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Date: Sun, 8 Mar 2020 11:54:46 -0500
Message-ID: <4D79715B-D9F8-42F8-B0DB-4EA7B6DBFB6A@gmail.com>
References: <1845472b-08ab-bb31-dc77-23c620b8d217@mabe.berlin>
Cc: internals@lists.php.net
In-Reply-To: <1845472b-08ab-bb31-dc77-23c620b8d217@mabe.berlin>
To: Marc <marc@mabe.berlin>
Subject: Re: [PHP-DEV] Bug Wrong resolution of "Late Static Binding" after self::method()
From: matthewmatthew@gmail.com (Matthew Brown)

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 ends i=
n =E2=80=9Cstatic::someMethod=E2=80=9D, then PHP behaves as if every precedi=
ng 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 b=
y changing using (self::class)::someMethod, which PHP always treats as A::so=
meMethod, thus producing the expected output.

> On Mar 8, 2020, at 4:48 AM, Marc <marc@mabe.berlin> wrote:
>=20
> =EF=BB=BFHi,
>=20
> I have reported a bug in Mai 2019 but did not get any response here https:=
//bugs.php.net/bug.php?id=3D77985.
>=20
>=20
> The problem is that "static::class" as well as "get_called_class()" used w=
ithin a method resolves to a different class if this method was called with "=
self::method". Interestingly it works as expected if the method got called w=
ith "ClassName::method".
>=20
>=20
> I send it here because fixing this could result in a hard to find BC break=
 and it could be a good idea to handle this in 8.0.
>=20
>=20
> https://3v4l.org/NSdB8
>=20
> class A {
>     static function call() {
>         self::method();
>=20
>         $self =3D self::class;
>         $self::method();
>     }
>     static function method() { echo static::class; }
> }
>=20
> class B extends A {}
>=20
> B::call(); // displays "BA" instead of "AA"
>=20
>=20
> In case this is "Not a Bug" please explain to me why the result of "self::=
method()" is different then "$self =3D self::class; $self::method();".
>=20
>=20
> Thanks,
>=20
> Marc
>=20
> --=20
> PHP Internals - PHP Runtime Development Mailing List
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>=20