Bug #77788 [Asn->Fbk]: date_add returns invalid time during DST transition
Edit report at https://bugs.php.net/bug.php?id=77788&edit=1
ID: 77788
Updated by: derick@php.net
Reported by: r dot schuil at gmail dot com
Summary: date_add returns invalid time during DST transition
-Status: Assigned
+Status: Feedback
Type: Bug
Package: Date/time related
Operating System: Ubuntu
PHP Version: 7.2.16
Assigned To: derick
Block user comment: N
Private report: N
New Comment:
Thank you for this bug report. To properly diagnose the problem, we
need a short but complete example script to be able to reproduce
this bug ourselves.
A proper reproducing script starts with <?php and ends with ?>,
is max. 10-20 lines long and does not require any external
resources such as databases, etc. If the script requires a
database to demonstrate the issue, please make sure it creates
all necessary tables, stored procedures etc.
Please avoid embedding huge scripts into the report.
I can't reproduce this with PHP 7.2.10, 7.2.35, 7.3.25, nor 8.0.3:
8.0.4-dev derick@gargleblaster:~/dev/php/php-src.git$ php -ddate.timezone=Europe/Berlin
<?php
$date = date_create('2019-01-31 02:00:12');
date_add($date, date_interval_create_from_date_string('2 months'));
echo date_format($date, 'Y-m-d H:i:s');
?>
2019-03-31 03:00:12
Previous Comments:
------------------------------------------------------------------------
[2021-03-28 07:34:48] r dot schuil at gmail dot com
Still not fixed?
------------------------------------------------------------------------
[2019-03-24 09:43:11] r dot schuil at gmail dot com
$ php -r 'echo date_default_timezone_get();
Europe/Berlin
------------------------------------------------------------------------
[2019-03-24 09:37:51] requinix@php.net
What does date_default_timezone_get() return?
------------------------------------------------------------------------
[2019-03-24 09:31:39] r dot schuil at gmail dot com
Description:
------------
When the addition to date/time causes it to be within the hour of DST transition, PHP returns an
invalid date/time.
For example, 2019-01-31 02:00:12 plus two months returns 2019-03-31 02:00:12, which gets rejected by
MySQL because the 3rd hour does not exist on this date. Instead, it should return 2019-03-31
03:00:12
Test script:
---------------
<?php
$date = date_create('2019-01-31 02:00:12');
date_add($date, date_interval_create_from_date_string('2 months'));
echo date_format($date, 'Y-m-d H:i:s');
?>
Expected result:
----------------
2019-03-31 03:00:12
Actual result:
--------------
2019-03-31 02:00:12
------------------------------------------------------------------------
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Edit this bug report at https://bugs.php.net/bug.php?id=77788&edit=1
Thread (7 messages)