Online PHP editor | rfc for XNRiS

@ 2024-10-23T15:48:45Z

<?php

final readonly class Post
{
    public int $id;
    public string $name;
    public string $email;

    public function greet(): string
    {
        return "Hello 👋";
    }
}

final readonly class PostRepository
{
    private ReflectionClass $reflector;

    public function __construct(
    ) {
        $this->reflector = new ReflectionClass(Post::class);
    }

    public function find(int $id): Post
    {
        var_dump("Loading post with ID $id");

        $entity = $this->reflector->newLazyGhost(function ($entity) use ($id) {
            var_dump("Lazy initialization triggered for ID $id");

            $data = $this->loadFromDatabase($id);
            $this->reflector->getProperty('name')->setValue($entity, $data['name']);
            $this->reflector->getProperty('email')->setValue($entity, $data['email']);
        });

        // ID is already known and can be accessed without triggering initialization
        $this->reflector->getProperty('id')->setRawValueWithoutLazyInitialization($entity, $id);

        return $entity;
    }

    private function loadFromDatabase(int $id): array
    {
        // Simulate loading from database
        return [
            'name' => 'John Doe',
            'email' => 'john.doe@example.com',
        ];
    }
}

$em = new PostRepository();
$post = $em->find(42);
var_dump($post);
var_dump($post->greet());
// This will really trigger the lazy initialization
$post->email;
var_dump($post);

Output for git.master, git.master_jit: string(23) "Loading post with ID 42" lazy ghost object(Post)#4 (1) { ["id"]=> int(42) ["name"]=> uninitialized(string) ["email"]=> uninitialized(string) } string(10) "Hello 👋" string(39) "Lazy initialization triggered for ID 42" object(Post)#4 (3) { ["id"]=> int(42) ["name"]=> string(8) "John Doe" ["email"]=> string(20) "john.doe@example.com" }

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2020-03-21 RFC: Is_Literal - declined
2020-12-04 Enumerations - included in PHP 8.1
2018-06-15 Typed Properties v2 - implemented in PHP 7.4
2016-08-12 Object typehint - included in PHP 7.2
2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn
2016-04-19 Lexical scope support for anonymous classes - suspended
2016-04-17 Functional Interfaces - declined
2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0
2015-08-27 Callable Prototypes - declined
2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions
2015-02-18 Scalar type hints v5 - included in PHP 7
2015-02-14 Union Types - declined
2013-09-22 Anonymous classes - included in PHP 7

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