Bug #69916 [Ver]: DateTime and bad behaviour with DateTimeZone
Edit report at https://bugs.php.net/bug.php?id=69916&edit=1
ID: 69916
Updated by: cmb@php.net
Reported by: marcus at onlab dot org
Summary: DateTime and bad behaviour with DateTimeZone
Status: Verified
Type: Bug
Package: Date/time related
-Operating System: osx
+Operating System: *
PHP Version: 5.6.10
Block user comment: N
Private report: N
New Comment:
I just wanted to point out that showing misbehavior by using
deprecated and potentially unsupported timezone identifiers is not
necessarily an indication of a bug.
However, the test script on <http://3v4l.org/1idd6>
clearly shows
a bug. I've simplified this a bit (<http://3v4l.org/ldOMb>), and,
interestingly, when commenting out line 9, the result is as
expected.
The attached patch (timezone-quickfix) is supposed to fix the
issue, but it rather feels like a workaround instead of a
solution.
Previous Comments:
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[2015-06-24 14:32:17] cmb@php.net
The following patch has been added/updated:
Patch Name: timezone-quickfix
Revision: 1435156337
URL: https://bugs.php.net/patch-display.php?bug=69916&patch=timezone-quickfix&revision=1435156337
------------------------------------------------------------------------
[2015-06-24 05:32:17] marcus at onlab dot org
This means that I can't rely on DateTime formats to persist and work with it so PHP should
deprecate this formats and suggest a new one that works, don't you think?
I tested each format and all of them have the same issue
(I can't post all links here due SPAM policy https://gist.github.com/anonymous/c4e4a482220ebe5f2055
)
ATOM http://3v4l.org/1idd6
------------------------------------------------------------------------
[2015-06-24 00:18:51] cmb@php.net
However, the documentation on other timezone identifiers[1] (such
as GMT-3) states:
| Please do not use any of the timezones listed here (besides
| UTC), they only exist for backward compatible reasons.
| If you disregard the above warning, please also note that the
| IANA timezone database that provides PHP's timezone support uses
| POSIX style signs, which results in the Etc/GMT+n and Etc/GMT-n
| time zones being reversed from common usage.
[1] <http://www.php.net/manual/en/timezones.others.php>
------------------------------------------------------------------------
[2015-06-23 23:10:03] requinix@php.net
Your output is backwards: you show the time before you change the timezone.
Not backwards: http://3v4l.org/8Gm26
Switching from GMT-3 to America/Sao_Paulo moves the hour -3 every time but the first.
------------------------------------------------------------------------
[2015-06-23 22:57:59] marcus at onlab dot org
Description:
------------
Reproduced on PHP 5.6.10 (cli) (built: Jun 12 2015 10:07:24) osx Yosemit 10.10.3 Darwin Kernel
Version 14.3.0, and PHP 5.5.23 (cli) (built: Mar 23 2015 01:47:37)
php.ini
date.timezone => UTC => UTC
Reproduced on Amazon machines: PHP 5.6.10-1+deb.sury.org~trusty+1 (cli)
Test script:
---------------
More cases: https://gist.github.com/onlab/71a863feed01f79e7b7a
$baseDate = \DateTime::createFromFormat(\DateTime::ISO8601, '2015-06-23T18:00:00-0300');
echo '----- Everything works fine here -----' . PHP_EOL;
echo "SET America/Sao_Paulo \t" . $baseDate->format(\DateTime::ISO8601) . PHP_EOL;
$baseDate->setTimezone(new \DateTimeZone('America/Sao_Paulo'));
echo "SET GMT-3 \t\t" . $baseDate->format(\DateTime::ISO8601) . PHP_EOL;
$baseDate->setTimezone(new \DateTimeZone('GMT-3'));
echo "SET America/Sao_Paulo \t" . $baseDate->format(\DateTime::ISO8601) . PHP_EOL;
$baseDate->setTimezone(new \DateTimeZone('America/Sao_Paulo'));
echo '----- Time will be changed -3 hours (bug) -----' . PHP_EOL;
echo "SET America/Sao_Paulo \t" . $baseDate->format(\DateTime::ISO8601) . PHP_EOL;
$baseDate->setTimezone(new \DateTimeZone('America/Sao_Paulo'));
echo '----- Everything works fine here -----' . PHP_EOL;
echo "SET GMT-3 \t\t" . $baseDate->format(\DateTime::ISO8601) . PHP_EOL;
$baseDate->setTimezone(new \DateTimeZone('GMT-3'));
Expected result:
----------------
Regardless of the timezone I'm using, both represents GMT-3. So the result should be the below
result in any result:
2015-06-23T18:00:00-0300
Actual result:
--------------
----- Everything works fine here -----
SET America/Sao_Paulo 2015-06-23T18:00:00-0300
SET GMT-3 2015-06-23T18:00:00-0300
SET America/Sao_Paulo 2015-06-23T18:00:00-0300
----- Time will be changed -3 hours (bug) -----
SET America/Sao_Paulo 2015-06-23T15:00:00-0300
----- Everything works fine here -----
SET GMT-3 2015-06-23T15:00:00-0300
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Edit this bug report at https://bugs.php.net/bug.php?id=69916&edit=1
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