redis如何取代php實作檔案儲存session的實例

redis 替代php檔案儲存session的實例

在查看實例之前請先了解   PHP session_set_save_handler#函數的用法

定義個SessionManager  類別

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();
  }
}

建立一個session_set.php 程式碼如下

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

建立一個session_set.php 程式碼如下

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

測試輸出結果  xxdcsnd@sina.com

注意：php.ini session.save-hadler 設定為user ，否則session_set_save_handler 不會生效

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