<?php

/**
 *      [Discuz!] (C)2001-2099 Comsenz Inc.
 *      This is NOT a freeware, use is subject to license terms
 *
 *      $Id: class_core.php 32295 2012-12-20 09:10:57Z cnteacher $
 */

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;

	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();
		$this->_init_config();
		$this->_init_input();
		$this->_init_output();
	}

	function init() {
		if(!$this->initated) {
			$this->_init_db();
			$this->_init_memory();
			$this->_init_user();
			$this->_init_session();
			$this->_init_setting();
			$this->_init_mobile();
			$this->_init_cron();
			$this->_init_misc();
		}
		$this->initated = true;
	}

	function _init_env() {

		error_reporting(E_ERROR);
		if(PHP_VERSION < '5.3.0') {
			set_magic_quotes_runtime(0);
		}

		define('DISCUZ_ROOT', substr(dirname(__FILE__), 0, -12));
		define('MAGIC_QUOTES_GPC', function_exists('get_magic_quotes_gpc') && get_magic_quotes_gpc());
		define('ICONV_ENABLE', function_exists('iconv'));
		define('MB_ENABLE', function_exists('mb_convert_encoding'));
		define('EXT_OBGZIP', function_exists('ob_gzhandler'));

		define('TIMESTAMP', time());
		$this->timezone_set();

		if(!defined('DISCUZ_CORE_FUNCTION') && !@include(DISCUZ_ROOT.'./source/function/function_core.php')) {
			exit('function_core.php is missing');
		}

		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');
			}
		}

		define('IS_ROBOT', checkrobot());

		foreach ($GLOBALS as $key => $value) {
			if (!isset($this->superglobal[$key])) {
				$GLOBALS[$key] = null; unset($GLOBALS[$key]);
			}
		}

		global $_G;
		$_G = array(
			'uid' => 0,
			'username' => '',
			'adminid' => 0,
			'groupid' => 1,
			'sid' => '',
			'formhash' => '',
			'timestamp' => TIMESTAMP,
			'starttime' => dmicrotime(),
			'clientip' => $this->_get_client_ip(),
			'referer' => '',
			'charset' => '',
			'gzipcompress' => '',
			'authkey' => '',
			'timenow' => array(),

			'PHP_SELF' => '',
			'siteurl' => '',
			'siteroot' => '',
			'siteport' => '',

			'config' => array(),
			'setting' => array(),
			'member' => array(),
			'group' => array(),
			'cookie' => array(),
			'style' => array(),
			'cache' => array(),
			'session' => array(),
			'lang' => array(),
			'my_app' => array(),
			'my_userapp' => array(),

			'fid' => 0,
			'tid' => 0,
			'forum' => array(),
			'thread' => array(),
			'rssauth' => '',

			'home' => array(),
			'space' => array(),

			'block' => array(),
			'article' => array(),

			'action' => array(
				'action' => APPTYPEID,
				'fid' => 0,
				'tid' => 0,
			),

			'mobile' => '',

		);
		$_G['PHP_SELF'] = htmlspecialchars($this->_get_script_url());
		$_G['basescript'] = CURSCRIPT;
		$_G['basefilename'] = basename($_G['PHP_SELF']);
		$sitepath = substr($_G['PHP_SELF'], 0, strrpos($_G['PHP_SELF'], '/'));
		if(defined('IN_API')) {
			$sitepath = preg_replace("/\/api\/?.*?$/i", '', $sitepath);
		} elseif(defined('IN_ARCHIVER')) {
			$sitepath = preg_replace("/\/archiver/i", '', $sitepath);
		}
		$_G['siteurl'] = htmlspecialchars('http://'.$_SERVER['HTTP_HOST'].$sitepath.'/');

		$url = parse_url($_G['siteurl']);
		$_G['siteroot'] = isset($url['path']) ? $url['path'] : '';
		$_G['siteport'] = empty($_SERVER['SERVER_PORT']) || $_SERVER['SERVER_PORT'] == '80' ? '' : ':'.$_SERVER['SERVER_PORT'];

		if(defined('SUB_DIR')) {
			$_G['siteurl'] = str_replace(SUB_DIR, '/', $_G['siteurl']);
			$_G['siteroot'] = str_replace(SUB_DIR, '/', $_G['siteroot']);
		}

		$this->var = & $_G;

