From:
Operating system: Linux
PHP version: 5.2.13
Package: Date/time related
Bug Type: Bug
Bug description:timelib_timezone_lookup has invalid DST entries, breaks strtotime
Description:
------------
It seems timezonemap.h was generated by a tzdata parser that unfortunately
did not include information on the years Daylight Saving Time was in use.
In particular, in South Korea, there is no DST, yet there exists KST/KDT
distinction in strtotime that thinks KDT is currently active, with
inconsistencies with other date/time functions.
Test script:
---------------
<?php
function tzconvert ($input, $timezone)
{
$ts = strtotime ($input);
$time = gmdate ('r', $ts);
$dt = new DateTime ($time);
$dt->setTimeZone (new DateTimeZone ($timezone));
echo "Input: $time\nConverted: " . $dt->format ('l, M d g:ia T') .
"\n";
}
tzconvert ("Thursday, April 15 2010 12:00am EDT", "KST");
tzconvert ("Thursday, April 15 2010 12:00am EDT", "KDT");
tzconvert ("Thursday, Apr 15 1:00pm KST", "EDT");
tzconvert ("Thursday, Apr 15 1:00pm KDT", "EDT");
?>
Expected result:
----------------
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 1:00pm KST
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 1:00pm KST
Input: Thu, 15 Apr 2010 05:00:00 +0000
Converted: Thursday, Apr 15 1:00am EDT
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 12:00am EDT
Actual result:
--------------
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 1:00pm KST
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 1:00pm KST
Input: Thu, 15 Apr 2010 05:00:00 +0000
Converted: Thursday, Apr 15 1:00am EDT
Input: Thu, 15 Apr 2010 04:00:00 +0000
Converted: Thursday, Apr 15 1:00am EDT
--
Edit bug report at http://bugs.php.net/bug.php?id=51557&edit=1
--
Try a snapshot (PHP 5.2): http://bugs.php.net/fix.php?id=51557&r=trysnapshot52
Try a snapshot (PHP 5.3): http://bugs.php.net/fix.php?id=51557&r=trysnapshot53
Try a snapshot (PHP 6.0): http://bugs.php.net/fix.php?id=51557&r=trysnapshot60
Fixed in SVN: http://bugs.php.net/fix.php?id=51557&r=fixed
Fixed in SVN and need be documented: http://bugs.php.net/fix.php?id=51557&r=needdocs
Fixed in release: http://bugs.php.net/fix.php?id=51557&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=51557&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=51557&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=51557&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=51557&r=support
Expected behavior: http://bugs.php.net/fix.php?id=51557&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=51557&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=51557&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=51557&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=51557&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=51557&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=51557&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=51557&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=51557&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=51557&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=51557&r=mysqlcfg