Edit report at http://bugs.php.net/bug.php?id=43003&edit=1
ID: 43003
Comment by: jlammertink at gmail dot com
Reported by: post at jefago dot de
Summary: Invalid timezone reported for DateTime objects
constructed using a timestamp
Status: Closed
Type: Bug
Package: Date/time related
Operating System: Debian GNU/Linux
PHP Version: 5.2.4
Assigned To: derick
Block user comment: N
Private report: N
New Comment:
This bug still exists in the latest PHP version (5.3.x). Only way to get
this
right atm is to do it like this:
$dt = new DateTime(time(), new DateTimeZone('UTC'));
$dt->setTimeZone(new DateTimeZone('Europe/Amsterdam'));
Previous Comments:
------------------------------------------------------------------------
[2008-01-17 19:59:03] der...@php.net
This bug has been fixed in CVS.
Snapshots of the sources are packaged every three hours; this change
will be in the next snapshot. You can grab the snapshot at
http://snaps.php.net/.
Thank you for the report, and for helping us make PHP better.
------------------------------------------------------------------------
[2007-10-17 12:30:34] post at jefago dot de
Description:
------------
A DateTime object that is created using a timestamp (with the
"@$iTimestamp" notation) but without a explicitly given time zone (in
the constructor) invalidly reports its time zone as the default time
zone, although its time zone really is UTC. Converting it to the default
time zone corrects this behaviour.
I know that this bug is somewhat similiar to
http://bugs.php.net/bug.php?id=41912, that was marked as "bogus", but I
think the demonstration code makes it clearer that in this case it is
really buggy behaviour.
In fact, the UNIX timestamp is quite clearly defined as "the number of
seconds since 1970-01-01 00:00:00 UTC" and thus it should be time zone
independant.
Reproduce code:
---------------
$oDateTest = new DateTime("@0", new
DateTimeZone(date_default_timezone_get()));
echo "timestamp 0, constructed with default time zone
(".$oDateTest->getTimezone()->getName()."): " .
$oDateTest->format("Y-m-d H:i:s")."<br />";
$oDateTest->setTimezone(new DateTimeZone("UTC"));
echo "timestamp 0, constructed with default time zone, set to
".$oDateTest->getTimezone()->getName()." afterwards: " .
$oDateTest->format("Y-m-d H:i:s")."<br />";
$oDateTest->setTimezone(new DateTimeZone(date_default_timezone_get()));
echo "timestamp 0, constructed with default time zone, then set to UTC
and then to default time zone (".$oDateTest->getTimezone()->getName().")
again: " . $oDateTest->format("Y-m-d H:i:s")."<br />";
$oDateTest = new DateTime("@0");
echo "timestamp 0, constructed with default time zone
(".$oDateTest->getTimezone()->getName()."): " .
$oDateTest->format("Y-m-d H:i:s")."<br />";
$oDateTest->setTimezone( new
DateTimeZone(date_default_timezone_get()));
echo "timestamp 0, constructed with default time zone, explicitly set to
default time zone (".$oDateTest->getTimezone()->getName().") afterwards:
" . $oDateTest->format("Y-m-d H:i:s")."<br />";
Expected result:
----------------
timestamp 0, constructed with default time zone (Europe/Berlin):
1970-01-01 01:00:00
timestamp 0, constructed with default time zone, set to UTC afterwards:
1970-01-01 00:00:00
timestamp 0, constructed with default time zone, then set to UTC and
then to default time zone (Europe/Berlin) again: 1970-01-01 01:00:00
timestamp 0, constructed with default time zone (Europe/Berlin):
1970-01-01 01:00:00
timestamp 0, constructed with default time zone, explicitly set to
default time zone (Europe/Berlin) afterwards: 1970-01-01 01:00:00
Actual result:
--------------
timestamp 0, constructed with default time zone (Europe/Berlin):
1970-01-01 00:00:00 (Either the time zone or the reported time is
WRONG)
timestamp 0, constructed with default time zone, set to UTC afterwards:
1970-01-01 00:00:00
timestamp 0, constructed with default time zone, then set to UTC and
then to default time zone (Europe/Berlin) again: 1970-01-01 01:00:00
timestamp 0, constructed with default time zone (Europe/Berlin):
1970-01-01 00:00:00 (Either the time zone or the reported time is
WRONG)
timestamp 0, constructed with default time zone, explicitly set to
default time zone (Europe/Berlin) afterwards: 1970-01-01 01:00:00
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=43003&edit=1