	}

	function _get_script_url() {
		if($this->var['PHP_SELF'] === null){
			$scriptName = basename($_SERVER['SCRIPT_FILENAME']);
			if(basename($_SERVER['SCRIPT_NAME']) === $scriptName) {
				$this->var['PHP_SELF'] = $_SERVER['SCRIPT_NAME'];
			} else if(basename($_SERVER['PHP_SELF']) === $scriptName) {
				$this->var['PHP_SELF'] = $_SERVER['PHP_SELF'];
			} else if(isset($_SERVER['ORIG_SCRIPT_NAME']) && basename($_SERVER['ORIG_SCRIPT_NAME']) === $scriptName) {
				$this->var['PHP_SELF'] = $_SERVER['ORIG_SCRIPT_NAME'];
			} else if(($pos = strpos($_SERVER['PHP_SELF'],'/'.$scriptName)) !== false) {
				$this->var['PHP_SELF'] = substr($_SERVER['SCRIPT_NAME'],0,$pos).'/'.$scriptName;
			} else if(isset($_SERVER['DOCUMENT_ROOT']) && strpos($_SERVER['SCRIPT_FILENAME'],$_SERVER['DOCUMENT_ROOT']) === 0) {
				$this->var['PHP_SELF'] = str_replace('\\','/',str_replace($_SERVER['DOCUMENT_ROOT'],'',$_SERVER['SCRIPT_FILENAME']));
			} else {
				system_error('request_tainting');
			}
		}
		return $this->var['PHP_SELF'];
	}

	function _init_input() {
		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);
		}

		$prelength = strlen($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;
			}
		}


		if($_SERVER['REQUEST_METHOD'] == 'POST' && !empty($_POST)) {
			$_GET = array_merge($_GET, $_POST);
		}

		if(isset($_GET['diy'])) {
			$_GET['diy'] = empty($_GET['diy']) ? '' : $_GET['diy'];
		}

		foreach($_GET as $k => $v) {
			$this->var['gp_'.$k] = $v;
		}

		if(isset($this->var['gp_page'])) {
			$this->var['gp_page'] = rawurlencode($this->var['gp_page']);
		}

		$this->var['mod'] = empty($this->var['gp_mod']) ? '' : htmlspecialchars($this->var['gp_mod']);
		$this->var['inajax'] = empty($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));
		$this->var['page'] = empty($this->var['gp_page']) ? 1 : max(1, intval($this->var['gp_page']));
		$this->var['sid'] = $this->var['cookie']['sid'] = isset($this->var['cookie']['sid']) ? htmlspecialchars($this->var['cookie']['sid']) : '';
		$this->var['gp_handlekey'] = !empty($this->var['gp_handlekey']) && preg_match('/^\w+$/', $this->var['gp_handlekey']) ? $this->var['gp_handlekey'] : '';

		if(empty($this->var['cookie']['saltkey'])) {
			$this->var['cookie']['saltkey'] = random(8);
			dsetcookie('saltkey', $this->var['cookie']['saltkey'], 86400 * 30, 1, 1);
		}
		$this->var['authkey'] = md5($this->var['config']['security']['authkey'].$this->var['cookie']['saltkey']);
	}

	function _init_config() {

		$_config = array();
		@include DISCUZ_ROOT.'./config/config_global.php';
		if(empty($_config)) {
			if(!file_exists(DISCUZ_ROOT.'./data/install.lock')) {
				header('location: install');
				exit;
			} else {
				system_error('config_notfound');
			}
		}

		if(empty($_config['security']['authkey'])) {
			$_config['security']['authkey'] = md5($_config['cookie']['cookiepre'].$_config['db'][1]['dbname']);
		}

		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);
		}

		define('STATICURL', !empty($_config['output']['staticurl']) ? $_config['output']['staticurl'] : 'static/');
		$this->var['staticurl'] = STATICURL;

		$this->config = & $_config;
		$this->var['config'] = & $_config;

		if(substr($_config['cookie']['cookiepath'], 0, 1) != '/') {
			$this->var['config']['cookie']['cookiepath'] = '/'.$this->var['config']['cookie']['cookiepath'];
		}
		$this->var['config']['cookie']['cookiepre'] = $this->var['config']['cookie']['cookiepre'].substr(md5($this->var['config']['cookie']['cookiepath'].'|'.$this->var['config']['cookie']['cookiedomain']), 0, 4).'_';

