将会话id存储在codeigniter的另一个表中

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class MY_Session extends CI_Session_driver {

    protected $_session_table;

    public function __construct(&$params)
    {
        parent::__construct($params);

        // 设置会话表名
        $this->_session_table = 'your_session_table';
    }

    public function read($session_id)
    {
        // 从自定义会话表中读取会话数据
        $query = $this->CI->db->get_where($this->_session_table, array('session_id' => $session_id));

        if ($query->num_rows() === 1)
        {
            $row = $query->row();
            return $row->session_data;
        }

        return '';
    }

    public function write($session_id, $session_data)
    {
        // 将会话数据写入自定义会话表
        $this->CI->db->replace($this->_session_table, array('session_id' => $session_id, 'session_data' => $session_data));
        return true;
    }

    public function destroy($session_id)
    {
        // 从自定义会话表中删除会话数据
        $this->CI->db->delete($this->_session_table, array('session_id' => $session_id));
        return true;
    }
}

$config['sess_driver'] = 'files';

$config['sess_driver'] = 'MY_Session';