Date-related rules are not working today

[henriquemoody]

This is probably an issue with PHP, not with the library itself. I can't wrap my head around it:

echo DateTime::createFromFormat('Ym', '202302')->format('Ym');
// Outputs 202303

I will create a commit to let the test pass for now, and I will get back to it whenever I can.

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Another similar issue: https://github.com/henriquemoody/Validation/actions/runs/8103265516/job/22147529888

[reima]

This is caused by a combination of two non-intuitive behaviors of DateTime::createFromFormat:

• Missing fields are initialized with the current date/time
• Out of range values trigger overflow behavior to produce a valid date

This means that DateTime::createFromFormat('Ym', '202302') will use the current day of the month, e.g. the parsed date will be 2023-02-31 on January 31st. The overflow behavior "corrects" this to 2023-03-03.

Prefixing the format string with "!" will set missing fields to sensible, fixed default values (i.e. 1 for the day).

[henriquemoody]

Thank you for such detailed answer, @reima!