	}

	function _init_output() {

		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')) && !defined('DISABLEDEFENSE'))) {
			require_once libfile('misc/security', 'include');
		}

		if(!empty($_SERVER['HTTP_ACCEPT_ENCODING']) && strpos($_SERVER['HTTP_ACCEPT_ENCODING'], 'gzip') === false) {
			$this->config['output']['gzip'] = false;
		}

		$allowgzip = $this->config['output']['gzip'] && empty($this->var['inajax']) && $this->var['mod'] != 'attachment' && EXT_OBGZIP;
		setglobal('gzipcompress', $allowgzip);
		ob_start($allowgzip ? 'ob_gzhandler' : null);

		setglobal('charset', $this->config['output']['charset']);
		define('CHARSET', $this->config['output']['charset']);
		if($this->config['output']['forceheader']) {
			@header('Content-Type: text/html; charset='.CHARSET);
		}

	}

	function reject_robot() {
		if(IS_ROBOT) {
			exit(header("HTTP/1.1 403 Forbidden"));
		}
	}

	function _xss_check() {
		$temp = strtoupper(urldecode(urldecode($_SERVER['REQUEST_URI'])));
		if(strpos($temp, '<') !== false || strpos($temp, '"') !== false || strpos($temp, 'CONTENT-TRANSFER-ENCODING') !== false) {
			system_error('request_tainting');
		}
		return true;
	}

	function _get_client_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() {
		$class = 'db_mysql';
		if(count(getglobal('config/db/slave'))) {
			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();
	}

	function _init_session() {
		$this->session = new discuz_session();

		if($this->init_session)	{
			$this->session->init($this->var['cookie']['sid'], $this->var['clientip'], $this->var['uid']);
			$this->var['sid'] = $this->session->sid;
			$this->var['session'] = $this->session->var;

			if($this->var['sid'] != $this->var['cookie']['sid']) {
				dsetcookie('sid', $this->var['sid'], 86400);
			}

			if($this->session->isnew) {
				if(ipbanned($this->var['clientip'])) {
					$this->session->set('groupid', 6);
				}
			}

			if($this->session->get('groupid') == 6) {
				$this->var['member']['groupid'] = 6;
				sysmessage('user_banned');
			}

			if($this->var['uid'] && ($this->session->isnew || ($this->session->get('lastactivity') + 600) < TIMESTAMP)) {
				$this->session->set('lastactivity', TIMESTAMP);
				if($this->session->isnew) {
					DB::update('common_member_status', array('lastip' => $this->var['clientip'], 'lastvisit' => TIMESTAMP), "uid='".$this->var['uid']."'");
				}
			}

		}
	}

	function _init_user() {
		if($this->init_user) {
			if($auth = getglobal('auth', 'cookie')) {
				$auth = daddslashes(explode("\t", authcode($auth, 'DECODE')));
			}
			list($discuz_pw, $discuz_uid) = empty($auth) || count($auth) < 2 ? array('', '') : $auth;

			if($discuz_uid) {
				$user = getuserbyuid($discuz_uid);
			}

			if(!empty($user) && $user['password'] == $discuz_pw) {
				$this->var['member'] = $user;
			} else {
				$user = array();
				$this->_init_guest();
			}

			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');
			}

			$this->cachelist[] = 'usergroup_'.$this->var['member']['groupid'];
			if($user && $user['adminid'] > 0 && $user['groupid'] != $user['adminid']) {
				$this->cachelist[] = 'admingroup_'.$this->var['member']['adminid'];
			}

		} else {
			$this->_init_guest();
		}

		if(empty($this->var['cookie']['lastvisit'])) {
			$this->var['member']['lastvisit'] = TIMESTAMP - 3600;
			dsetcookie('lastvisit', TIMESTAMP - 3600, 86400 * 30);
		} else {
			$this->var['member']['lastvisit'] = $this->var['cookie']['lastvisit'];
		}
		setglobal('uid', getglobal('uid', 'member'));
		setglobal('username', addslashes(getglobal('username', 'member')));
		setglobal('adminid', getglobal('adminid', 'member'));
		setglobal('groupid', getglobal('groupid', 'member'));
	}

	function _init_guest() {
		setglobal('member', array( 'uid' => 0, 'username' => '', 'adminid' => 0, 'groupid' => 7, 'credits' => 0, 'timeoffset' => 9999));
	}

	function _init_cron() {
		$ext = empty($this->config['remote']['on']) || empty($this->config['remote']['cron']) || APPTYPEID == 200;
		if($this->init_cron && $this->init_setting && $ext) {
			if($this->var['cache']['cronnextrun'] <= TIMESTAMP) {
				require_once libfile('class/cron');
				discuz_cron::run();
			}
		}
	}

	function _init_misc() {
		if(!$this->init_misc) {
			return false;
		}
		lang('core');

