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Doc Bug #64908 DateTime's constructor accepts time that not exists because of DST
Submitted: 2013-05-23 08:30 UTC Modified: 2013-05-23 18:39 UTC
Votes:1
Avg. Score:3.0 ± 0.0
Reproduced:0 of 0 (0.0%)
From: istvan dot dani at gmail dot com Assigned: aharvey (profile)
Status: Closed Package: Documentation problem
PHP Version: Irrelevant OS: OS X 10.8
Private report: No CVE-ID: None
View Developer Edit
 [2013-05-23 08:30 UTC] istvan dot dani at gmail dot com 
Description:
------------
Europe/Budapest timezone offset is +1, and +2 in DST.
Transition to DST is at 2013-03-31 01:00:00 UTC/GMT.
According to this, locale time should not exists between 02:00:00 and 03:00:00,
and must not be accepted as valid time.

Test script:
---------------
try {
   $wrong_date = new DateTime("2013-03-31 02:30:00", new DateTimeZone("Europe/Budapest"));
} catch (Exception $e) {
   echo $e->getMessage();
}
print "Wrong date in local timezone: " . $wrong_date->format("Y-m-d H:i:s");
$wrong_date->setTimezone(new DateTimeZone("UTC"));
print "<br />Converting to UTC: " . $wrong_date->format("Y-m-d H:i:s");
$wrong_date->setTimezone(new DateTimeZone("Europe/Budapest"));
print "<br />Converting back to locale timezone: " . $wrong_date->format("Y-m-d H:i:s");


Expected result:
----------------
Get an exception.

Actual result:
--------------
Wrong date in local timezone: 2013-03-31 02:30:00
Converting to UTC: 2013-03-31 01:30:00
Converting back to locale timezone: 2013-03-31 03:30:00

Patches

Pull Requests

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 [2013-05-23 17:22 UTC] derick@php.net
-Status: Open +Status: Not a bug
 [2013-05-23 17:22 UTC] derick@php.net 
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php

PHP's date time handling auto-corrects wrong date/time values. This is similar to doing:

<?php
$n = new DateTime("2013-04-31");
var_dump( $n );
?>

class DateTime#1 (3) {
  public $date =>
  string(19) "2013-05-01 00:00:00"
  public $timezone_type =>
  int(3)
  public $timezone =>
  string(13) "Europe/London"
}
 [2013-05-23 18:17 UTC] istvan dot dani at gmail dot com 
Yep. Manual at http://hu1.php.net/manual/en/datetime.construct.php says:
"If an invalid date is specified, then an exception is now thrown. Previously an 
error was emitted."
 [2013-05-23 18:29 UTC] derick@php.net
-Package: Date/time related +Package: Documentation problem
 [2013-05-23 18:29 UTC] derick@php.net 
That's wrong, it should say "invalid date *format*". Marking this as a doc issue.
 [2013-05-23 18:31 UTC] aharvey@php.net
-Status: Not a bug +Status: Assigned -Assigned To: +Assigned To: aharvey
 [2013-05-23 18:31 UTC] aharvey@php.net 
Reopening.
 [2013-05-23 18:38 UTC] aharvey@php.net 
Automatic comment from SVN on behalf of aharvey
Revision: http://svn.php.net/viewvc/?view=revision&amp;revision=330341
Log: Make DateTime::__construct()'s changelog clearer on the point that exceptions
are thrown if the date format is invalid, rather than the date itself.

Fixes doc bug #64908 (DateTime's constructor accepts time that not exists
because of DST).
 [2013-05-23 18:39 UTC] aharvey@php.net
-Status: Assigned +Status: Closed -Type: Bug +Type: Documentation Problem
 [2013-05-23 18:39 UTC] aharvey@php.net 
This bug has been fixed in the documentation's XML sources. Since the
online and downloadable versions of the documentation need some time
to get updated, we would like to ask you to be a bit patient.

Thank you for the report, and for helping us make our documentation better.
 
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