Bug #64052 [NEW]: PHP DateTime Add and sub

From: moses dot liao at techlinkz dot net Operating system: Linux PHP version: 5.3.21 Package: Date/time related Bug Type: Bug Bug description:PHP DateTime Add and sub Description: ------------ Using the current datetime, adding and subtracting one month does not result in an actual one month addition and subtraction Test script: --------------- <td valign="top"> <?php $previousMonth = new DateTime ('2013-03-31'); $previousMonth->sub (new DateInterval ('P1M')); echo $previousMonth->format ('Y-m-d'); ?> </td> <td valign="top"> <?php $nextMonth = new DateTime ('2013-03-31'); $nextMonth->add (new DateInterval ('P1M')); echo $nextMonth->format ('Y-m-d'); ?> </td> Expected result: ---------------- previous month to show 2013-02-*, next month to show 2013-04-* Actual result: -------------- <td>2013-03-03</td><td>2013-05-01</td> -- Edit bug report at https://bugs.php.net/bug.php?id=64052&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=64052&r=trysnapshot54 Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=64052&r=trysnapshot53 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=64052&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=64052&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=64052&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=64052&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=64052&r=needscript Try newer version: https://bugs.php.net/fix.php?id=64052&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=64052&r=support Expected behavior: https://bugs.php.net/fix.php?id=64052&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=64052&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=64052&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=64052&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64052&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=64052&r=dst IIS Stability: https://bugs.php.net/fix.php?id=64052&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=64052&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=64052&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=64052&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=64052&r=mysqlcfg