如何在OOP PHP中使用数组参数覆盖超类构造函数

Question

Hello i have a problem in OOP PHP. I try override constructor from superclass to subclass with array parameter in it. This is my superclass code :

    <?php
        class Person 
        {

            private $firstName;
            private $lastName;
            private $gender;
            private $dob;
            private $address;
            private $country;
            private $phone;
            private $occupation;

            public function __construct($array) {
                foreach($array as $key => $value) {
                    $this->$key = $value;
                }
            }


                public function setFirstName($firstName) {
                    $this->firstName = $firstName;
                }

                public function getFirstName() {
                    return $this->firstName;
                }
            // Another Getter and Setter
            // ...

And this is my subclass code :

<?php

    class Register extends Person
    {

        private $nickName;
        private $email;

        public function __construct($array) {
            parent::__construct($array);
        }

        // Getter and Setter
        // ...

But when i try to access nickName and email, i get an error like this :

Fatal error: Cannot access private property Register::$email in C:\xampp\htdocs\php\oop\class\person.class.php on line 16

And this is my test code :

<?php
    function __autoload($myClass) {
        require_once 'class/' . $myClass . '.class.php';
    }

    $data = array(
        'firstname'     => $_POST['first_name'],
        'lastname'      => $_POST['last_name'],
        'nickname'      => $_POST['nick_name'],
        'gender'        => $_POST['gender'],
        'dob'           => $_POST['dob'],
        'address'       => $_POST['address'],
        'zipcode'       => $_POST['zipcode'],
        'country'       => $_POST['country'],
        'phone_number'  => $_POST['phone_number'],
        'email'         => $_POST['email'],
        'occupation'    => $_POST['occupation']
    );


    $account = new Register($data);
    echo $account->getFirstName();

    // Proses DB
    // $db->insert($account);

?>

Any Sugesstion? Thank you.

Answer :

I already find solutions. Key name in array must same with class property. In array i write firstname and property firstName, the correct way is firstName in both, array and property.

Answer 1

One option is to make your private properties protected, so they can be accessed from a parent method.

Another option is to initialize the subclass's properties in the subclass constructor, and remove those entries from the array:

class Register extends Person
{

    private $nickName;
    private $email;

    public function __construct($array) {
        if (isset($array(['nickName'])) {
            $this->nickName = $array['nickName'];
            unset $array(['nickName'];
        }
        if (isset($array(['email'])) {
            $this->email = $array['email'];
            unset $array(['email'];
        }
        parent::__construct($array);
    }