<?php
class SessionManager{
 private $redis;
 private $sessionSavePath;
 private $sessionName;
 private $sessionExpireTime=30;//redis，session的過(guò)期時(shí)間為30s
 public function __construct(){
 $this->redis = new Redis();//創(chuàng)建phpredis實(shí)例
 $this->redis->connect('127.0.0.1',6379);//連接redis
 $this->redis->auth("107lab");//授權(quán)
 $retval = session_set_save_handler(
  array($this,"open"),
  array($this,"close"),
  array($this,"read"),
  array($this,"write"),
  array($this,"destroy"),
  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);//獲取redis中的指定記錄
 if($value){
  return $value;
 }else{
  return '';
 }
 }
 public function write($id,$data){
 if($this->redis->set($id,$data)){//以session ID為鍵，存儲(chǔ)
  $this->redis->expire($id,$this->sessionExpireTime);//設(shè)置redis中數(shù)據(jù)的過(guò)期時(shí)間，即session的過(guò)期時(shí)間
  return true;
 }
 return false;
 }
 public function destroy($id){
 if($this->redis->delete($id)){//刪除redis中的指定記錄
  return true;
 }
 return false;
 }
 public function gc($maxlifetime){
 return true;
 }
 public function __destruct(){
 session_write_close();
 }
}

<?php
 include('SessionManager.php');
 new SessionManager();
 $_SESSION['username'] = 'captain';

<?php
 include('SessionManager.php');
 new SessionManager();
 echo $_SESSION['username'];

127.0.0.1:6379> keys *
1) "oe94eic337slnjv1bvlreoa574"
127.0.0.1:6379> get oe94eic337slnjv1bvlreoa574
"username|s:7:\"captain\";"