<?php

class Foo implements Serializable
{
    private $foo;
    
    private $bar;
    
    private $isCreatedBySerialization = false;
    
    public function __construct(int $foo, int $bar)
    {
        $this->foo = $foo;
        $this->bar = $bar;
    }
    
    public function serialize()
    {
        return serialize([
            'foo' => $this->foo,
            'bar' => $this->bar,
        ]);
    }
    
    public function unserialize($serialized)
    {
        $unserialized = unserialize($serialized);
        $this->foo = $unserialized['foo'];
        $this->bar = $unserialized['bar'];
        $this->isCreatedBySerialization = true;
    }
}

$foo = new Foo(3, 6);
dump($foo);

dump($serializedFoo = serialize($foo));
dump(unserialize($serializedFoo));

^ Foo {#1390

  -foo: 3

  -bar: 6

  -isCreatedBySerialization: false

}

^ "C:3:"Foo":34:{a:2:{s:3:"foo";i:3;s:3:"bar";i:6;}}"

^ Foo {#1400

  -foo: 3

  -bar: 6

  -isCreatedBySerialization: true

}

• Internationalization of date formats
• Predefined formats for DateTime class
• Anonymous classes in PHP 7

PHP 8.2, Laminas MVC 3.2, Symfony 5.2, Laravel 8.28, PHPUnit 9.5, Doctrine ORM 2.8