PHP da OOP da Himoyalangan Xususiyatlar

PHP shuningdek himoyalangan xususiyatlarni qo'llab-quvvatlaydi. Ular ham protected modifikatori yordamida e'lon qilinadi. Bunday xususiyatlar meros qolinadi va voris sinflarda mavjud bo'ladi.

Keling, yoshi saqlovchi himoyalangan xususiyatga ega ota-sinf yarataylik:

php<?php
  class User {
    protected $age;
    
    public function setAge($age) {
      $this->age = $age;
    }
    public function getAge() {
      return $this->age;
    }
  }
?>

Voris sinfda yoshni bittaga oshiradigan metod yaratamiz:

php<?php
  class Student extends User {
    public function incAge() {
      $this->age++;
    }
  }
?>

php<?php
  class User {
    private $name;
    
    public function setName($name) {
      $this->name = $name;
    }
    public function getName() {
      return $this->name;
    }
  }
  
  class Employee extends User {
    public function setName($name) {
      if (strlen($name) > 0) {
        $this->name = $name;
      }
    }
  }
?>