PHP OOP-daky Hususy Usullar

Hususy bolup, diňe häsiýetler däl-de, usullary hem bolup biler. Esasan, hususy etmeklik kömekçi usullaryň daşyndan synagsyz çagyrylmazlygy üçin edilýär.

Geliň, mysal bilen göreli. Bizde aşakdaky klas bolsun:

php<?php
  class User {
    private $name;
    
    public function __construct($name) {
      $this->name = $name;
    }
    
    public function show() {
      return $this->name;
    }
  }
?>

Bu klasda, parametri hökmünde setir aljak we onuň birinji nyşanyny baş harp eden hususy usul ýasaýaly:

php<?php
  class User {
    private $name;
    
    public function __construct($name) {
      $this->name = $name;
    }
    
    public function show() {
      return $this->name;
    }
    
    private function cape($str) {
      return mb_strtoupper(mb_substr($str, 0, 1)) . mb_substr($str, 1);
    }
  }
?>

Indi bu kömekçi usulymyzy beýleki usul içinde ulanýarys:

php<?php
  class User {
    private $name;
    
    public function __construct($name) {
      $this->name = $name;
    }
    
    public function show() {
      return $this->cape($this->name);
    }
    
    private function cape($str) {
      return mb_strtoupper(mb_substr($str, 0, 1)) . mb_substr($str, 1);
    }
  }
?>

Geliň barlayaly. Klasymyzyň objekti ýasaýaly:

php<?php
  $user = new User('john');
?>

Indi kömekçi usul ulanylan umumy usuly çagyrýarys:

php<?php
  echo $user->show();
?>

php<?php
  class Employee {
    public function __construct($name, $salary) {
      $this->name = $name;
      $this->salary = $salary;
    }
    
    public function getSalary() {
      return $this->addSign($this->salary);
    }
    
    public function addSign($num) {
      return $num . '
;
    }
  }
?>