The classic singleton implementation. PHP example

class Cookie{
	public static int $baseTime = 86400 * 7;
	public static string $basePath = '/';
	protected static $instance;

//set protected for our constructor. This will not allow instances of our class to be created!
	protected function __construct(){}

// write a method that will create an instance of our class
// before creating a new object, check whether another class object has already been created
	public static function getInstance() : self{
		if(self::$instance === null){
			self::$instance = new self();
		}

		return self::$instance;
	}

	public function get(string $name) : ?string{
		return $_COOKIE[$name] ?? null;
	}