Bug #72255 [NEW]: DST-handling in DatePeriod on transition back is buggy

From: heiglandreas Operating system: Irrelevant PHP version: Irrelevant Package: Date/time related Bug Type: Bug Bug description:DST-handling in DatePeriod on transition back is buggy Description: ------------ Handling the transition back from DST to default time is buggy in DatePeriod. The extra hour is not showing when iterating over a DatePeriod covering the transition back from DST to default time. See https://gist.github.com/heiglandreas/7b7fc82471f4619f66f329a31b566112 and https://3v4l.org/2aDp3 for code-examples. Test script: --------------- <?php $interval = new DateInterval('PT1H'); // DST change in Europe is on the 30. October 2016 $dateTimeStart = new DateTimeImmutable('2016-10-30 01:30:00', new DateTimezone('Europe/Berlin')); $dateTimeEnd = new DateTimeImmutable('2016-10-30 03:31:00', new DateTimezone('Europe/Berlin')); $period = new DatePeriod($dateTimeStart, $interval, $dateTimeEnd); foreach ($period as $date) { echo $date->format('c') . "\n"; } Expected result: ---------------- 2016-10-30T01:30:00+02:00 2016-10-30T02:30:00+02:00 2016-10-30T02:30:00+01:00 2016-10-30T03:30:00+01:00 Actual result: -------------- 2016-10-30T01:30:00+02:00 2016-10-30T02:30:00+01:00 2016-10-30T03:30:00+01:00 -- Edit bug report at https://bugs.php.net/bug.php?id=72255&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=72255&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=72255&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=72255&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=72255&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=72255&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=72255&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=72255&r=needscript Try newer version: https://bugs.php.net/fix.php?id=72255&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=72255&r=support Expected behavior: https://bugs.php.net/fix.php?id=72255&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=72255&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=72255&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=72255&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=72255&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=72255&r=dst IIS Stability: https://bugs.php.net/fix.php?id=72255&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=72255&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=72255&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=72255&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=72255&r=mysqlcfg