		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'];
			}
		}

		$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();
		define('FORMHASH', $this->var['formhash']);

		if($this->init_user) {
			if($this->var['group'] && isset($this->var['group']['allowvisit']) && !$this->var['group']['allowvisit']) {
				if($this->var['uid']) {
					sysmessage('user_banned', null);
				} elseif((!defined('ALLOWGUEST') || !ALLOWGUEST) && !in_array(CURSCRIPT, array('member', 'api')) && !$this->var['inajax']) {
					dheader('location: member.php?mod=logging&action=login&referer='.rawurlencode($this->var['siteurl'].$this->var['basefilename'].($_SERVER['QUERY_STRING'] ? '?'.$_SERVER['QUERY_STRING'] : '')));
				}
			}
			if($this->var['member']['status'] == -1) {
				sysmessage('user_banned', null);
			}
		}

		if($this->var['setting']['ipaccess'] && !ipaccess($this->var['clientip'], $this->var['setting']['ipaccess'])) {
			sysmessage('user_banned', null);
		}

		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(':', '&#58;', $closedreason);
				showmessage($closedreason ? $closedreason : 'board_closed', NULL, array('adminemail' => $this->var['setting']['adminemail']), array('login' => 1));
			}
		}

		if(CURSCRIPT != 'admin' && !(in_array($this->var['mod'], array('logging', 'seccode')))) {
			periodscheck('visitbanperiods');
		}

		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;
		}

		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");
		}

		if($this->session->isnew && $this->var['uid']) {
			updatecreditbyaction('daylogin', $this->var['uid']);

			include_once libfile('function/stat');
			updatestat('login', 1);
			if(defined('IN_MOBILE')) {
				updatestat('mobilelogin', 1);
			}
			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']));

		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] : '';
		$this->var['seodescription'] = !empty($this->var['setting']['seodescription'][CURSCRIPT]) ? $this->var['setting']['seodescription'][CURSCRIPT] : '';

	}

	function _init_setting() {
		if($this->init_setting) {
			if(empty($this->var['setting'])) {
				$this->cachelist[] = 'setting';
			}

			if(empty($this->var['style'])) {
				$this->cachelist[] = 'style_default';
			}

			if(!isset($this->var['cache']['cronnextrun'])) {
				$this->cachelist[] = 'cronnextrun';
			}
		}

		!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() {
		$styleid = !empty($this->var['cookie']['styleid']) ? $this->var['cookie']['styleid'] : 0;
		if(intval(!empty($this->var['forum']['styleid']))) {
			$this->var['cache']['style_default']['styleid'] = $styleid = $this->var['forum']['styleid'];
		} elseif(intval(!empty($this->var['category']['styleid']))) {
			$this->var['cache']['style_default']['styleid'] = $styleid = $this->var['category']['styleid'];
		}

		$styleid = intval($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];
			}
		}

		define('IMGDIR', $this->var['style']['imgdir']);
		define('STYLEID', $this->var['style']['styleid']);
		define('VERHASH', $this->var['style']['verhash']);
		define('TPLDIR', $this->var['style']['tpldir']);
		define('TEMPLATEID', $this->var['style']['templateid']);
	}

	function _init_memory() {
		$this->mem = new discuz_memory();
		if($this->init_memory) {
			$this->mem->init($this->config['memory']);
		}
		$this->var['memory'] = $this->mem->type;
	}

	function _init_mobile() {
		if(!$this->var['setting'] || !$this->init_mobile || !$this->var['setting']['mobile']['allowmobile'] || !is_array($this->var['setting']['mobile']) || IS_ROBOT) {
			$nomobile = true;
			$unallowmobile = true;
		}

