PHP实现Session入库/存入redis的方法

//判断PHP版本
 if(version_compare(PHP_VERSION,5.4)==1){
       
   session_set_save_handler($handler, true);
  session_start();
  }else{  
    ini_set('session.use_trans_sid',0);
    ini_set('session.use_cookies',1);
    ini_set('session.cookie_path','/');
      ini_set('session.save_handler','user');
      session_module_name('user');
      session_set_save_handler(array($session,"open"),array($session,"close"),array($session,"read"),array($session,"write"),array($session,"destory"),array($session,"gc"));
      session_start();   
     }
$_SESSION['QQ']="QQ";
echo $_SESSION['QQ'];

数据库代码 db.php

<?php 
class Database{
     static $instance;
    static $db;
  static function getInstance(){   
    if(self::$instance){
      return self::$instance;
    }else{
      return new Database();  
    }
  }
  public function __construct(){
    self::$db = new PDO('mysql:host=localhost;dbname=session', 'root','');
  }
 
    public function getOne($sql){
      $rs =self::$db->query($sql);
      @$rs->setFetchMode(PDO::FETCH_ASSOC);//返回关联数组
      $result = $rs -> fetch();
      return $result;
    }
    public function execute($sql){
       
       
        $rs = self::$db->exec($sql);
        return $rs;
         
    } 
   
 
}
 
 
//$data = Database::getInstance();
//var_dump($data);

使用REDIS 存储SESSION

<?php
class SessionManager{
  private $redis;
  private $sessionSavePath;
  private $sessionName;
  private $sessionExpireTime = 30;
  public function __construct(){
    $this->redis = new Redis();
    $this->redis->connect('127.0.0.1',6379);  //连接redis
    $retval = session_set_save_handler(
      array($this,"open"),
      array($this,"close"),
      array($this,"read"),
      array($this,"write"),
      array($this,"destory"),
      array($this,"gc")
    );
      session_start();
  }
   
    public function open($path,$name){
      return true;
    }
    public function close(){
      return true;
    }
    public function read($id){
      $value = $this->redis->get($id);
      if($value){
        return $value;
      }else{
        return "";
      }
    }
    public function write($id,$data){
      if($this->redis->set($id,$data)){
        $this->redis->expire($id,$this->sessionExpireTime); 
         //设置过期时间
        return true;
      }
      return false;
    }
    public function destory($id){
      if($this->redis->delete($id)){
        return true;
      }
      return false;
    }
    public function gc($maxlifetime){
      return true;
    }
    //析构函数
    public function __destruct(){
      session_write_close();
    }
     
}
 
 
$re = new SessionManager();
$_SESSION['name'] = "qq";
echo $_SESSION['name'];

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