Bug #63940 [Opn]: DateTime->modify(last day of ) not working properly for December

From: Date: Mon, 20 Apr 2015 03:29:54 +0000
Subject: Bug #63940 [Opn]: DateTime->modify(last day of ) not working properly for December
References: 1  Groups: php.bugs 
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Edit report at https://bugs.php.net/bug.php?id=63940&edit=1 ID: 63940 Updated by: pasindu@php.net 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: http://3v4l.org/6PJ9o#v530 Output for hhvm-3.5.0 - 3.6.1 string(10) "2012-12-01" string(10) "2012-12-31" Output for 5.3.6 - 5.6.8, php7@20140507 - 20150401 string(10) "2012-12-31" string(10) "2012-12-31" Output for 5.3.0 - 5.3.5 string(10) "2015-04-30" string(10) "2012-12-31" * 5.3 is eol and seems to work on current versions Previous Comments: ------------------------------------------------------------------------ [2013-01-08 15:37:41] carlos dot jimenez dot guirao at gmail dot com 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. ------------------------------------------------------------------------ [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

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