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References: <1845472b-08ab-bb31-dc77-23c620b8d217@mabe.berlin>
 <4D79715B-D9F8-42F8-B0DB-4EA7B6DBFB6A@gmail.com> <58110de6-9d68-869c-9381-d50c1ea46616@mabe.berlin>
In-Reply-To: <58110de6-9d68-869c-9381-d50c1ea46616@mabe.berlin>
Date: Mon, 9 Mar 2020 09:14:39 +0100
Message-ID: <CAF+90c_AdAwJf6kCRBzNEBm2zHO2JnNRHoqkue0OzM4HhL7RVw@mail.gmail.com>
To: Marc <marc@mabe.berlin>
Cc: Matthew Brown <matthewmatthew@gmail.com>, PHP internals <internals@lists.php.net>
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Subject: Re: [PHP-DEV] Bug Wrong resolution of "Late Static Binding" after self::method()
From: nikita.ppv@gmail.com (Nikita Popov)

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On Mon, Mar 9, 2020 at 6:38 AM Marc <marc@mabe.berlin> wrote:

> Hi,
>
>
> On 08.03.20 17:54, Matthew Brown wrote:
> > This is expected behaviour given my understanding of how late static
> binding works:
> >
> > If there is a chain of =E2=80=9Cself::=E2=80=9D calls that ultimately e=
nds in
> =E2=80=9Cstatic::someMethod=E2=80=9D, then PHP behaves as if every preced=
ing call was a
> call to =E2=80=9Cstatic::=E2=80=9D, not =E2=80=9Cself::=E2=80=9D. In your=
 second call you=E2=80=99re explicitly
> overriding that resolution by changing using (self::class)::someMethod,
> which PHP always treats as A::someMethod, thus producing the expected
> output.
>
> Thanks for explaining.
>
> I couldn't find any information for this behavior in the documentation -
> Is that documented anywhere?
>
> Does it make sense? -> I have read "self::" all time as a shortcut for
> "MyClass::" until I noticed this is not the case and I expect most PHP
> devs would explain it this way.
>
> Is there a reason why self:: doesn't reset the internal "static" referenc=
e?
>
>
> Sorry for all these questions.
>
> Sometimes the world could be so simple until it turns out it isn't for
> no reason.
>
>
> Thanks,
>
> Marc
>

See https://wiki.php.net/rfc/lsb_parentself_forwarding, which is the RFC
that added this behavior.

Nikita

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