		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()) {
			$nomobile = true;
		}

		if($this->var['setting']['mobile']['mobilepreview'] && !$this->var['mobile'] && !$unallowmobile) {
			if($_GET['mobile'] === 'yes') {
				dheader("Location:misc.php?mod=mobile");
			}
		}

		if($nomobile || (!$this->var['setting']['mobile']['mobileforward'] && $_GET['mobile'] !== 'yes')) {
			if($_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);

		$arr = array(strstr($_SERVER['QUERY_STRING'], '&simpletype'), strstr($_SERVER['QUERY_STRING'], 'simpletype'), '&mobile=yes', 'mobile=yes');
		$query_sting_tmp = str_replace($arr, '', $_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.'&' : '?').'mobile=yes&simpletype=no';
		$this->var['setting']['mobile']['simpletypeurl'][1] =  $this->var['siteurl'].$this->var['basefilename'].($query_sting_tmp ? '?'.$query_sting_tmp.'&' : '?').'mobile=yes&simpletype=yes';
		unset($query_sting_tmp);
		ob_start();
	}

	function timezone_set($timeoffset = 0) {
		if(function_exists('date_default_timezone_set')) {
			@date_default_timezone_set('Etc/GMT'.($timeoffset > 0 ? '-' : '+').(abs($timeoffset)));
		}
	}

	function mobile_iconv_recurrence($value) {
		if(is_array($value)) {
			foreach($value AS $key => $val) {
				$value[$key] = $this->mobile_iconv_recurrence($val);
			}
		} else {
			$value = addslashes(diconv(stripslashes($value), 'utf-8', CHARSET));
		}
		return $value;
	}
}

class db_mysql
{
	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
{

	function table($table) {
		return DB::_execute('table_name', $table);
	}

	function delete($table, $condition, $limit = 0, $unbuffered = true) {
		if(empty($condition)) {
			$where = '1';
		} elseif(is_array($condition)) {
			$where = DB::implode_field_value($condition, ' AND ');
		} else {
			$where = $condition;
		}
		$sql = "DELETE FROM ".DB::table($table)." WHERE $where ".($limit ? "LIMIT $limit" : '');
		return DB::query($sql, ($unbuffered ? 'UNBUFFERED' : ''));
	}

	function insert($table, $data, $return_insert_id = false, $replace = false, $silent = false) {

		$sql = DB::implode_field_value($data);

		$cmd = $replace ? 'REPLACE INTO' : 'INSERT INTO';

		$table = DB::table($table);
		$silent = $silent ? 'SILENT' : '';

		$return = DB::query("$cmd $table SET $sql", $silent);

		return $return_insert_id ? DB::insert_id() : $return;

	}

	function update($table, $data, $condition, $unbuffered = false, $low_priority = false) {
		$sql = DB::implode_field_value($data);
		$cmd = "UPDATE ".($low_priority ? 'LOW_PRIORITY' : '');
		$table = DB::table($table);
		$where = '';
		if(empty($condition)) {
			$where = '1';
		} elseif(is_array($condition)) {
			$where = DB::implode_field_value($condition, ' AND ');
		} else {
			$where = $condition;
		}
		$res = DB::query("$cmd $table SET $sql WHERE $where", $unbuffered ? 'UNBUFFERED' : '');
		return $res;
	}

	function implode_field_value($array, $glue = ',') {
		$sql = $comma = '';
		foreach ($array as $k => $v) {
			$sql .= $comma."`$k`='$v'";
			$comma = $glue;
		}
		return $sql;
	}

	function insert_id() {
		return DB::_execute('insert_id');
	}

	function fetch($resourceid, $type = MYSQL_ASSOC) {
		return DB::_execute('fetch_array', $resourceid, $type);
	}

	function fetch_first($sql) {
		DB::checkquery($sql);
		return DB::_execute('fetch_first', $sql);
	}

	function result($resourceid, $row = 0) {
		return DB::_execute('result', $resourceid, $row);
	}

	function result_first($sql) {
		DB::checkquery($sql);
		return DB::_execute('result_first', $sql);
	}

	function query($sql, $type = '') {
		DB::checkquery($sql);
		return DB::_execute('query', $sql, $type);
	}

	function num_rows($resourceid) {
		return DB::_execute('num_rows', $resourceid);
	}

