session redis memcache mysql

最新推荐文章于 2024-11-14 14:34:07 发布

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最新推荐文章于 2024-11-14 14:34:07 发布

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本文链接：https://blog.youkuaiyun.com/xiasongchang/article/details/52813642

本文介绍如何使用Redis和Memcache进行缓存操作，并展示了如何通过MySQL实现自定义会话管理。文中提供了PHP代码示例，包括连接配置、数据存取及会话处理等关键步骤。

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1、redis

首先要安装redis服务 开启扩展  在redis根目录F:\redis\redis-2.4.5-win32-win64\32bit用cmd运行redis_server.exe
     //连接本地的 Redis 服务
   $redis = new Redis();
   $redis->connect('127.0.0.1', 6379);
   echo "Connection to server sucessfully";
         //查看服务是否运行
   echo "Server is running: " . $redis->ping();
   //存入redis
   echo $redis->set('a','aaabbbbbbbbbbbbbbbbbb');
   //取出
   echo $redis->get('a');

    //存储多个值  

    $array = array('first_key'=>'first_val',  

              'second_key'=>'second_val',  

              'third_key'=>'third_val');  

    $array_get = array('first_key','second_key','third_key');  

    $redis->mset($array);  

    var_dump($redis->mget($array_get));

2、memcache

<?php
ini_set("session.save_handler", "memcache");
ini_set("session.save_path", "127.0.0.1:11211");

//测试session读取是否正常   2 3 6 9 行是最重要的
session_start();
//$_SESSION['username'] = "1222";
//echo session_id();
echo $_SESSION['username'];

//从Memcache中读取session
$m = new Memcache();
$m->connect('localhost', 11211);



//或者这样
//$mem->addServer("127.0.0.1", 11211) or die ("Can't add Memcache server 127.0.0.1:12000");

//根据session_id获取数据

//本机
//$session = $m->get(session_id()); //session_id：d527b6f983bd5e941f9fff318a31206b

//另一台服务器，已知session id
//$session = $m->get("jk51p6mccprn886vlgacjrh9u2");

//echo $session."<br/>"; //会得到这样的数据：username|s:16:"pandao";，解析一下就可以得到相应的值了
//echo session_id()."<br/>";
exit;

?>

3、mysql

<?php  
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(){    
    @$link = mysql_connect('localhost', 'root', 'root');    
    mysql_query('set names utf8');    
    mysql_query('use yii');    
}    
function close(){    
    mysql_close();    
}    
function read($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){    
    $sql = "insert into `session` (session_id,session_data,session_time) values('$sess_id','$sess_data', now()) on duplicate key update session_data = '$sess_data' , session_time = now()";  //这是为了gc()    
    return 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_get("session.gc_maxlifetime");    
    echo __FUNCTION__;    
    $sql = "delete from `session` where now()-session_time > '$maxlifetime' ";    
    return mysql_query($sql);    
}    
header("content-type:text/html;charset=utf8");    
session_start();    
$_SESSION['name']='aabbcc';
$_SESSION['sex']='yyyuuu';   
//echo session_id();    
echo $_SESSION['sex'];