redis 替代php文件存储session的实例

小灰灰 2021-11-02 11:26 270阅读 0赞

redis 替代php文件存储session的实例  
查看实例之前请先了解 PHP session\_set\_save\_handler函数的用法  
定义个SessionManager 类

class SessionManager {
      private $redis;
      public function __construct(){
        $this->redis = new Redis();
        $this->redis->connect('192.168.0.102', 6379);
        $retval =session_set_save_handler(
          array($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){
        $session_value = $this->redis->get($id);
        if($session_value){
          return $session_value;
        }else{
          return "";
        }
      }
      public function write($id,$data){
        if($this->redis->set($id,$data)){
          return true;
        }else{
          return false;
        }
      }
      public function destroy($id){
        if($this->redis->delete($id)){
          return true;
        }else{
          return false;
        }
      }
      public function gc($maxlifetime){
        return true;
      }
      public function __destruct(){
        session_write_close();
      }
    }

创建一个session\_set.php 代码如下

include("SessionManager.php");
    new SessionManager();
    $_SESSION['user_name']="xxdcsnd@sina.com";

创建一个session\_set.php 代码如下

include("SessionManager.php");
    new SessionManager();
    echo $_SESSION['user_name'];

测试输出 结果 [xxdcsnd@sina.com][xxdcsnd_sina.com]  
注意 ：php.ini session.save-hadler 设置为 user ，否则session\_set\_save\_handler 不会生效

![在这里插入图片描述][aHR0cHM6Ly9vc2NpbWcub3NjaGluYS5uZXQvb3NjbmV0LzZmZThkNGE3YzMwMjBjMGFjYmU2ZTQxNDI3NWE4MTYyNDEwLmpwZw]

[xxdcsnd_sina.com]: mailto:xxdcsnd@sina.com
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