$memcached = new Memcache; $memcached->addServer('127.0.0.1', 11211); // You can also add more servers as needed $memcached->addServer('192.168.1.1', 11211);In this example, we create a new instance of the Memcached class and add a server with the IP address '127.0.0.1' and port 11211. We can also add more servers as needed by calling the addServer method again with the new server's IP address and port. Package Library: The addServer method is part of the Memcached extension in PHP. The Memcached extension is a popular package library used for caching frequently accessed data in web applications.