To control where and how class properties and methods can be accessed, use the following access control keyword:
| Access Level | Description |
|---|---|
| private | allows access only to members of the same class. If A and B are instances of the class C, A can access the properties and methods of B. |
| protected | allows access to members of the same class and instances from classes that inherit from that one only. |
| public | accessible from anywhere. Any classes or code in general from outside the class can access it. |
<?php
class Customer {
private $id;
private $firstname;
private $surname;
private $email;
public function __construct(
int $id,
string $firstname,
string $surname,
string $email
) {
$this->id = $id;
$this->firstname = $firstname;
$this->surname = $surname;
$this->email = $email;
}
}
$customer1 = new Customer(1, 'John', 'Doe', 'a@mail.com');
$customer2 = new Customer(2, 'Mary', 'Smith', 'mp@mail.com');
?>