PHP :: Doc Bug #80022 :: Inconsistency DateTimeInterface::ISO8601

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In https://www.php.net/manual/en/class.datetime.php we have const string DateTimeInterface::ISO8601 = "Y-m-d\TH:i:sO" ; The format 0 = Difference to Greenwich time (GMT) without colon between hours and minutes Example: +0200 ( https://www.php.net/manual/en/datetime.format.php ) But the format('c') full date/time define: c ISO 8601 date (added in PHP 5) 2004-02-12T15:19:21+00:00 We can to see that the format is inconsistency, format "c" is not equal to Y-m-d\TH:i:sO it would be 2004-02-12T15:19:21+0000

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[2020-08-26 23:12 UTC] requinix@php.net -Status: Open +Status: Feedback -Package: Documentation problem +Package: Date/time related

[2020-08-26 23:12 UTC] requinix@php.net

That's right, 'O' does not have a colon while the timezone offset in 'c' does.
What bug are you reporting?

[2020-08-27 06:51 UTC] pablo at antweb dot es -Status: Feedback +Status: Open

[2020-08-27 06:51 UTC] pablo at antweb dot es

Correctly. 
This is the inconsistency.
Format "c" is a ISO 8601 date and have colon, and DateTimeInterface:ISO8601 = "Y-m-d\TH:i:sO" but does not have colon...

[2020-08-27 06:55 UTC] requinix@php.net -Status: Open +Status: Not a bug

[2020-08-27 06:55 UTC] requinix@php.net

https://www.php.net/manual/en/class.datetimeinterface.php#datetime.constants.types
> Note: This format is not compatible with ISO-8601, but is left this way for
> backward compatibility reasons. Use DateTime::ATOM or DATE_ATOM for
> compatibility with ISO-8601 instead.

[2020-08-27 06:57 UTC] pablo at antweb dot es

Amazing!
Mystery solved ... thank you.

[2022-07-22 14:37 UTC] git@php.net

Automatic comment on behalf of derickr
Revision: https://github.com/php/php-src/commit/6ae86c235820aaacfd6f7208fb54cb58212a3fac
Log: Fixed bug #80022: Support ISO 8601 years outside 0000-9999 range better

[2022-07-22 14:37 UTC] git@php.net -Status: Not a bug +Status: Closed