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Date: Thu, 14 Jan 2021 11:52:24 -0600
Message-ID: <CAH=AbGL4L=uSGYVmZCXvoVsef5Qc-SH-Zmfaojuz+UTU+7S7wA@mail.gmail.com>
To: PHP internals <internals@lists.php.net>
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Subject: Feature Proposal
From: browner12@gmail.com (Andrew Brown)

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This is my first foray into PHP internals, so please let me know if I'm
doing something wrong. Currently just following the instructions from
https://wiki.php.net/rfc/howto.

Currently this proposal is only a "concept".

I propose we add a "default" keyword that can be passed as an argument into
a function/method call. This would allow the calling code to defer to the
function signature for the value of a parameter.

Traditionally, all optional parameters are placed towards the end of the
function parameter list, but as we all know, sometimes this order can be
tricky. So if some calling code wants to override a later parameter, it
currently needs to pass a value to the earlier optional parameters.

A current solution around this is to define all defaults in the body of the
function rather than in the signature.

[image: Screen-Shot-2021-01-14-at-11.45.09-AM.jpg]

However, this adds some extra boilerplate, and we can't use default
parameters as they were really intended.

My proposal is to add a new `default` keyword to be passed as an argument.

[image: Screen-Shot-2021-01-14-at-11.44.57-AM.jpg]

The first call of the function here is how we currently have to do things.
We have to explicitly pass `true` in as the second parameter.

However, in the second call, we now use the new `default` keyword, which
will defer to the function signature for the default value of `$param2`.

Thanks all, looking forward to some feedback!

-- 
Andrew M. Brown

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<div dir=3D"ltr"><div>This is my first foray into PHP internals, so please =
let me know if I&#39;m doing something wrong. Currently just following the =
instructions from=C2=A0<a href=3D"https://wiki.php.net/rfc/howto" target=3D=
"_blank">https://wiki.php.net/rfc/howto</a>.</div><div><br></div><div>Curre=
ntly this proposal is only a &quot;concept&quot;.</div><div><br></div><div>=
I propose we add a &quot;default&quot; keyword that can be passed as an arg=
ument into a function/method call. This would allow the calling code to def=
er to the function signature for the value of a parameter.</div><div><br></=
div><div>Traditionally, all optional parameters are placed towards the end =
of the function parameter list, but as we all know, sometimes this order ca=
n be tricky. So if some calling code wants to override a later parameter, i=
t currently needs to pass a value to the earlier optional parameters.</div>=
<div><br></div><div>A current solution around this is to define all default=
s in the body of the function rather than in the signature.</div><div><br><=
/div><img src=3D"cid:ii_kjx5gdft0" alt=3D"Screen-Shot-2021-01-14-at-11.45.0=
9-AM.jpg" width=3D"500" height=3D"172"><br><div><br></div><div>However, thi=
s adds some extra boilerplate, and we can&#39;t use default parameters as t=
hey were really intended.</div><div><br></div><div>My proposal is to add a =
new `default` keyword to be passed as an argument.</div><div><br></div><div=
><img src=3D"cid:ii_kjx5gk9i1" alt=3D"Screen-Shot-2021-01-14-at-11.44.57-AM=
.jpg" width=3D"500" height=3D"79"><br></div><div><div><br></div><div>The fi=
rst call of the function here is how we currently have to do things. We hav=
e to explicitly pass `true` in as the second parameter.</div><div><br></div=
><div>However, in the second call, we now use the new `default` keyword, wh=
ich will defer to the function signature for the default value of `$param2`=
.</div><div><br></div><div>Thanks all, looking forward to some feedback!</d=
iv></div><div><br></div>-- <br><div dir=3D"ltr" class=3D"gmail_signature" d=
ata-smartmail=3D"gmail_signature">Andrew M. Brown</div></div>

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