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Date: Tue, 8 Sep 2015 09:11:12 +0800
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To: Andrea Faulds <ajf@ajf.me>
Subject: Re: [PHP-DEV] Re: [RFC] [Concept] Class Constant visibility modifiersin PHP 7.1+
From: laruence@gmail.com (Xinchen Hui)



Sent from my iPhone

> On Sep 8, 2015, at 02:09, Andrea Faulds <ajf@ajf.me> wrote:
>=20
> Hi Stas,
>=20
> Stanislav Malyshev wrote:
>>=20
>> Private and protected methods and properties are private for a reason -
>> they may be radically changed or gone when the code is changing, and
>> thus external code should not rely on them, and the way to ensure it is
>> to deny that code access to them. However, I have hard time seeing how
>> that would apply to constants - they shouldn't really change,
>=20
> Why not? A constant's value doesn't change at runtime, but nothing stops y=
ou changing the value in a new version. A real-world example for you: phpng c=
hanged the values of the IS_* constants in the Zend Engine.
>=20
>> and if
>> they do, they either shouldn't be constant, or something in your world
>> changed fundamentally (i.e. scientists discovered that PI actually
>> equals to 4).
>=20
> Constants in code aren't necessarily natural constants.
>=20
> I wonder if you find in your code constant that you need
>> to hide because you foresee it changing - should it really be a constant
>> at all?
>=20
> If I have a value specified in the source code which will not change at ru=
ntime, and which I don't want to expose as part of my public API... what exa=
ctly do you propose it should be? I don't see why a constant isn't fitting.
>=20
public static final as Java does

Thanks
> Thanks.
>=20
> --=20
> Andrea Faulds
> http://ajf.me/
>=20
> --=20
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