages/'.lang.'/'.$langfile.'.lang.php';
$m = cache_read('module_'.$mod.'.php');
}
$_userid = 0;
$_username = '';
$_groupid = 3;
$phpcms_auth = get_cookie('auth'); //判断是否以前登陆过，并调取认证信息,权限判断
if($phpcms_auth)
{
$auth_key = md5(auth_key.$_server['http_user_agent']);
list($_userid, $_password) = explode(" ", phpcms_auth($phpcms_auth, 'decode', $auth_key));
$_userid = intval($_userid);
$sql_member = "select * from `".db_pre."member_cache` where `userid`=$_userid";
$r = $db->get_one($sql_member);
if(!$r && cache_member())
{
$r = $db->get_one($sql_member);
}
if($r && $r['password'] === $_password)
{
if($r['groupid'] == 2)
{
set_cookie('auth', '');
showmessage($lang['userid_banned_by_administrator']);
}
@extract($r, extr_prefix_all, '');
}
else
{
$_userid = 0;
$_username = '';
$_groupid = 3;
set_cookie('auth', '');
}
unset($r, $phpcms_auth, $phpcms_auth_key, $_password, $sql_member);
}
$g = cache_read('member_group_'.$_groupid.'.php'); //读会员的组信息
$priv_group = new priv_group(); //初始化组用户信息
define('skin_path', 'templates/'.tpl_name.'/skins/'.tpl_css.'/'); //加载模板的css文件
define('passport_enable', ($phpcms['uc'] || $phpcms['enablepassport'] || $phpcms['enableserverpassport']) ? 1 : 0); //设置uc,等其它密码通行证，开关
?>
本文来自csdn博客，转载请标明出处：http://blog.csdn.net/guwenzhong/archive/2009/03/05/3959500.aspx
