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Date: Wed, 11 Dec 2013 18:02:54 +0800
Message-ID: <CAHMUw2HewKT9Sc1-SUGOdC65fzs40mcy_gzn-z=LQ=ZdwitBOQ@mail.gmail.com>
To: Nikita Nefedov <inefedor@gmail.com>
Cc: "internals@lists.php.net" <internals@lists.php.net>
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Subject: Re: [PHP-DEV] timelib diff working wrong on with years
From: tjerk.meesters@gmail.com (Tjerk Meesters)

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On Wed, Dec 11, 2013 at 5:38 PM, Nikita Nefedov <inefedor@gmail.com> wrote:

> Hi,
>
> today I stumbled upon this bug, but I actually don't know should I call it
> bug or is it right behavior?
>
> So for example lets get diff between 2013-10-25 and 2014-10-25:
> var_dump((new DateTime("2013-03-25"))->diff(new DateTime("2014-03-25")))
>
> We'll get one full year.
>
> Then if we try to get diff between 2012-03-25 and 2013-03-25 we'll also
> get one year.
>
> But if we have 2012-03-01 and 2013-03-01 then we get 11 months and 30 days
> (365 in int->days member)...
>

It gets interesting when you look one day around it:

2012-02-28 -> 2013-02-28 = 366 total, 1 year
2012-02-29 -> 2013-03-01 = 366 total, 1 year
2012-03-01 -> 2013-03-01 = 365 total, 11 months, 30 days
2013-03-02 -> 2013-03-02 = 365 total, 1 year



>
> Should we consider this as a bug or not?


Seems like it; the total days is correct in all cases, but the breakdown
doesn't look right.


>
>
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