	function affected_rows() {
		return DB::_execute('affected_rows');
	}

	function free_result($query) {
		return DB::_execute('free_result', $query);
	}

	function error() {
		return DB::_execute('error');
	}

	function errno() {
		return DB::_execute('errno');
	}

	function _execute($cmd , $arg1 = '', $arg2 = '') {
		static $db;
		if(empty($db)) $db = & DB::object();
		$res = $db->$cmd($arg1, $arg2);
		return $res;
	}

	function &object($dbclass = 'db_mysql') {
		static $db;
		if(empty($db)) $db = new $dbclass();
		return $db;
	}

	function checkquery($sql) {
		static $status = null, $checkcmd = array('SEL'=>1, 'UPD'=>1, 'INS'=>1, 'REP'=>1, 'DEL'=>1);
		if($status === null) $status = getglobal('config/security/querysafe/status');
		if($status) {
			$test = 1;
			$cmd = strtoupper(substr(trim($sql), 0, 3));
			if(isset($checkcmd[$cmd])) {
				$test = DB::_do_query_safe($sql);
			} elseif(substr($cmd, 0, 2) === '/*') {
				$test = -1;
			}
			if($test < 1) DB::_execute('halt', 'security_error', $sql);
		}
		return true;
	}

	function _do_query_safe($sql) {
		static $_CONFIG = null;
		if($_CONFIG === null) {
			$_CONFIG = getglobal('config/security/querysafe');
		}

		$sql = str_replace(array('\\\\', '\\\'', '\\"', '\'\''), '', $sql);
		$mark = $clean = '';
		if(strpos($sql, '/') === false && strpos($sql, '#') === false && strpos($sql, '-- ') === false) {
			$clean = preg_replace("/'(.+?)'/s", '', $sql);
		} else {
			$len = strlen($sql);
			$mark = $clean = '';
			for ($i = 0; $i <$len; $i++) {
				$str = $sql[$i];
				switch ($str) {
					case '\'':
						if(!$mark) {
							$mark = '\'';
							$clean .= $str;
						} elseif ($mark == '\'') {
							$mark = '';
						}
						break;
					case '/':
						if(empty($mark) && $sql[$i+1] == '*') {
							$mark = '/*';
							$clean .= $mark;
							$i++;
						} elseif($mark == '/*' && $sql[$i -1] == '*') {
							$mark = '';
							$clean .= '*';
						}
						break;
					case '#':
						if(empty($mark)) {
							$mark = $str;
							$clean .= $str;
						}
						break;
					case "\n":
						if($mark == '#' || $mark == '--') {
							$mark = '';
						}
						break;
					case '-':
						if(empty($mark)&& substr($sql, $i, 3) == '-- ') {
							$mark = '-- ';
							$clean .= $mark;
						}
						break;

					default:

						break;
				}
				$clean .= $mark ? '' : $str;
			}
		}

		$clean = preg_replace("/[^a-z0-9_\-\(\)#\*\/\"]+/is", "", strtolower($clean));

		if($_CONFIG['afullnote']) {
			$clean = str_replace('/**/','',$clean);
		}

		if(is_array($_CONFIG['dfunction'])) {
			foreach($_CONFIG['dfunction'] as $fun) {
				if(strpos($clean, $fun.'(') !== false) return '-1';
			}
		}

		if(is_array($_CONFIG['daction'])) {
			foreach($_CONFIG['daction'] as $action) {
				if(strpos($clean,$action) !== false) return '-3';
			}
		}

		if($_CONFIG['dlikehex'] && strpos($clean, 'like0x')) {
			return '-2';
		}

		if(is_array($_CONFIG['dnote'])) {
			foreach($_CONFIG['dnote'] as $note) {
				if(strpos($clean,$note) !== false) return '-4';
			}
		}

		return 1;

	}

}

class discuz_session {

	var $sid = null;
	var $var;
	var $isnew = false;
	var $newguest = array('sid' => 0, 'ip1' => 0, 'ip2' => 0, 'ip3' => 0, 'ip4' => 0,
	'uid' => 0, 'username' => '', 'groupid' => 7, 'invisible' => 0, 'action' => 0,
	'lastactivity' => 0, 'fid' => 0, 'tid' => 0, 'lastolupdate' => 0);

	var $old =  array('sid' =>  '', 'ip' =>  '', 'uid' =>  0);

	function discuz_session($sid = '', $ip = '', $uid = 0) {
		$this->old = array('sid' =>  $sid, 'ip' =>  $ip, 'uid' =>  $uid);
		$this->var = $this->newguest;
		if(!empty($ip)) {
			$this->init($sid, $ip, $uid);
		}
	}

