1、session处理和统计结合起来。同时游客也都有记录。
2、完全使用数据库和cookie来模拟session的功能。
3、用户的对session的操作都尽量保证在一条sql语句完成。不用到session的时候，绝对不多一条查询。
4、为了效率起见，session的回收没有集成进来，推荐另外写程序调用。
暂时给出代码，不具体解释。
sql
CREATE TABLE `*****_session` (
`sid` char(32) NOT NULL,
`uid` int(10) NOT NULL,
`username` char(32) NOT NULL,
`usertype` tinyint(1) NOT NULL,
`activetime` int(10) NOT NULL,
`ip` char(15) NOT NULL,
`url` char(80) NOT NULL,
`value` char(255) NOT NULL,
PRIMARY KEY (`sid`)
) ENGINE=MEMORY DEFAULT CHARSET=utf8;
php代码
<?
class session{
private
$_sessionPrex= '';
private
$_time = '';
private
$_model = null;
private
$_expiry = 3600;
private
$_domain = '';
protected
$isNew = 0;//0 更新 1 增加
protected $isGetSession = 0;//0还没有取出session 1 已经取出了
protected $session = array();
public function
__construct($options){
$this->_setOptions($options);
if(empty(
$this->_time))$this->_time = time();
$this->session['activetime'] = $this->_time;
}
public function
start(){
$this->_getSid();
}
public function
set($key,$value){
if(
in_array($key,array('uid','username','usertype','url'))){
$this->session[$key] = $value;
}else{
$other = $this->session['value'];
$other[$key] = $value;
$this->session['value'] = $other;
}
}
public function
get($key){
if(
$this->isGetSession == 0){
//从数据库读取session记录
$this->_getSession();
$this->isGetSession = 1;
}
if(
in_array($key,array('uid','username','usertype','url'))){
return
$this->session[$key];
}else{
if(isset(
$this->session['value'][$key])){
return
$this->session['value'][$key];
}
return
null;
}
}
public function
destroy(){
$this->session['uid'] = 0;
$this->session['username'] = '';
$this->session['usertype'] = '';
$this->session['value'] = array();
}
public function
__destruct(){
$this->_save();
echo
'<br>'.$this->_model->getDb()->getQNum();
}
private function
_save(){
$dbSession = $this->session;
$dbSession['value'] = serialize($dbSession['value']);
if(
strlen($dbSession['value'])>255)$this->_error('session->value is too long!');
if(
$this->isNew == 1){
//增加
$this->_model->insert($dbSession);
}else{
//更新
$sid = $dbSession['sid'];
unset(
$dbSession['sid']);
$this->_model->update($dbSession,'sid=/''.$sid.'/'');
}
}
private function
_getSession(){
$dbSession = $this->_model->detail('sid = /''.$this->session['sid'].'/'');
$dbSession['value'] = unserialize($dbSession['value']);
$this->session = array_merge($dbSession,$this->session);
}
private function
_getSid(){
$sid = strip_tags($_COOKIE[$this->_sessionPrex.'_sid']);
if (
strlen($sid)!=32) {
//new
$sid = md5(time().mt_rand(1000,10000));
$this->_setCookie($this->_sessionPrex.'_sid',$sid);
$this->_setCookie($this->_sessionPrex.'_uid',0);
$this->session = array(
'uid' => 0,
'username' => '',
'usertype' => -1,
'activetime' => $this->_time,
'ip' => $this->_getip(),
'url' => strip_tags($_SERVER['REQUEST_URI']),
'value' => array()
);
$this->isNew = 1;
}
$this->session['sid'] = $sid;
}
private function
_setCookie($name,$value){
if(empty(
$this->_domain)){
setcookie($name,$value,$this->_time + $this->_expiry,'/');
}else{
setcookie($name,$value,$this->_time + $this->_expiry,'/',$this->_domain);
}
}
private function
_getip(){
return
getip();
}
private function
_setOptions($options){
foreach (
$options as $key=>$value){
if(
in_array($key,array('sessionPrex','time','model','expiry','domain'))){
$key = '_'.$key;
$this->$key = $value;
}
}
}
private function
_error($msg){
throw new
Phpbean_Exception($msg);
}
}
?>