[RFC][Discussion] Make compact function reports undefined passed variables

6 years ago by Gabriel Caruso — view source

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Hello dear internals, how are you?

I'd like to propose a new RFC to PHP's core, but as this one contains a BC
Break, let's discussed it before making anything official.

A couple of days ago, while discussing some Coding Standards rules for
Doctrine, forbidden the compact function, an argument caught my
attention:

The compact function var does not report undefined variables.

Looking in the compact documentation,
this is even emphasizes:

Any strings that are not set will simply be skipped.

I couldn't figure out why this is done this way, but, here's what I'd like
to propose: make the compact function starts to report undefined passed
variables for it.

With only 2 lines of code,
this is possible, but, of course, this is a BC Break.

Let me know your opinion on that, and perhaps, make it happen!

Regards,

Gabriel Caruso

6 years ago by Pieter Hordijk — view source

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----- Original Message -----

From: "Gabriel Caruso" carusogabriel34@gmail.com
To: "internals" internals@lists.php.net
Sent: Monday, April 2, 2018 11:17:43 AM
Subject: [PHP-DEV] [RFC][Discussion] Make compact function reports undefined passed variables

Hello dear internals, how are you?

I'd like to propose a new RFC to PHP's core, but as this one contains a BC
Break, let's discussed it before making anything official.

A couple of days ago, while discussing some Coding Standards rules for
Doctrine, forbidden the compact function, an argument caught my
attention:

The compact function var does not report undefined variables.

Looking in the compact documentation,
this is even emphasizes:

Any strings that are not set will simply be skipped.

I couldn't figure out why this is done this way, but, here's what I'd like
to propose: make the compact function starts to report undefined passed
variables for it.

With only 2 lines of code,
this is possible, but, of course, this is a BC Break.

Let me know your opinion on that, and perhaps, make it happen!

Regards,

Gabriel Caruso

Hey Gabriel,

What I am missing here is the reason why we should break well defined behavior of existing functions.

How is the BC break for all existing code justified?

Pieter

6 years ago by Gabriel Caruso — view source

unread

Hey Gabriel,

What I am missing here is the reason why we should break well defined
behavior of existing functions.

How is the BC break for all existing code justified?

Pieter

Hi Pieter.

What I am missing here is the reason why we should break well defined
behavior of existing functions.

This is something I'd like to discuss about compact. I'd like to know why
we skip undefined variables instead of report them. compact is use in a
large scale by the MVC community, by passing variables in the controller
and using them in the view.

How is the BC break for all existing code justified?

I'd like to start report this undefined variables. Would be one more way to
prevent code-smell. IMHO this belongs to the core, not to the userland.

Thanks,

--
Gabriel Caruso

6 years ago by Pieter Hordijk — view source

unread

Hi Pieter.

What I am missing here is the reason why we should break well defined behavior
of existing functions.

Hi Pieter.

What I am missing here is the reason why we should break well defined behavior
of existing functions.

This is something I'd like to discuss about compact. I'd like to know why we
skip undefined variables instead of report them. compact is use in a large
scale by the MVC community, by passing variables in the controller and using
them in the view.

How is the BC break for all existing code justified?

I'd like to start report this undefined variables. Would be one more way to
prevent code-smell. IMHO this belongs to the core, not to the userland.

Thanks,

--
Gabriel Caruso

Regardless of the why it is like that the fact of the matter is that it is and imho
you would need a really good reason to break existing code.

I still don't don't see your reason for it. Nor do I see how it is a code smell atm.

6 years ago by Ivan Enderlin — view source

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Hello,

Yes, a thousand yes. Silently ignoring undefined variables is a source
of multiple bugs. Emiting a warning is a small BC break comparing to the
benefits.

Regards.

Hello dear internals, how are you?

I'd like to propose a new RFC to PHP's core, but as this one contains a BC
Break, let's discussed it before making anything official.

A couple of days ago, while discussing some Coding Standards rules for
Doctrine, forbidden the compact function, an argument caught my
attention:

The compact function var does not report undefined variables.
Looking in the compact documentation,
this is even emphasizes:

Any strings that are not set will simply be skipped.
I couldn't figure out why this is done this way, but, here's what I'd like
to propose: make the compact function starts to report undefined passed
variables for it.

With only 2 lines of code,
this is possible, but, of course, this is a BC Break.

Let me know your opinion on that, and perhaps, make it happen!

Regards,

6 years ago by Andrea Faulds — view source

unread

And the determined can prefix with an @ if they want similar to old
behaviour :)

Ivan Enderlin wrote:

Hello,

Yes, a thousand yes. Silently ignoring undefined variables is a source
of multiple bugs. Emiting a warning is a small BC break comparing to the
benefits.

Regards.

--
Andrea Faulds
https://ajf.me/

6 years ago by bjorn.x.larsson@telia.com — view source

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And by that one could argue that the BC break is negligible :)
Anyway, I think this is a clear improvement!

Regards

//Björn Larsson

Den 2018-04-09 kl. 23:54, skrev Andrea Faulds:

And the determined can prefix with an @ if they want similar to old
behaviour :)

Ivan Enderlin wrote:

Hello,

Yes, a thousand yes. Silently ignoring undefined variables is a source
of multiple bugs. Emiting a warning is a small BC break comparing to the
benefits.

Regards.