	function set($key, $value) {
		if(isset($this->newguest[$key])) {
			$this->var[$key] = $value;
		} elseif ($key == 'ip') {
			$ips = explode('.', $value);
			$this->set('ip1', $ips[0]);
			$this->set('ip2', $ips[1]);
			$this->set('ip3', $ips[2]);
			$this->set('ip4', $ips[3]);
		}
	}

	function get($key) {
		if(isset($this->newguest[$key])) {
			return $this->var[$key];
		} elseif ($key == 'ip') {
			return $this->get('ip1').'.'.$this->get('ip2').'.'.$this->get('ip3').'.'.$this->get('ip4');
		}
	}

	function init($sid, $ip, $uid) {
		$this->old = array('sid' =>  $sid, 'ip' =>  $ip, 'uid' =>  $uid);
		$session = array();
		if($sid) {
			$session = DB::fetch_first("SELECT * FROM ".DB::table('common_session').
				" WHERE sid='$sid' AND CONCAT_WS('.', ip1,ip2,ip3,ip4)='$ip'");
		}

		if(empty($session) || $session['uid'] != $uid) {
			$session = $this->create($ip, $uid);
		}

		$this->var = $session;
		$this->sid = $session['sid'];
	}

	function create($ip, $uid) {

		$this->isnew = true;
		$this->var = $this->newguest;
		$this->set('sid', random(6));
		$this->set('uid', $uid);
		$this->set('ip', $ip);
		$uid && $this->set('invisible', getuserprofile('invisible'));
		$this->set('lastactivity', time());
		$this->sid = $this->var['sid'];

		return $this->var;
	}

	function delete() {

		global $_G;
		$onlinehold = $_G['setting']['onlinehold'];
		$guestspan = 60;

		$onlinehold = time() - $onlinehold;
		$guestspan = time() - $guestspan;

		$condition = " sid='{$this->sid}' ";
		$condition .= " OR lastactivity<$onlinehold ";
		$condition .= " OR (uid='0' AND ip1='{$this->var['ip1']}' AND ip2='{$this->var['ip2']}' AND ip3='{$this->var['ip3']}' AND ip4='{$this->var['ip4']}' AND lastactivity>$guestspan) ";
		$condition .= $this->var['uid'] ? " OR (uid='{$this->var['uid']}') " : '';
		DB::delete('common_session', $condition);
	}

	function update() {
		global $_G;
		if($this->sid !== null) {

			$data = daddslashes($this->var);
			if($this->isnew) {
				$this->delete();
				DB::insert('common_session', $data, false, false, true);
			} else {
				DB::update('common_session', $data, "sid='$data[sid]'");
			}
			$_G['session'] = $data;
			dsetcookie('sid', $this->sid, 86400);
		}
	}

	function onlinecount($type = 0) {
		$condition = $type == 1 ? ' WHERE uid>0 ' : ($type == 2 ? ' WHERE invisible=1 ' : '');
		return DB::result_first("SELECT count(*) FROM ".DB::table('common_session').$condition);
	}

}


class discuz_process
{
	function islocked($process, $ttl = 0) {
		$ttl = $ttl < 1 ? 600 : intval($ttl);
		if(discuz_process::_status('get', $process)) {
			return true;
		} else {
			return discuz_process::_find($process, $ttl);
		}
	}

	function unlock($process) {
		discuz_process::_status('rm', $process);
		discuz_process::_cmd('rm', $process);
	}

	function _status($action, $process) {
		static $plist = array();
		switch ($action) {
			case 'set' : $plist[$process] = true; break;
			case 'get' : return !empty($plist[$process]); break;
			case 'rm' : $plist[$process] = null; break;
			case 'clear' : $plist = array(); break;
		}
		return true;
	}

	function _find($name, $ttl) {

		if(!discuz_process::_cmd('get', $name)) {
			discuz_process::_cmd('set', $name, $ttl);
			$ret = false;
		} else {
			$ret = true;
		}
		discuz_process::_status('set', $name);
		return $ret;
	}

	function _cmd($cmd, $name, $ttl = 0) {
		static $allowmem;
		if($allowmem === null) {
			$allowmem = memory('check') == 'memcache';
		}
		if($allowmem) {
			return discuz_process::_process_cmd_memory($cmd, $name, $ttl);
		} else {
			return discuz_process::_process_cmd_db($cmd, $name, $ttl);
		}
	}

