class.php

<?php
class Person {
    private $firstname;
    private $lastname;
    private $email;
    private $password;

    public function __construct() {
    }

    public function getName() {
    }

    public function registerPerson($fn, $ln, $em, $pw) {
    }

    public function loginPerson($em, $pw) {
    }

    public function changeLastName($cln) {
    }
}

class mysqli_database {
    private $_link;

    public function connect($server='localhost', $username='root', $password='geheim', $database = 'systeem_db') {
        $this->_link = mysqli_connect($server, $username, $password, $database);
    }
    public function error() {
        return mysqli_error($this->_link);
    }
    public function errno() {
        return mysqli_errno($this->_link);
    }
    public function escape($string) {
        return mysqli_real_escape_string($this->_link, $string);
    }
    public function query($query) {
        return mysqli_query($this->_link, $query);
    }
    public function fetchArray($result, $array_type = MYSQL_BOTH) {
        return mysqli_fetch_array($result, $array_type);
    }
    public function fetchRow($result) {
        return mysqli_fetch_row($result);
    }
    public function fetchAssoc($result) {
        return mysqli_fetch_assoc($result);
    }
    public function fetchObject($result) {
        return mysqli_fetch_object($result);
    }
    public function numRows($result) {
        return mysqli_num_rows($result);
    }
    public function close() {
        return mysqli_close($this->_link);
    }
}
?>