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Date: Fri, 05 Jan 2024 17:47:54 -0600
To: "php internals" <internals@lists.php.net>
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Subject: Re: Fwd: [PHP-DEV] clarify the destructuring list() concept
From: larry@garfieldtech.com ("Larry Garfield")

On Fri, Jan 5, 2024, at 5:16 PM, M=C3=B6n=C3=B4me Epson wrote:
> ---------- Forwarded message ---------

> I try to follow the procedure of: https://wiki.php.net/rfc/howto
>
> It seems to me that list() is not clearly specified.
> I wanted to know your opinions on this.
>
>
> For example :
> $key =3D "a";
> $value =3D 1;
> $array =3D [$key =3D> $value];
>
> [$key =3D> $value] =3D $array;
>
> We all agree that now $key =3D 'a' and $value =3D 1
>
> And I wonder why
> What happens in this case :
>
> [$key =3D> $value] =3D ['b'=3D>2];
>
> $key =3D 'b' and $value =3D 2 or all is null ?

Please don't top-post.

As for what that does:

https://3v4l.org/5ubJU

That's because the right-side can have many keys with their own values, =
but the left side... doesn't really do that.  The left side only assigns=
 values, not keys.

I'm not sure how it would be useful to decompose like you're describing,=
 since it would only really make sense with a single array item on the l=
eft, which is not a common or useful case.

What you can do, as Rowan noted, is this:

https://3v4l.org/cEmcC

That pulls items out of the array by key, into named variables.

--Larry Garfield