Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:77897
Mailing-List: contact internals-help@lists.php.net; run by ezmlm
Received-SPF: pass (pb1.pair.com: domain gmail.com designates 209.85.220.53 as permitted sender)
Content-Type: text/plain; charset=windows-1252
Mime-Version: 1.0 (Mac OS X Mail 7.3 \(1878.6\))
In-Reply-To: <000901cfe5f7$c7acd7f0$570687d0$@tutteli.ch>
Date: Sun, 12 Oct 2014 17:18:06 +0800
Cc: PHP Internals <internals@lists.php.net>
Content-Transfer-Encoding: quoted-printable
Message-ID: <890063F8-F4F1-43CE-BE25-E5702DFDD87E@gmail.com>
References: <000901cfe5f7$c7acd7f0$570687d0$@tutteli.ch>
To: Robert Stoll <php@tutteli.ch>
Subject: Re: [PHP-DEV] disallow non-static method calls with self/static in PHP 7
From: tjerk.meesters@gmail.com (Tjerk Meesters)


On 12 Oct 2014, at 16:37, Robert Stoll <php@tutteli.ch> wrote:

> Hey,
>=20
>=20
>=20
> I just stumbled over a method call of a non-static method with self =
and was asking myself again, why does PHP support
> this behaviour.  An example to outline what I am writing of:
>=20
>=20
>=20
> class A{
>=20
>  function foo(){
>=20
>    self::bar();
>=20
>  }
>=20
>  function bar(){}
>=20
> }
>=20
>=20
>=20
> IMO it should not be allowed to call non-static methods with self or =
static. Sure, it is just a small detail but for
> someone who starts learning PHP it is an unnecessary supplement.

The use of self::, static:: (or parent:: for that matter) itself doesn=92t=
 make a method call static; it=92s the declaration or caller context =
that makes it behave statically, i.e. $this can=92t be used.

In your given example, $this is defined when A::bar() is called; =
interestingly, when this class is extended it will still only call =
A::bar() as opposed to calling $this->bar(). Whether this is useful =
behaviour is irrelevant :)

The use of static::bar() is kind of pointless, because AFAICT there=92s =
no difference between that and $this->bar() in this particular example.

>=20
> Maybe it is too drastic to disallow it in PHP 7 but yeah. I would like =
to know what you think about it and if someone
> has a good reason why it is allowed nowadays then please help me out.
>=20
>=20
>=20
> Cheers,
>=20
> Robert
>=20