How to ping Redis in PHP?

Question

PHP

Just started using Redis. Did a lot of things that are cached. It seems as it should be, there is a key-value in redis, we issue it, or we take it from the database, write it to redis and issue it. I use Predis as a PHP wrapper. But I can’t make the redis part be ignored if there is no redis on the server (it is not yet on the main server, but the code needs to be updated soon).

Predis\Autoloader::register();
    self::$redis = new Predis\Client([
      'scheme' => 'tcp',
      'host' => REDIS_HOST ?: '127.0.0.1',
      'port' => REDIS_PORT ?: '6379',
    ]);
    try {
      self::$redis->ping();
      self::$available = true;
    } catch (\Exception $e) {
      self::$available = false;
    }

I always end up with an error

Fatal error: in C:\OSPanel\domains\gene.com\vendor\predis\predis\src\Connection\AbstractConnection.php on line 155

Just in case, I put everything in my shell to work with it.
Full class here

namespace Superior;

use \Predis as Predis;

class Redis {
  static public $redis;
  static private $available = false;
  
  static public function k($key) {
    if (self::$redis) {
      return self::$redis->get($key);
    }
    return false;
  }
  
  static public function ss($key, $value, $time = 604800) {
    if (self::$redis) {
      self::$redis->set($key, $value);
      self::$redis->expire($key, $time);
    }
  }
  
  static public function SetUp() {
    Predis\Autoloader::register();
    self::$redis = new Predis\Client([
      'scheme' => 'tcp',
      'host' => REDIS_HOST ?: '127.0.0.1',
      'port' => REDIS_PORT ?: '6379',
    ]);
    try {
      self::$redis->ping();
      self::$available = true;
    } catch (\Exception $e) {
      self::$available = false;
    }
  }
}