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Date: Sun, 08 Mar 2020 11:14:03 +0000
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To: internals@lists.php.net,Marc <marc@mabe.berlin>
Message-ID: <577AEC29-07C5-4B5D-BC90-14E09063AAB1@gmail.com>
Subject: Re: [PHP-DEV] Bug Wrong resolution of "Late Static Binding" after self::method()
From: rowan.collins@gmail.com (Rowan Tommins)

On 8 March 2020 09:47:37 GMT+00:00, Marc <marc@mabe=2Eberlin> wrote:
>https://3v4l=2Eorg/NSdB8
>
>class A {
> =C2=A0=C2=A0=C2=A0 static function call() {
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 self::method();
>
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 $self =3D self::class;
> =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0 $self::method();
> =C2=A0=C2=A0=C2=A0 }
> =C2=A0=C2=A0=C2=A0 static function method() { echo static::class; }
>}
>
>class B extends A {}
>
>B::call(); // displays "BA" instead of "AA"


Someone else may be able to confirm if this is a bug or working as designe=
d, but what seems to be happening is that the value of "static" is not rese=
t when calling a method using self::

This doesn't just apply to getting the class name, but to actual static ca=
lls; for instance:

# https://3v4l=2Eorg/p2g8E
class A {
    static function call() {
        self::method1();
    }
    static function method1() {
        static::method2();=20
    }
    static function method2() {
        echo 'Base definition';
    }
}
class B extends A {
    static function method2() {=20
        echo 'Override';
    }
}
B::call();

If the call to self::method1() reset the called class, this would run A::m=
ethod2() and echo 'Base definition'; instead, the called class is remembere=
d, and it calls B::method2() and echoes 'Override'=2E

If you explicitly call A::method1(), as you are effectively doing in your =
self::class example, the "called class" information is reset, and the call =
goes through to A::method2()=2E

Regards,
Hi Marc,

--=20
Rowan Tommins
[IMSoP]