<?php
/**
* Created by PhpStorm.
* User: user
* Date: 2016/11/3 0003
* Time: 下午 8:12
*/
ini_set("session.save_handler","user");
//session.gc_probability = 1 分子
//ini_set("session.gc_probability",1);
//session.gc_divisor = 1000 分母
//ini_set("session.gc_divisor",2);
//session.gc_maxlifetime = 1440 垃圾回收时间,session有效期
session_set_save_handler( "open","close","read","write","destroy","gc" );
//连接数据库
function open(){
@$link = mysql_connect('127.0.0.1', 'root', 'root');
mysql_query('set names utf8');
mysql_query('use cms');
}
function close(){
mysql_close();
}
function read($sess_id){
$sql = "select session_data from `session` where session_id = '$sess_id'";
$result = mysql_query($sql);
if($rows = mysql_fetch_assoc($result)){
return $rows['session_data']; }
else{
return '';
}
}
function write($sess_id,$sess_data){
// 讲session存入数据库
$read = mysql_query("select * from session where session_data='{$sess_data}'");
$info = mysql_fetch_assoc($read);
// var_dump($info);die;
if (empty($info)) {
$sql1="delete from session where session_data != '{$sess_data}'";
mysql_query($sql1);
$time = time();
mysql_query("insert into session (session_id, session_data, session_time) values ('{$sess_id}', '{$sess_data}', '{$time}')");
} else {
$sql1="delete from session where session_data != '{$sess_data}'";
mysql_query($sql1);
$sql = "update session set session_id='{$sess_id}',session_time=now() where session_data='{$sess_data}'";
mysql_query($sql);
}
}
function destroy($sess_id){
echo __FUNCTION__;
$sql = "delete from `session` where session_id = '$sess_id'";
return mysql_query($sql);
}
function gc($sess_id){
$maxlifetime = ini_set("session.gc_maxlifetime");
echo __FUNCTION__;
$sql = "delete from `session` where now()-session_time > '$maxlifetime' ";
return mysql_query($sql);
}
if (!empty($_POST['name'])) {
$name = $_POST['name'];
session_start();
$_SESSION['name'] = "$name";
}