Edit report at https://bugs.php.net/bug.php?id=51051&edit=1
ID: 51051
Comment by: joerg dot eichhorn at kiwigrid dot com
Reported by: mehdi dot rande at aliasource dot fr
Summary: DateTime modify wrong result with DST change
Status: Assigned
Type: Bug
Package: Date/time related
Operating System: Linux
PHP Version: 5.3.1
Assigned To: derick
Block user comment: N
Private report: N
New Comment:
Still present with:
PHP 5.4.7 (cli) (built: Sep 12 2012 23:48:31)
Copyright (c) 1997-2012 The PHP Group
My former test script still shows the error:
<?php
$dt = new DateTime('now', new DateTimeZone('Europe/Berlin'));
// try to set timestamp of 2010-10-31T02:00:00+0200
$dt->setTimestamp(1288483200);
echo "Expected: 1288483200\n";
// but returns timestamp of 2010-10-31T02:00:00+0100
echo "Actual : ".$dt->getTimestamp()."\n"; // outputs 1288486800
?>
Any Ideas when this issue is going to be fixed? It's a serious issue that it
returns another timestamp than what was set!
Previous Comments:
------------------------------------------------------------------------
[2013-03-19 18:09:02] kavi at postpro dot net
This is still broken in 5.3.21, according to danielc's test.
$ php --version
PHP 5.3.21 (cli) (built: Jan 17 2013 12:34:34)
Copyright (c) 1997-2013 The PHP Group
Zend Engine v2.3.0, Copyright (c) 1998-2013 Zend Technologies
$ php derp.php
SPRING INTERVALS (add okay, sub does not change hour)
2010-03-14T01:59:59-05:00 America/New_York EST 0 1268549999
Adding interval: PT1S
2010-03-14T03:00:00-04:00 America/New_York EDT 1 1268550000
Subtracting interval: PT1S
2010-03-14T03:59:59-04:00 America/New_York EDT 1 1268553599
SPRING TIMESTAMPS (works as expected)
2010-03-14T01:59:59-05:00 America/New_York EST 0 1268549999
Adding seconds: 1
2010-03-14T03:00:00-04:00 America/New_York EDT 1 1268550000
Subtracting seconds: 1
2010-03-14T01:59:59-05:00 America/New_York EST 0 1268549999
FALL INTERVALS (add and sub skip the 1am - 2am redo)
2010-11-07T00:59:59-04:00 America/New_York EDT 1 1289105999
Adding interval: PT1H
2010-11-07T01:59:59-04:00 America/New_York EDT 1 1289109599
Adding interval: PT1S
2010-11-07T02:00:00-05:00 America/New_York EST 0 1289113200
Subtracting interval: PT1S
2010-11-07T01:59:59-04:00 America/New_York EDT 1 1289109599
FALL TIMESTAMPS (works as expected)
2010-11-07T00:59:59-04:00 America/New_York EDT 1 1289105999
Adding seconds: 3600
2010-11-07T01:59:59-04:00 America/New_York EDT 1 1289109599
Adding seconds: 1
2010-11-07T01:00:00-05:00 America/New_York EST 0 1289109600
Adding seconds: 3600
2010-11-07T02:00:00-05:00 America/New_York EST 0 1289113200
Subtracting seconds: 1
2010-11-07T01:59:59-05:00 America/New_York EST 0 1289113199
------------------------------------------------------------------------
[2012-05-17 00:12:04] kavi at postpro dot net
See also:
https://bugs.php.net/bug.php?id=60960
https://bugs.php.net/bug.php?id=61530
https://bugs.php.net/bug.php?id=52480
Quoting https://wiki.php.net/rfc/datetime_and_daylight_saving_time -- "Getting
these issues straightened out before 5.4 goes into Release Candidate status
seems
wise."
------------------------------------------------------------------------
[2012-03-14 14:36:41] webmaster at martinandersson dot com
DateTime::diff get's it wrong in PHP 5.4. Tested on Apache (with PHP 5.4 VC9) /
Windows 7 x64. Code of horror:
$d1 = new DateTime("2011-10-30 01:05:00", new DateTimeZone("Europe/Stockholm"));
$d2 = new DateTime("2011-10-30 03:05:00", new DateTimeZone("Europe/Stockholm"));
$di = $d1->diff($d2);
echo $di->h;
This produces '2' whereas it should have said '3' because in this timezone and
interval (more precisly 03:00:00), all Swedes turned their clock back 1 hour.
Still, the internal logic of PHP 5.4 knows about the different offsets:
echo $d1->getOffset() / (60 * 60);
Prints '2'.
echo $d2->getOffset() / (60 * 60);
Prints '1'.
A direct calculation with UNIX timestamps produces the correct result:
$hoursofdiff = ($d2->getTimeStamp() - $d1->getTimeStamp()) / 60 / 60;
echo "Calculated difference in hours: $hoursofdiff";
Prints '3'.
This issue has been further elaborated here:
http://stackoverflow.com/questions/9695870/phps-datetimediff-gets-it-wrong
------------------------------------------------------------------------
[2011-11-21 02:43:15] [email protected]
This will be addressed by
https://wiki.php.net/rfc/datetime_and_daylight_saving_time
------------------------------------------------------------------------
[2011-04-18 17:30:09] halde at freenet dot de
reproduced issue of previous poster on a linux machine (timestamps are not
equal):
$ php -a
Interactive shell
php > $dt = new DateTime('now', new DateTimeZone('Europe/Berlin'));
php > $dt->setTimestamp(1288483200);
php > echo $dt->getTimestamp();
1288486800
php > echo phpversion();
5.3.3-1ubuntu9.3
php > exit
$ uname -a
Linux wum128229 2.6.35-28-generic #49-Ubuntu SMP Tue Mar 1 14:39:03 UTC 2011
x86_64 GNU/Linux
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