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Date: Wed, 25 May 2016 21:43:32 +0200
Message-ID: <CADyq6sK61-Y5avuD-5GO=uPKh=9HQrjSZWt2WJj=f1Qu+GUVQw@mail.gmail.com>
To: Niklas Keller <me@kelunik.com>
Cc: PHP Internals <internals@lists.php.net>, Stanislav Malyshev <smalyshev@gmail.com>, 
	Andrea Faulds <ajf@ajf.me>
Content-Type: multipart/alternative; boundary=001a114b3100b4c3750533afe49b
Subject: Re: [PHP-DEV] [RFC][Vote] Typed Properties
From: ocramius@gmail.com (Marco Pivetta)

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Content-Type: text/plain; charset=UTF-8

On 25 May 2016 at 21:13, Niklas Keller <me@kelunik.com> wrote:

> Unset can reset it to the default value, but wiping type information is
> probably
> not an option here.
>

Wiping type info is indeed unwanted. As it currently stands, for example,
un-setting a property and then re-assigning it retains its visibility
properties, and doesn't destroy property information.

See https://3v4l.org/pCmTV for an example (copied here for reference):

<?php

class Foo
{
    private $bar = 'baz';

    public function __construct()
    {
        unset($this->bar);
    }

    public function getFooBar()
    {
        return $this->bar;
    }
}

class Bar extends Foo
{
    private $bar = 'baz';

    public function __construct()
    {
        parent::__construct();

        unset($this->bar);
    }

    public function getBarBar()
    {
        return $this->bar;
    }
}

$bar = new Bar();

var_dump($bar->getFooBar()); // notice + null
var_dump($bar->getBarBar()); // notice + null

$rBarBar = new ReflectionProperty(Foo::class, 'bar');
$rBarBar->setAccessible(true);
$rBarBar->setValue($bar, __LINE__);

var_dump($bar->getFooBar()); // line no.
var_dump($bar->getBarBar()); // notice + null

Marco Pivetta

http://twitter.com/Ocramius

http://ocramius.github.com/

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