Edit report at https://bugs.php.net/bug.php?id=63940&edit=1
ID: 63940 Comment by: carlos dot jimenez dot guirao at gmail dot com Reported by: carlos dot jimene dot guirao at gmail dot com Summary: DateTime->modify(last day of ) not working properly for December Status: Open Type: Bug Package: Date/time related Operating System: Ubuntu 10.04.4 LTS PHP Version: 5.3.20 Block user comment: N Private report: N New Comment: In php version PHP 5.4.6 OS: Ubuntu 12.10 Same script outputs: string(10) "2012-12-31" string(10) "2012-12-31" Results working as expected. Previous Comments: ------------------------------------------------------------------------ [2013-01-08 15:32:24] carlos dot jimene dot guirao at gmail dot com Description: ------------ Working with DateTime object as shown on manual. If you modify a DateTime object using this relative format "last day of December Year" it fails giving instead last day of next January. It seems that it was corrected when used in DateTime Constructor instead. So if you create DateTime object using same string in constructor it works. Test script: --------------- $datetime = new DateTime(); $datetime->modify('last day of December 2012'); var_dump($datetime->format('Y-m-d')); $anotherdt = new DateTime('last day of December 2012'); var_dump($anotherdt->format('Y-m-d')); Expected result: ---------------- string(10) "2012-12-31" string(10) "2012-12-31" Actual result: -------------- string(10) "2013-01-31" string(10) "2012-12-31" ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=63940&edit=1