>In my opinion, deprecating this does not do anything besides annoying
users.

In my opinion, since it isn't, and likely never was, a legal ISO8601
string, it's a no-brainer that it should be deprecated. (it's at least
been illegal since iso8601:2004 released in 2004)

On Fri, 26 May 2023 at 12:17, Derick Rethans <der...@php.net> wrote:
>
> On Fri, 19 May 2023, Jorg Sowa wrote:
>
> > I would like to propose the deprecation of the constants DATE_ISO8601,
> > DateTimeInterface::ISO8601 and DateTimeInterface::RFC7231, DATE_RFC7231.
>
> …
>
> > In my opinion the question is not whether this constant should be
> > deprecated, but when. I know that the problem was discussed in the past,
> > but I hope enough time has passed already to touch this topic again
> > although of the BC nature. [6] <https://externals.io/message/113657#114885>
> > [7]
>
> In my opinion, deprecating this does not do anything besides annoying
> users.
>
> > <https://www.reddit.com/r/PHP/comments/hnd438/why_isnt_date_iso8601_deprecated/>
> > Arguments for deprecating DATE_RFC7231:
> > - error prone nature, the format never really supported timezone. I'm not
> > sure how it appeared in the code, but tests clearly lack cases for this
> > format. I'm not sure if it was missed on purpose, but with tests it would
> > be obvious that the format shouldn't ever appear in the core. [8]
> > <https://www.php.net/manual/en/class.datetimeinterface.php> [9]
> > <https://github.com/php/doc-en/pull/2296>
>
> This should instead be fixed of being deprecated. It is a recent
> addition after all.
>
> cheers,
> Derick
>
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