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Mon, 23 Feb 2026 08:56:11 -0800 (PST) Precedence: list list-help: list-unsubscribe: list-post: List-Id: x-ms-reactions: disallow MIME-Version: 1.0 References: <1f25d77e-224b-40d6-bf19-18dfdfc9de54@rwec.co.uk> <453bc043-b4ee-423e-9561-55510f5c20a7@rwec.co.uk> <6412E222-9B0F-4139-A6F9-7D0C686197BF@rwec.co.uk> In-Reply-To: Date: Mon, 23 Feb 2026 23:56:00 +0700 X-Gm-Features: AaiRm50n5aBks-eJZzNabXw0sY7VD3jiKyFCJk26QSSLrbQhsQO5Sq_MyTW_kzY Message-ID: Subject: Re: [PHP-DEV] [IDEA for RFC] let the "new" operator fail when the __construct() function returns a value. To: Mirco Babin Cc: "Rowan Tommins [IMSoP]" , PHP internals Content-Type: multipart/alternative; boundary="000000000000ecfbdc064b80a568" From: pierre.php@gmail.com (Pierre Joye) --000000000000ecfbdc064b80a568 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable hi Mirco, On Mon, Feb 23, 2026, 11:00=E2=80=AFPM Mirco Babin = wrote: > Hello Pierre, > > Op vr 20 feb 2026 om 19:29 schreef Pierre Joye : > > > > Hello Mirco, > > > > > In a context of __construct, disallow any return value can be detected > > as well. Any return statement with anything used with it can be > > rejected (and should). > > > > It is documented as void, we could "fix" it with a bug fix. > > - https://www.php.net/manual/en/language.oop5.decon.php#object.construct > lists the __construct() function as void. > - But the implementation of __construct() is mixed. > > l > see https://www.php.net/manual/en/language.oop5.decon.php __construct(mixed ...$values =3D ""): void > I have found https://php-legacy-docs.zend.com/manual/php4/en/migration5. > But I didn't find any specific __construct() instructions, other than > https://php-legacy-docs.zend.com/manual/php4/en/language.oop5.decon. At > that page, it is not mentioned the __construct() must not return a value. > it should I think, maybe it was not done for bc or avoid breaking codes, but it was years ago. > Could you explain on serialization or hydration challenges in more > details? Perhaps with a theoretical example? > An (old) real-world example would be even better, if you can find one. > Sorry, i do not have the time to look. Try to google a bit, quite a lot of old bugs in various projects about that. Best, > --000000000000ecfbdc064b80a568 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
hi Mirco,




On Mon, Feb 23, 2026, 11:00=E2=80=AFPM Mirco Babin <mirco.babin@gmail.com> wrote:
<= blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px= #ccc solid;padding-left:1ex">Hello Pierre,

Op vr 20 feb 2026 om 19:29 schreef Pierre Joye <pierre.php@gmail.com>:
>
> Hello Mirco,
>

> In a context of __construct, disallow any return value can be detected=
> as well. Any return statement with anything used with it can be
> rejected (and should).
>
> It is documented as void, we could "fix" it with a bug fix.<= br>
- https://www.php.n= et/manual/en/language.oop5.decon.php#object.construct
=C2=A0 lists the __construct() function as void.
- But the implementation of __construct() is mixed.

l




__construct(mixed=C2=A0...$values=C2=A0=3D &= quot;"):=C2=A0void


I have found https://php-legacy= -docs.zend.com/manual/php4/en/migration5.
But I didn't find any specific __construct() instructions, other than https://php-legacy-doc= s.zend.com/manual/php4/en/language.oop5.decon. At
that page, it is not mentioned the __construct() must not return a value.

it= should I think, maybe it was not done for bc or avoid breaking codes, but = it was years ago.


Could you explain on serialization or hydration challenges in more
details? Perhaps with a theoretical example?
An (old) real-world example would be even better, if you can find one.
<= /blockquote>

Sorry= , i do not have the time to look. Try to google a bit, quite a lot of old b= ugs in various projects about that.

Best,=C2=A0
--000000000000ecfbdc064b80a568--