redis stores session instances

This article mainly introduces the relevant information about the instance of redis replacing php file to store session. I hope this article can help everyone and let everyone master the method of redis storing session. Friends who need it can refer to it. I hope it can help everyone.

redis replaces the instance of PHP file storage session

Please understand the usage of PHP session_set_save_handler function before viewing the example

Define a SessionManager class

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();
  }
}

Create a session_set.php and the code is as follows

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

Create a session_set.php and the code is as follows

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

Test output result xxdcsnd@sina.com

Note: php.ini session.save- hadler is set to user, otherwise session_set_save_handler will not take effect

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Redis optimization experience summary

Redis implementation in PHP distribution Session method

Summary of usage of Redis function in php

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