#45661 [Opn->Bgs]: Error in mktime when omitting day

ID: 45661 Updated by: derick@php.net Reported By: frozenfire at thefrozenfire dot com -Status: Open +Status: Bogus Bug Type: Date/time related Operating System: Windows XP SP2 PHP Version: 5.2.6 New Comment: Please do not submit the same bug more than once. An existing bug report already describes this very problem. Even if you feel that your issue is somewhat different, the resolution is likely to be the same. Thank you for your interest in PHP. http://bugs.php.net/bug.php?id=11212 http://bugs.php.net/bug.php?id=44073 http://bugs.php.net/bug.php?id=44577 http://bugs.php.net/bug.php?id=43169 http://bugs.php.net/bug.php?id=41386 http://bugs.php.net/bug.php?id=38279 Previous Comments: ------------------------------------------------------------------------ [2008-07-31 01:21:55] frozenfire at thefrozenfire dot com // Working code. Produces intuitive output. // Original bug report used 0 as 5th param for($i=1; $i<13; $i++) echo date('M', mktime(0, 0, 0, $i, 1))."\n"; ------------------------------------------------------------------------ [2008-07-31 00:47:56] frozenfire at thefrozenfire dot com Description: ------------ There is a bug in mktime, where omission of the day parameter causes some issues. Most notably, when attempting to iterate through months. See the reproduction code for a better explanation. Reproduce code: --------------- // Bugged code. Produces "Mar" twice. for($i=1; $i<13; $i++) echo date('M', mktime(0, 0, 0, $i))."\n"; // Working code. Produces intuitive output. for($i=1; $i<13; $i++) echo date('M', mktime(0, 0, 0, $i, 0))."\n"; Expected result: ---------------- Jan Feb Mar Apr Jun Jul Aug Sep Oct Nov Dec Actual result: -------------- Jan Mar Mar Apr Jun Jul Aug Sep Oct Nov Dec ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/?id=45661&edit=1