__serialize metodi

Sehrli metod __serialize ob'ekt serialize funksiyasi tomonidan serializatsiya qilinganda chaqiriladi. U serializatsiya qilinadigan ma'lumotlar massivini qaytarishi kerak. Ushbu metod PHP 7.4 da __sleep metodiga alternativa sifatida, serializatsiya jarayonini boshqarishda yanada moslashuvchanroq usul bilan paydo bo'ldi.

Sintaksis

public function __serialize(): array

Misol

Keling, qaysi ob'ekt xususiyatlarini serializatsiya qilish kerakligini belgilaydigan __serialize metodiga ega bo'lgan klass yarataylik:

<?php
class User {
	public $name;
	private $password;
	public $email;
	
	public function __construct($name, $password, $email) {
		$this->name = $name;
		$this->password = $password;
		$this->email = $email;
	}
	
	public function __serialize(): array {
		return [
			'name' => $this->name,
			'email' => $this->email,
			'hash' => md5($this->password)
		];
	}
}

$user = new User('John', 'secret123', 'john@example.com');
echo serialize($user);
?>

Kodni bajarish natijasi:

'O:4:"User":3:{s:4:"name";s:4:"John";s:5:"email";s:15:"john@example.com";s:4:"hash";s:32:"e5e9fa1ba31ecd1ae84f75caaa474f3a";}'

Misol

Keling, __serialize va __sleep o'rtasidagi farqni ko'rsatamiz:

<?php
class Product {
	public $id;
	protected $price;
	private $discount;
	
	public function __sleep() {
		return ['id', 'price'];
	}
	
	public function __serialize(): array {
		return [
			'id' => $this->id,
			'price' => $this->price * (1 - $this->discount)
		];
	}
}

$product = new Product();
$product->id = 100;
$product->price = 50;
$product->discount = 0.1;

echo "Sleep: " . serialize($product) . "\n";
echo "Serialize: " . serialize($product);
?>

Kodni bajarish natijasi:

'Sleep: O:7:"Product":2:{s:2:"id";i:100;s:5:"price";i:50;}'
'Serialize: O:7:"Product":2:{s:2:"id";i:100;s:5:"price";d:45;}'

Shuningdek qarang

serialize funksiyasi,
qiymatni saqlanadigan satrga aylantiradi