Redis multi-database selection function singleton class implemented in PHP (detailed explanation)

This article mainly introduces the singleton class of the Redis multi-library selection function implemented by PHP. It analyzes the singleton mode of PHP to implement the multi-library selection function of the redis database based on the example form. Friends who need it can refer to it

The details are as follows:

Preface

Code

hash = $dbnumber;
    $this->redis = new Redis();
    $this->redis->connect(self::REDISHOSTNAME, self::REDISPORT, self::REDISTIMEOUT);
    $this->redis->auth(self::REDISPASSWORD);
    $this->redis->select($dbnumber);
  }
  private function __clone ()
  {}
  /**
   * 获取类单例
   *
   * @param int $dbnumber
   * @return object
   */
  public static function getRedisInstance ($dbnumber)
  {
    $hash = (int) $dbnumber;
    if (! isset(self::$instance[$hash])) {
      self::$instance[$hash] = new MultiRedisConnect($dbnumber);
    }
    return self::$instance[$hash];
  }
  /**
   * 获取redis的连接实例
   *
   * @return object
   */
  public function getRedisConnect ()
  {
    return $this->redis;
  }
  /**
   * 关闭单例时做清理工作
   */
  public function __destruct ()
  {
    $key = $this->hash;
    self::$instances[$key]->redis->close();
    self::$instances[$key] = null;
  }
}
?>

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