session入库

#存储session的数据表示列结构,可作为参考
#创建数据库(可选)
CREATE DATABASE session;
#使用创建的数据库(可选)
USE session;
#创建存储session的数据表(必须)
CREATE TABLE `session` (
`session_id` varchar(255) NOT NULL,
`session_data` blob,
`session_time` int(11) NOT NULL,
UNIQUE KEY `session_id` (`session_id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;

<?php
//通过重写session机制实现
//session入mysql
class MySessionHandler implements SessionHandlerInterface{
//开启session
public function open($save_path,$save_name){
//连接数据库
mysql_connect('127.0.0.1','root','root');
mysql_query('use session');
mysql_query('set names utf8');
return true;
}
//关闭session
public function close(){
return true;
}
//写session
public function write($session_id,$session_data){
$sql = "insert into session values ('$session_id','$session_data','".time()."')";
// echo $sql;die();
mysql_query($sql);
return true;
}
//读session
public function read($session_id){
$sql = "select * from session where session_id = '$session_id'";
// echo $sql;
$resource = mysql_query($sql);
$row = mysql_fetch_assoc($resource);
if($row['session_data']){
return $row['session_data'];
}else{
//防止没有session报错
return '';
}
}
//销毁session
public function destroy($session_id){
$sql = "delete from session where session_id = '$session_id'";
// echo $sql;die();
mysql_query($sql);
return true;
}
//gc回收机制
public function gc($maxlifetime){

}
}
//重写session机制
$handler = new MySessionHandler();
session_set_save_handler($handler, true);
session_start();
// $_SESSION['name'] = 'ithm555';
// $_SESSION['age'] = '18';
// echo session_id();
// echo '<hr>';
// var_dump($_SESSION['name']);
// var_dump($_SESSION['age']);
// //销毁session
session_destroy();
// echo '<hr>';
var_dump($_SESSION['name']);
var_dump($_SESSION['age']);