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@ 2022-04-13T12:55:14Z

<?php

class Foo
{
    private ?int $id;
    private ?string $name;
    
    /**
     * @param null|int<1, 20> $id
     */
    private function __construct(?int $id = null, ?string $name = null)
    {
        $this->id = $id;
        $this->name = $name;
    }
    
    final public static function withId(int $id) : self
    {
        if ($id < 1 || $id > 20) {
            throw new \Exception();
        }
        
        $self = new self;
        $self->__construct($id);
        
        return $self;
    }
}

class Bar
{
    private ?int $id;
    private ?string $name;
    
    /**
     * @param null|int<1, 20> $id
     */
    private function __construct(?int $id = null, ?string $name = null)
    {
        $this->id = $id;
        $this->name = $name;
    }
    
    final public static function withId(int $id) : self
    {
        if ($id < 1 || $id > 20) {
            throw new \Exception();
        }
        
        return new self($id);
    }
}

$foo = Foo::withId(1);
var_dump($foo);

$bar = Bar::withId(1);
var_dump($bar);

Output for git.master, git.master_jit, rfc.property-hooks: object(Foo)#1 (2) { ["id":"Foo":private]=> int(1) ["name":"Foo":private]=> NULL } object(Bar)#2 (2) { ["id":"Bar":private]=> int(1) ["name":"Bar":private]=> NULL }

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2022-12-01 RFC: Property hooks - included in PHP 8.4
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2016-08-14 Arrow functions - withdrawn
2016-05-29 array_change_keys() - withdrawn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2016-03-16 Typed Properties - superseded in favor of Typed Properties 2.0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2015-05-01 Short Closures - declined / withdrawn in favor of Arrow Functions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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