Newsgroups: php.internals
Path: news.php.net
Xref: news.php.net php.internals:117637
MIME-Version: 1.0
References: <CAFv4g+Ej4JbM9SzQ0iU-d8C4T+2XNo=8jnJ1uwfQ=skZZXx9Tg@mail.gmail.com>
 <42D0A480-F262-4F72-9C4D-887762A8D800@gmail.com> <CAFv4g+ELZ5ZA6zyDFHCJCM6vSy3MFTvEGS9=zo5ZM1izHQWuFw@mail.gmail.com>
 <0b061f28-a087-efd3-8602-424ee03458e0@gmail.com> <CAFv4g+HROPPx4hT226ypbKZwM_7nq31jJ6+X+RNq_THZDVrJPA@mail.gmail.com>
 <CALKiJKpPri6A35_g4XqWOG4Zm3XMdz4Z3gRFyMTh9V2TxrbYmg@mail.gmail.com>
 <7DB0A01F-04FB-420D-9025-E027E5DE02F7@craigfrancis.co.uk> <c3197e59-3447-0ebc-094b-cb1d67e2314b@gmail.com>
 <19b2d192-fc4a-4122-8a01-54316a50fc1e@www.fastmail.com>
In-Reply-To: <19b2d192-fc4a-4122-8a01-54316a50fc1e@www.fastmail.com>
Date: Wed, 27 Apr 2022 17:30:45 +0100
Message-ID: <CAFv4g+E2B+ittxdvur_Q5wUOKHP36ycX5gVg25aiWK_p3zznng@mail.gmail.com>
To: Larry Garfield <larry@garfieldtech.com>
Cc: php internals <internals@lists.php.net>
Content-Type: multipart/alternative; boundary="0000000000006bd08405dda555e3"
Subject: Re: [PHP-DEV] NULL Coercion Consistency
From: craig@craigfrancis.co.uk (Craig Francis)

--0000000000006bd08405dda555e3
Content-Type: text/plain; charset="UTF-8"

On Mon, 25 Apr 2022 at 23:18, Larry Garfield <larry@garfieldtech.com> wrote:

> <off topic>
>
> Internal functions error if you pass excessive arguments to a non-variadic
> function.  User-space functions just ignore the extras.  This is an
> inconsistency that has caused me considerable grief in the past year.
>
> I know Joe has said he wants userspace to become more strict like internal
> on this one.  I will not predict what actually happens.
>
> </off topic>



Just to note our off-list discussion, this is shown with:

```
function example($a) {
  var_dump(func_get_args());
}

$a = example('A', 'B'); // Fine
$b = strlen('A', 'B'); // Expects exactly 1 argument, 2 given
```

It's due to the old (pre-variadic) approach of using `func_get_args()`,
`func_num_args()`, etc...

https://www.php.net/manual/en/functions.arguments.php#functions.variable-arg-list

"It is also possible to achieve variable-length arguments by using
func_num_args(), func_get_arg(), and func_get_args() functions. This
technique is not recommended as it was used prior to the introduction of
the ... token."

I'd also note that using these functions (instead of "...$var") aren't so
good for IDE's or Static Analysis, as the function signature does not
clearly define the parameters exist (let alone type)... so these `func_*`
functions might be candidates for deprecation, if anyone cares enough about
them :-)

Craig

--0000000000006bd08405dda555e3--