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Date: Thu, 15 May 2025 09:11:34 +0100
To: internals@lists.php.net
Subject: Re: [PHP-DEV] Module or Class Visibility, Season 2
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From: imsop.php@rwec.co.uk ("Rowan Tommins [IMSoP]")



On 14 May 2025 22:27:32 BST, Rob Landers <rob@bottled=2Ecodes> wrote:
>
>As written, that simply isn't possible in PHP because there is only one c=
lass allowed with a given name=2E Names of classes are global=2E I don't th=
ink this has to be the case, though=2E Different languages take different a=
pproaches to this=2E For example, JavaScript allows each module to "close o=
ver" its dependencies so each module can import its own version of dependen=
cies=2E

I would say that JavaScript doesn't just *allow* this, as an added feature=
, it *requires* it, as a fundamental design decision:=20

- In JavaScript, Python, etc, when you declare a function or class, you ar=
e creating an anonymous object, and assigning it to a local variable=2E Cod=
e reuse requires you to pass that object around=2E
- In PHP, Java, C#, etc, when you declare a function or class, you are add=
ing a permanent named item to a global list=2E Code reuse is about knowing =
the global names of things=2E=20

It's worth noting that JavaScript didn't need to add *any* features to mak=
e NPM,  Bower, etc work; everything they do is based on the fact that decla=
rations are objects which can be passed around at will=2E=20

That's why I don't think "JavaScript can do it" is relevant, because the *=
way* JavaScript does it is impossible in PHP=2E We're much better off looki=
ng at how *PHP* works, and what problems we're actually trying to solve=2E=
=20

And that in turn is why I was reaching for Linux containers as an alternat=
ive analogy, to think about the problem without jumping to the wrong soluti=
on=2E

Rowan Tommins
[IMSoP]