Bug #71530 [NEW]: wrong dateTime diff results for 01.03.2016 and 01.03.2017

From: pawel dot zegardlo at bm dot pl Operating system: windows 8.1 64bit PHP version: 5.6.18 Package: Date/time related Bug Type: Bug Bug description:wrong dateTime diff results for 01.03.2016 and 01.03.2017 Description: ------------ I've tested this on v5.6.15, but in changelog from 5.6.15 to 5.6.18 there is nothing about datetime so this bug seems to be not fixed also in 5.6.18. If we change the month in a sample code from march to april, the result is the same for both comparisons (1 year 0 days 0 months). Also if we change the day in sample code from 01 to 02 and stay with march, the result is also the same. But for original code attached, the result is different but should be also the same. Test script: --------------- <?php $start = new DateTime('01.03.2016'); $end = new DateTime('01.03.2017'); $diff = $end->diff($start); var_dump($start->format('d-m-Y'), $end->format('d-m-Y'), $diff); $start = new DateTime('02.03.2016'); $end = new DateTime('02.03.2017'); $diff = $end->diff($start); var_dump($start->format('d-m-Y'), $end->format('d-m-Y'), $diff); Expected result: ---------------- string '01-03-2016' (length=10) string '01-03-2017' (length=10) object(DateInterval)[3] public 'y' => int 1 public 'm' => int 0 public 'd' => int 0 public 'h' => int 0 public 'i' => int 0 public 's' => int 0 public 'weekday' => int 0 public 'weekday_behavior' => int 0 public 'first_last_day_of' => int 0 public 'invert' => int 1 public 'days' => int 365 public 'special_type' => int 0 public 'special_amount' => int 0 public 'have_weekday_relative' => int 0 public 'have_special_relative' => int 0 string '02-03-2016' (length=10) string '02-03-2017' (length=10) object(DateInterval)[2] public 'y' => int 1 public 'm' => int 0 public 'd' => int 0 public 'h' => int 0 public 'i' => int 0 public 's' => int 0 public 'weekday' => int 0 public 'weekday_behavior' => int 0 public 'first_last_day_of' => int 0 public 'invert' => int 1 public 'days' => int 365 public 'special_type' => int 0 public 'special_amount' => int 0 public 'have_weekday_relative' => int 0 public 'have_special_relative' => int 0 Actual result: -------------- string '01-03-2016' (length=10) string '01-03-2017' (length=10) object(DateInterval)[3] public 'y' => int 0 public 'm' => int 11 public 'd' => int 28 public 'h' => int 0 public 'i' => int 0 public 's' => int 0 public 'weekday' => int 0 public 'weekday_behavior' => int 0 public 'first_last_day_of' => int 0 public 'invert' => int 1 public 'days' => int 365 public 'special_type' => int 0 public 'special_amount' => int 0 public 'have_weekday_relative' => int 0 public 'have_special_relative' => int 0 string '02-03-2016' (length=10) string '02-03-2017' (length=10) object(DateInterval)[2] public 'y' => int 1 public 'm' => int 0 public 'd' => int 0 public 'h' => int 0 public 'i' => int 0 public 's' => int 0 public 'weekday' => int 0 public 'weekday_behavior' => int 0 public 'first_last_day_of' => int 0 public 'invert' => int 1 public 'days' => int 365 public 'special_type' => int 0 public 'special_amount' => int 0 public 'have_weekday_relative' => int 0 public 'have_special_relative' => int 0 -- Edit bug report at https://bugs.php.net/bug.php?id=71530&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=71530&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=71530&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=71530&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=71530&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=71530&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=71530&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=71530&r=needscript Try newer version: https://bugs.php.net/fix.php?id=71530&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=71530&r=support Expected behavior: https://bugs.php.net/fix.php?id=71530&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=71530&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=71530&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=71530&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=71530&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=71530&r=dst IIS Stability: https://bugs.php.net/fix.php?id=71530&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=71530&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=71530&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=71530&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=71530&r=mysqlcfg