Our User model, version 2.0. From the article: PDO for Elegant PHP Database Access, http://www.modernphpbook.com/articles/pdo-for-elegant-php-database-access - Fig 11

User.php

<?php 

class User
{
    public $id;
    public $username;
    public $firstname;
    public $lastname;
    public $email;

    public function __construct($data = null)
    {
        if (is_array($data)) {
            if (isset($data['id'])) $this->id = $data['id'];
            
            $this->username = $data['username'];
            $this->firstname = $data['firstname'];
            $this->lastname = $data['lastname'];
            $this->email = $data['email'];
        }
    }

    public function getFullname()
    {
        echo $this->firstname . ' ' . $this->lastname;
    }
}