Newsgroups: php.internals
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Date: Sat, 22 Nov 2025 12:46:18 +0100 (CET)
To: Edmond Dantes <edmond.ht@gmail.com>
Cc: internals@lists.php.net
Message-ID: <2015208655.784984.1763811978476@email.ionos.de>
In-Reply-To: <1402906904.784903.1763811759896@email.ionos.de>
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Subject: Re: [PHP-DEV] [VOTE] True Async RFC 1.6
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From: mails@thomasbley.de (Thomas Bley)


> Thomas Bley <mails@thomasbley.de> hat am 22.11.2025 12:42 CET geschriebe=
n:
>=20
> =20
> > Edmond Dantes <edmond.ht@gmail.com> hat am 22.11.2025 11:37 CET geschr=
ieben:
> >=20
> > =20
> > Hello
> >=20
> > > I expect that's already a good improvement for many use cases to rea=
d multiple files in parallel, run multiple queries in parallel, etc.
> >=20
> > I see. You want to get several promises to wait for?
> > Then there is a good way to do it without additional functions:
> >=20
> > ```php
> > $promise1 =3D spawn(file_get_content(...), "file1.txt");
> > $promise2 =3D spawn(file_get_content(...), "file2.txt");
> > $promise3 =3D spawn(file_get_content(...), "file3.txt");
> > ```
> >=20
> > This is equivalent because a coroutine is a Future. In the same way,
> > you can turn any other function into a Promise without creating a
> > separate API.
> >=20
> > There is a nuance regarding resources. And in certain scenarios,
> > creating an array of Promises in another way can save memory. For
> > example, a scenario where you need to handle a large array of sockets.
> > Such cases require a special API.
> >=20
> > ---
> > Ed
>=20
> Hello,
>=20
> function return types should not depend on the outside context (spawn, h=
ook, ini, etc.) because when the code gets more complex, it's very hard to=
 find the outside context.
>=20
> So file_get_contents() should always return string|false, file_get_conte=
nts_async() should always return a promise object.
>=20
> From the example I would expect it like this:
>=20
> $promise1 =3D file_get_content_async("file1.txt");
> $promise2 =3D file_get_content_async("file2.txt");
> $promise3 =3D file_get_content_async("file3.txt");
>=20
> // do sth else
>=20
> $content1 =3D $promise->await();
> $content2 =3D $promise->await();
> $content3 =3D $promise->await();
>=20
> PHP got very successful by making things easier than in C, this should b=
e the path to continue.
>=20
> Best Regards
> Thomas

I'm sorry, the correct example should be:

$promise1 =3D file_get_content_async("file1.txt");
$promise2 =3D file_get_content_async("file2.txt");
$promise3 =3D file_get_content_async("file3.txt");

// do sth else

$content1 =3D $promise1->await();
$content2 =3D $promise2->await();
$content3 =3D $promise3->await();

Best Regards
Thomas