<?php
header('Content-type:text/html;charset=gbk;');
date_default_timezone_set('PRC');
class db{
private $conn=null;
public function __construct($dsn,$user,$password){
try{
$this->conn = new PDO($dsn, $user, $password);
}catch(PDOException $e){
echo $e->getMessage();
trigger_error('stopped',E_USER_ERROR);
}
}
public function query($session_id){
$sth=$this->conn->prepare('select session_id,session_data from session where session_id=? limit 1');
$sth->execute(array($session_id));
$result=$sth->fetch(PDO::FETCH_ASSOC);
return $result['session_data'];
}
public function insert($session_id,$session_data){
$sth=$this->conn->prepare('replace into session values(null,?,?,?)');
$sth->execute(array($session_id,date('Y-m-d H:i:s'),$session_data));
return true;
}
public function delete($where,$type=1){
if($type==1){
$sth=$this->conn->prepare('delete from session where session_id=?');
$sth->execute(array($where));
}elseif($type==2){
$sth=$this->conn->prepare('delete from session where session_date<?');
$sth->execute(array($where));
}
return true;
}
}
class session_handler{
private $db=null;
public function __construct(db $obj){
$this->db=$obj;
}
public function open($one,$two){
return true;
}
public function close(){
return true;
}
public function read($id){
return (string)$this->db->query($id);
}
public function write($id,$data){
$this->db->insert($id,$data);
return true;
}
public function destroy($id){
$this->db->delete($id);
return true;
}
public function gc($maxlifetime){
$this->db->delete(strtotime("Y-m-d H:i:s",time()-$maxlifetime),2);
return true;
}
}
$handler=new session_handler(new db('mysql:dbname=session;host=192.168.0.2','lwy','lwy'));
session_set_save_handler(
array($handler, 'open'),
array($handler, 'close'),
array($handler, 'read'),
array($handler, 'write'),
array($handler, 'destroy'),
array($handler, 'gc')
);
register_shutdown_function('session_write_close');
session_start();
$_SESSION['aa']='fffffffffeeeeeeeesssssssssssss';
$_SESSION['bb']='fefdsfgfsfsdfsd';
var_dump($_SESSION);
?>
php.ini session.save_handler=files 改为 session.save_handler=user
数据库session
表session
表创建sql：
CREATE TABLE `session` (
`id` int(10) unsigned NOT NULL AUTO_INCREMENT,
`session_id` varchar(100) DEFAULT NULL,
`session_date` timestamp NULL DEFAULT NULL,
`session_data` varchar(1024) DEFAULT NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `session_id` (`session_id`)
)
