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Date: Tue, 24 Feb 2026 23:29:51 +0100
Message-ID: <CAOWwgpnfqFaF8grWukg-0sHzyBkwxyRPBwUQb+UD1jq+T-v3zQ@mail.gmail.com>
Subject: Re: [PHP-DEV] [RFC] Allow Reassignment of Promoted Readonly
 Properties in Constructor
To: Larry Garfield <larry@garfieldtech.com>
Cc: php internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="000000000000b03f5f064b996da6"
From: nicolas.grekas+php@gmail.com (Nicolas Grekas)

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Le mar. 24 f=C3=A9vr. 2026 =C3=A0 20:57, Larry Garfield <larry@garfieldtech=
.com> a
=C3=A9crit :

> On Tue, Feb 24, 2026, at 1:34 PM, Nicolas Grekas wrote:
>
> >> Otherwise, I'm happy with where this ended up.  Thanks!
> >>
> >
> > Thanks for having a look!
> > Here is the update:
> >
> https://wiki.php.net/rfc/promoted_readonly_constructor_reassign?do=3Ddiff=
&rev2%5B0%5D=3D1771797005&rev2%5B1%5D=3D1771961558&difftype=3Dsidebyside
> >
> > Cheers,
> > Nicolas
>
> > Property hooks cannot be combined with CPP, so properties must be
> declared separately
>
> This is untrue.  The following code is legal:
>
> class Point {
>     public function __construct(
>         public float $x =3D 0.0 { set =3D> abs($value); },
>         public float $y =3D 0.0 { set =3D> abs($value); },
>     ) {}
> }
>
> The point about readonly is valid, and worth keeping, as is the "affects
> all writes" question, but the code above is possible.
>
>
My bad, I should get used to them more :)

https://wiki.php.net/rfc/promoted_readonly_constructor_reassign?do=3Ddiff&r=
ev2%5B0%5D=3D1771961558&rev2%5B1%5D=3D1771972141&difftype=3Dsidebyside

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<div dir=3D"ltr"><div dir=3D"ltr"><br></div><br><div class=3D"gmail_quote g=
mail_quote_container"><div dir=3D"ltr" class=3D"gmail_attr">Le=C2=A0mar. 24=
 f=C3=A9vr. 2026 =C3=A0=C2=A020:57, Larry Garfield &lt;<a href=3D"mailto:la=
rry@garfieldtech.com">larry@garfieldtech.com</a>&gt; a =C3=A9crit=C2=A0:<br=
></div><blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;=
border-left:1px solid rgb(204,204,204);padding-left:1ex">On Tue, Feb 24, 20=
26, at 1:34 PM, Nicolas Grekas wrote:<br>
<br>
&gt;&gt; Otherwise, I&#39;m happy with where this ended up.=C2=A0 Thanks!<b=
r>
&gt;&gt; <br>
&gt;<br>
&gt; Thanks for having a look!<br>
&gt; Here is the update: <br>
&gt; <a href=3D"https://wiki.php.net/rfc/promoted_readonly_constructor_reas=
sign?do=3Ddiff&amp;rev2%5B0%5D=3D1771797005&amp;rev2%5B1%5D=3D1771961558&am=
p;difftype=3Dsidebyside" rel=3D"noreferrer" target=3D"_blank">https://wiki.=
php.net/rfc/promoted_readonly_constructor_reassign?do=3Ddiff&amp;rev2%5B0%5=
D=3D1771797005&amp;rev2%5B1%5D=3D1771961558&amp;difftype=3Dsidebyside</a><b=
r>
&gt;<br>
&gt; Cheers,<br>
&gt; Nicolas<br>
<br>
&gt; Property hooks cannot be combined with CPP, so properties must be decl=
ared separately<br>
<br>
This is untrue.=C2=A0 The following code is legal:<br>
<br>
class Point {<br>
=C2=A0 =C2=A0 public function __construct(<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 public float $x =3D 0.0 { set =3D&gt; abs($valu=
e); }, <br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 public float $y =3D 0.0 { set =3D&gt; abs($valu=
e); },<br>
=C2=A0 =C2=A0 ) {}<br>
}<br>
<br>
The point about readonly is valid, and worth keeping, as is the &quot;affec=
ts all writes&quot; question, but the code above is possible.<br>
<br></blockquote><div><br></div><div>My bad, I should get used to them more=
 :)</div><div><br></div><div><a href=3D"https://wiki.php.net/rfc/promoted_r=
eadonly_constructor_reassign?do=3Ddiff&amp;rev2%5B0%5D=3D1771961558&amp;rev=
2%5B1%5D=3D1771972141&amp;difftype=3Dsidebyside">https://wiki.php.net/rfc/p=
romoted_readonly_constructor_reassign?do=3Ddiff&amp;rev2%5B0%5D=3D177196155=
8&amp;rev2%5B1%5D=3D1771972141&amp;difftype=3Dsidebyside</a></div><div><br>=
</div><div>=C2=A0</div></div></div>

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