class Database { private static $instance; private function __construct() { // connect to database } public static function getInstance() { if(!self::$instance) { self::$instance = new Database(); } return self::$instance; } }
class Logger { private static $instance; private function __construct() { // setup logger } public static function getInstance() { if(!self::$instance) { self::$instance = new Logger(); } return self::$instance; } public function log($message) { // log message } }In this example, the Logger class uses the getInstance pattern to create a single instance of the class that can be used to log messages throughout the application. The log method is called on the instance returned by getInstance to write messages to the log. Based on the examples provided, it is difficult to determine the package library being used. However, it is likely a custom package developed by the author of the code.