__clone metodi

__clone metodi clone operatori ishlatilganda avtomatik ravishda chaqiriladi. U ob'ektni nusxalashning o'zimizning mantiqimizni belgilash imkonini beradi. Standart holatda PHP ob'ektning barcha xususiyatlarini sathiy nusxalaydi. __clone metodi chuqur nusxalashni amalga oshirish yoki klonlash paytida xatti-harakni o'zgartirish kerak bo'lganda foydalidir.

Sintaksis

public function __clone(): void

Misol

Ob'ektning asosiy klonlashini amalga oshiramiz:

<?php
	class User {
		public $name;
		
		public function __construct($name) {
			$this->name = $name;
		}
		
		public function __clone() {
			echo 'Ob\'ekt klonlandi';
		}
	}
	
	$user1 = new User('John');
	$user2 = clone $user1;
?>

Kodni bajarish natijasi:

'Ob\'ekt klonlandi'

Misol

Ichki ob'ektlar bilan ob'ektning chuqur nusxasini amalga oshiramiz:

<?php
	class Address {
		public $city;
		
		public function __construct($city) {
			$this->city = $city;
		}
	}
	
	class User {
		public $name;
		public $address;
		
		public function __construct($name, $city) {
			$this->name = $name;
			$this->address = new Address($city);
		}
		
		public function __clone() {
			$this->address = clone $this->address;
		}
	}
	
	$user1 = new User('John', 'New York');
	$user2 = clone $user1;
	$user2->address->city = 'Boston';
	
	echo $user1->address->city;
?>

Kodni bajarish natijasi:

'New York'

Misol

Klonlash paytida noyob identifikator qo'shamiz:

<?php
	class Product {
		public $id;
		public $name;
		
		public function __construct($name) {
			$this->id = uniqid();
			$this->name = $name;
		}
		
		public function __clone() {
			$this->id = uniqid();
		}
	}
	
	$product1 = new Product('Laptop');
	$product2 = clone $product1;
	
	echo $product1->id . ' ' . $product2->id;
?>

Kodni bajarish natijasi (misol):

'5f1a2b3c 5f1a2b3d'

Shuningdek qarang

__construct metodi,
bu ob'ektning konstruktori hisoblanadi