Bug #69943 [NEW]: DateTime::add() and sub() doesn't account for TZ transitions

From: kernins at gmail dot com Operating system: Linux PHP version: 5.6.10 Package: Date/time related Bug Type: Bug Bug description:DateTime::add() and sub() doesn't account for TZ transitions Description: ------------ See the snippet http://3v4l.org/YgUIV diff() behaves correctly, but add/sub - not. PHP 5.4.34-5.4.42 and 5.5.18-5.6.10 are affected As for older versions showing 1 hour difference - does php use its own bundled tzdata instead of system one? It may explain The dates in example are around latest Europe/Moscow transition from +04:00 to +03:00 happened at 2014-10-25T22:00:00 UTC (01:59:59+04:00 + 1sec -> 01:00:00+03:00) Test script: --------------- $tz=new DateTimeZone('Europe/Moscow'); $d1=new DateTime('2014-10-26T00:59:59', $tz); $d2=new DateTime('2014-10-26T01:59:59', $tz); var_dump($d2->diff($d1, true)->h); var_dump($d1->add($int=new DateInterval('PT2H'))->format(DateTime::ISO8601), $d2->sub($int)->format(DateTime::ISO8601)); Expected result: ---------------- Consistent add/sub results assuming 2hrs difference between test dates 2014-10-26T01:59:59+0300 for add() 2014-10-26T00:59:59+0400 for sub() Actual result: -------------- http://3v4l.org/YgUIV diff=2 2014-10-26T02:59:59+0300 2014-10-25T23:59:59+0400 -- Edit bug report at https://bugs.php.net/bug.php?id=69943&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=69943&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=69943&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=69943&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=69943&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=69943&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=69943&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=69943&r=needscript Try newer version: https://bugs.php.net/fix.php?id=69943&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=69943&r=support Expected behavior: https://bugs.php.net/fix.php?id=69943&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=69943&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=69943&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=69943&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=69943&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=69943&r=dst IIS Stability: https://bugs.php.net/fix.php?id=69943&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=69943&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=69943&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=69943&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=69943&r=mysqlcfg