About the implementation of multiple Redis classes in ThinkPHP6

composer require predis/predis

'redis' => [
   // 驱动方式
    'type'       => 'redis',
    // 连接地址
    'host'       => Env::get('redis.host'),
    // 端口
    'port'       => Env::get('redis.port'),],

/**
 * 配置参数
 * @var array
 */protected $options = [
    'host'       => '127.0.0.1',
    'port'       => 6379,
    'password'   => '',
    'select'     => 0,
    'timeout'    => 0,
    'expire'     => 0,
    'persistent' => false,
    'prefix'     => '',
    'tag_prefix' => 'tag:',
    'serialize'  => [],];

[REDIS]host = 127.0.0.1
port = 6379

<?phpnamespace app\common;use think\facade\Config;use think\cache\driver\redis as ThinkRedis;class Redis extends ThinkRedis{
    /**
     * @var int
     */
    protected $hash;

    /**
     * @var array
     */
    protected static $instance = [];

    /**
     * Redis constructor.
     * @param $db
     */
    private function __construct($db)
    {
        $options = Config::get(&#39;cache.stores.redis&#39;);
        $options[&#39;select&#39;] = $db;
        $this->hash = $db;
        $this->options = array_merge($this->options, $options);
        parent::__construct();
    }

    private function __clone()
    {
    }

    /**
     * @param int $db
     * @return \Predis\Client|\Redis
     */
    public static function instance($db = 0)
    {
        if (! isset(self::$instance[$db])) {
            self::$instance[$db] = new self($db);
        }

        return self::$instance[$db];
    }

    public function __destruct()
    {
        self::$instance[$this->hash]->close();
        unset(self::$instance[$this->hash]);
    }}

use app\common\Redis;

$redis = Redis::instance(4);
$redis->hSet('user:1', 'userName', 'admin');

Redis::instance(1)->hSet('user', 'name', 'admin1');
Redis::instance(2)->hSet('user', 'name', 'admin2');
Redis::instance(3)->hSet('user', 'name', 'admin3');