	function _process_cmd_memory($cmd, $name, $ttl = 0) {
		return memory($cmd, 'process_lock_'.$name, time(), $ttl);
	}

	function _process_cmd_db($cmd, $name, $ttl = 0) {
		$ret = '';
		switch ($cmd) {
			case 'set':
				$ret = DB::insert('common_process', array('processid' => $name, 'expiry' => time() + $ttl), false, true);
				break;
			case 'get':
				$ret = DB::fetch_first("SELECT * FROM ".DB::table('common_process')." WHERE processid='$name'");
				if(empty($ret) || $ret['expiry'] < time()) {
					$ret = false;
				} else {
					$ret = true;
				}
				break;
			case 'rm':
				$ret = DB::delete('common_process', "processid='$name' OR expiry<".time());
				break;
		}
		return $ret;
	}
}

class discuz_memory
{
	var $config;
	var $extension = array();
	var $memory;
	var $prefix;
	var $type;
	var $keys;
	var $enable = false;

	function discuz_memory() {
		$this->extension['eaccelerator'] = function_exists('eaccelerator_get');
		$this->extension['apc'] = function_exists('apc_fetch');
		$this->extension['xcache'] = function_exists('xcache_get');
		$this->extension['memcache'] = extension_loaded('memcache');
	}

	function init($config) {

		$this->config = $config;
		$this->prefix = empty($config['prefix']) ? substr(md5($_SERVER['HTTP_HOST']), 0, 6).'_' : $config['prefix'];
		$this->keys = array();

		if($this->extension['memcache'] && !empty($config['memcache']['server'])) {
			require_once libfile('class/memcache');
			$this->memory = new discuz_memcache();
			$this->memory->init($this->config['memcache']);
			if(!$this->memory->enable) {
				$this->memory = null;
			}
		}

		if(!is_object($this->memory) && $this->extension['eaccelerator'] && $this->config['eaccelerator']) {
			require_once libfile('class/eaccelerator');
			$this->memory = new discuz_eaccelerator();
			$this->memory->init(null);
		}

		if(!is_object($this->memory) && $this->extension['xcache'] && $this->config['xcache']) {
			require_once libfile('class/xcache');
			$this->memory = new discuz_xcache();
			$this->memory->init(null);
		}

		if(!is_object($this->memory) && $this->extension['apc'] && $this->config['apc']) {
			require_once libfile('class/apc');
			$this->memory = new discuz_apc();
			$this->memory->init(null);
		}

		if(is_object($this->memory)) {
			$this->enable = true;
			$this->type = str_replace('discuz_', '', get_class($this->memory));
			$this->keys = $this->get('memory_system_keys');
			$this->keys = !is_array($this->keys) ? array() : $this->keys;
		}

	}

	function get($key) {
		$ret = null;
		if($this->enable) {
			$ret = $this->memory->get($this->_key($key));
			if(!is_array($ret)) {
				$ret = null;
				if(array_key_exists($key, $this->keys)) {
					unset($this->keys[$key]);
					$this->memory->set($this->_key('memory_system_keys'), array($this->keys));
				}
			} else {
				return $ret[0];
			}
		}
		return $ret;
	}

	function set($key, $value, $ttl = 0) {

		$ret = null;
		if($this->enable) {
			$ret = $this->memory->set($this->_key($key), array($value), $ttl);
			if($ret) {
				$this->keys[$key] = true;
				$this->memory->set($this->_key('memory_system_keys'), array($this->keys));
			}
		}
		return $ret;
	}

	function rm($key) {
		$ret = null;
		if($this->enable) {
			$ret = $this->memory->rm($this->_key($key));
			unset($this->keys[$key]);
			$this->memory->set($this->_key('memory_system_keys'), array($this->keys));
		}
		return $ret;
	}

	function clear() {
		if($this->enable && is_array($this->keys)) {
			if(method_exists($this->memory, 'clear')) {
				$this->memory->clear();
			} else {
				$this->keys['memory_system_keys'] = true;
				foreach ($this->keys as $k => $v) {
					$this->memory->rm($this->_key($k));
				}
			}
		}
		$this->keys = array();
		return true;
	}

	function _key($str) {
		return ($this->prefix).$str;
	}

}

?>