深入浅出: 如何使用CI配置Redis（ci配置redis）

部署运行环境：

在运行redis之前，我们必须先安装python：

sudo apt update
sudo apt install python3

安装依赖库：requests，json，redis

pip install requests 
pip install json
pip install redis

让我们开始使用Codeigniter配置Redis，首先我们为Codeigniter项目创建一个config.php文件：

$config['redis_host'] = 'localhost';
$config['redis_port'] = 6379;
$config['redis_auth'] = 'password';

接下来我们可以打开Codeigniter文件夹，查找Application/config/autoload.php文件，在Helper文件中，然后在$autoload[‘libraries’]数组中添加session库：

$autoload['libraries'] = array('session');

现在可以在Application/config/config.php中载入Redis作为Session驱动程序：

$config['sess_driver'] = 'redis';
$config['sess_save_path'] = 'tcp://'.$config['redis_host'].':'.$config['redis_port'].'/';
$config['sess_match_ip'] = FALSE;
$config['sess_time_to_update'] = 3600;
$config['sess_expiration'] = 7200;

最后，在应用程序目录中创建libraries/Redis_lib.php文件：

 
class Redis_lib
{
   private $redis;
 
   // ------------------------------------------------------------------------
 
   public function __construct()
   {
      //include config options
      $CI =& get_instance();
      $CI->config->load('config',TRUE);
 
      //setup redis client
      $this->redis = new Redis();
      $this->redis->connect($CI->config->item('redis_host'), 
                            $CI->config->item('redis_port'));
   }
 
   // ------------------------------------------------------------------------
 
   public function set($key,$value,$expiration=FALSE)
   {
      if($expiration)
          $this->redis->setex($key,$expiration,$value);
      else 
          $this->redis->set($key,$value);
      return TRUE;     
   }
 
   // ------------------------------------------------------------------------
 
   public function get($key)
   {
      //get the current value
      $value = $this->redis->get($key);
      //check if we have any data
      if($value)
          return $value;
 
      return FALSE;
   }
 
   // ------------------------------------------------------------------------
 
   public function delete($key)
   {
      //delete the current key
      $this->redis->delete($key);
      return TRUE;
   }
 
   // ------------------------------------------------------------------------
 
   /*  
      Here will be your other methods to 
      work with redis such as increment, decrement, keys, etc
   */
 
   // ------------------------------------------------------------------------
 
 
   public function __destruct()
   {
      //close connection
      $this->redis->close();
   }
 
}
 
/* End of file Redis_lib.php */
/* Location: ./application/libraries/Redis_lib.php */

通过上面的步骤，我们已经学习了如何在Codeigniter中配置Redis，以便使用它来存储会话数据，这是一个实现高性能的便捷方法。