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Date: Sat, 25 Oct 2025 13:16:40 +0200
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Subject: Re: [PHP-DEV] RFC proposal for adding SORT_STRICT flag to array_unique()
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From: rob@bottled.codes ("Rob Landers")

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On Sat, Oct 25, 2025, at 13:05, Morgan wrote:
> On 2025-10-25 21:23, Rob Landers wrote:
> >=20
> > Other than the bytes in memory and how they=E2=80=99re laid out, I f=
ail to see=20
> > how 100 is different from 100. They=E2=80=99re conceptually identica=
l, and=20
> > array_* functions generally behave by **value**, not by **identity**.
> >
>=20
> In the case of objects, "value" and "identity" are the same thing;=20
> without a __toString() method that always produces different strings f=
or=20
> different objects, array_unique() can't be used to deduplicate an arra=
y=20
> of objects - which I find myself wanting to do on a fairly regular bas=
is.
>=20
> ```
> $uniques =3D array_values(array_combine(array_map(spl_object_id(...),=20
> $source_array), $source_array));
> ```
>=20

Object identity and value are different things... https://3v4l.org/uZTsN

That=E2=80=99s literally the entire point of my original Records RFC: ht=
tps://wiki.php.net/rfc/records =E2=80=94 and a userland implementation h=
ere: https://github.com/withinboredom/records along with a few nice-to-h=
aves https://github.com/withinboredom/common-records

=E2=80=94 Rob
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<!DOCTYPE html><html><head><title></title></head><body><div>On Sat, Oct =
25, 2025, at 13:05, Morgan wrote:</div><blockquote type=3D"cite" id=3D"q=
t" style=3D""><div>On 2025-10-25 21:23, Rob Landers wrote:</div><div>&gt=
;&nbsp;</div><div>&gt; Other than the bytes in memory and how they=E2=80=
=99re laid out, I fail to see&nbsp;</div><div>&gt; how 100 is different =
from 100. They=E2=80=99re conceptually identical, and&nbsp;</div><div>&g=
t; array_* functions generally behave by **value**, not by **identity**.=
</div><div>&gt;</div><div><br></div><div>In the case of objects, "value"=
 and "identity" are the same thing;&nbsp;</div><div>without a __toString=
() method that always produces different strings for&nbsp;</div><div>dif=
ferent objects, array_unique() can't be used to deduplicate an array&nbs=
p;</div><div>of objects - which I find myself wanting to do on a fairly =
regular basis.</div><div><br></div><div>```</div><div>$uniques =3D array=
_values(array_combine(array_map(spl_object_id(...),&nbsp;</div><div>$sou=
rce_array), $source_array));</div><div>```</div><div><br></div></blockqu=
ote><div><br></div><div>Object identity and value are different things..=
.&nbsp;<a href=3D"https://3v4l.org/uZTsN">https://3v4l.org/uZTsN</a></di=
v><div><br></div><div>That=E2=80=99s literally the entire point of my or=
iginal Records RFC:&nbsp;<a href=3D"https://wiki.php.net/rfc/records">ht=
tps://wiki.php.net/rfc/records</a>&nbsp;=E2=80=94 and a userland impleme=
ntation here:&nbsp;<a href=3D"https://github.com/withinboredom/records">=
https://github.com/withinboredom/records</a>&nbsp;along with a few nice-=
to-haves&nbsp;<a href=3D"https://github.com/withinboredom/common-records=
">https://github.com/withinboredom/common-records</a><br></div><div><br>=
</div><div id=3D"sig121229152">=E2=80=94 Rob</div></body></html>
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