PHP-de OOP-de miras almakda hususy usullar

Hususy usullar miras alynmaýar. Bu inkapsulýasiýany bozmazlyk üçin ýörite edilendir. Geliň, mysal üsti bilen göreli. Bizde aşakdaky ata klas, onuň hususy usuly bilen, bolsun:

php<?php
  class User {
    private $name;
    
    public function setName($name) {
      $this->name = $name;
    }
    public function getName() {
      return $this->capeFirst($this->name);
    }
    
    private function capeFirst($str) {
      return ucfirst($str);
    }
  }
?>

Ata klasdan aşakdaky klas miras alsyn:

php<?php
  class Student extends User {
    private $surn;
    
    public function setSurn($surn) {
      $this->surn = $surn;
    }
    public function getSurn() {
      return $this->surn;
    }
  }
?>

Döwür atanyň hususy usulyny ulanmak islesin. PHP muna rugsat bermez we ýalňyşlyk çykarar:

php<?php
  class Student extends User {
    private $surn;
    
    public function setSurn($surn) {
      $this->surn = $surn;
    }
    public function getSurn() {
      return $this->capeFirst($this->surn); // ýalňyşlyk bolar
    }
  }
?>