From: energie at eox dot hu
Operating system: linux/windows
PHP version: 5.2.9
PHP Bug Type: Date/time related
Bug description: date_timezone_set function produces wrong datetime result
Description:
------------
Result of "date_create" with timezon given:
"Mon, 23 May 1955 00:00:00 +0200"
After calling "date_timezone_set" for this date the expected result would
be the same but instead the result is:
"Mon, 23 May 1955 01:00:00 +0200"
In case of "Europe/Budapest" timezone 3 dates are affected between
1900.01.01 and 1999.12.31:
[0] => Sun, 23 May 1954 00:00:00 +0200
[0] => Mon, 23 May 1955 00:00:00 +0200
[0] => Sun, 03 Jun 1956 00:00:00 +0200
There are timezones where everything works fine, and many ohters that have
date inputs that cause this mis-calculation. Thers is no relation between
the dates in different timezones but the wrong dates are always the same in
a given timezone, so there are no "random" errors.
Reproduce code:
---------------
$errors = array();
$timezones = array('Europe/Budapest');
// Uncomment the following line to run on all timezones
// $timezones = timezone_identifiers_list();
function generate_dates($timezone) {
$dates = array();
for($y = 1900; $y <= 1999; $y++) {
for($m = 1; $m <= 12; $m++) {
for($d = 1; $d <= 31; $d++) {
$date = date_create(sprintf('%s-%s-%s 00:00:00', $y, $m, $d),
timezone_open($timezone));
if ($date) {
$dates[] = $date;
}
}
}
}
return $dates;
}
foreach($timezones as $timezone) {
$dates = generate_dates($timezone);
foreach($dates as $date) {
$test = date_format($date, 'r');
date_timezone_set($date, timezone_open($timezone));
if ($test != date_format($date, 'r')) {
$errors[$timezone][] = array($test, date_format($date, 'r'));
}
}
print('Timezone: '. $timezone . ', errors: '. count($errors[$timezone])
. "\n");
// Uncomment the following line to display all dates that calculated
"wrong"
// print_r($errors[$timezone]);
// print "\n";
}
Expected result:
----------------
Timezone: Europe/Budapest, errors: 0
Actual result:
--------------
Timezone: Europe/Budapest, errors: 3
--
Edit bug report at http://bugs.php.net/?id=48097&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=48097&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=48097&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=48097&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=48097&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=48097&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=48097&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=48097&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=48097&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=48097&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=48097&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=48097&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=48097&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=48097&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=48097&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=48097&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=48097&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=48097&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=48097&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=48097&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=48097&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=48097&r=mysqlcfg
