class Member { private $id; private $username; private $password; private $email; public function __construct($id, $username, $password, $email) { $this->id = $id; $this->username = $username; $this->password = $password; $this->email = $email; } public function getId() { return $this->id; } public function getUsername() { return $this->username; } public function getEmail() { return $this->email; } public function setPassword($password) { $this->password = $password; } public function save() { // database logic goes here } }In this example, the Member class has private properties for id, username, password, and email, and getter and setter methods for retrieving and updating those properties. It also has a save() method for persisting member data to a database. The package library for this example is not specified, as it could be a custom class or part of a larger PHP framework or library.