Bug->Doc #52143 [Opn]: strtotime() unexpectedly changed from 5.2.13 to 5.3.2 breaking alot of scripts

Edit report at https://bugs.php.net/bug.php?id=52143&edit=1 ID: 52143 Updated by: aharvey@php.net Reported by: jason dot woods at blueyonder dot co dot uk Summary: strtotime() unexpectedly changed from 5.2.13 to 5.3.2 breaking alot of scripts Status: Open -Type: Bug +Type: Documentation Problem -Package: Date/time related +Package: Documentation problem Operating System: CentOS 5.5 x86_64 PHP Version: 5.3.2 Block user comment: N Private report: N New Comment: This was meant to be a documentation problem, I gather. Changing the bug type to get it on the doc team radar. @sonnenberg: I'd suggest hitting up one of the many support channels available for PHP. The bug tracker isn't a support forum, and your issue isn't particularly related to this bug (short version: ISO week numbers don't work the way you necessarily expect in terms of the last week of the year). Previous Comments: ------------------------------------------------------------------------ [2012-12-08 16:19:49] sonnenberg at gmail dot com I have a similar problem, but I'm calculating with weeks and am getting inconsistent results. Test script: ------------ <?php echo strftime("%Y %W", strtotime("-1 week", strtotime("2013W01"))) . "\n"; echo strftime("%Y %W", strtotime("+1 week", strtotime("2012W52"))) . "\n"; echo gmdate("Y W", strtotime("2012W53")) . "\n"; echo strftime("%Y %W", strtotime("2012W53")) . "\n"; echo date("Y W", strtotime("2012W53")) . "\n"; ?> Expected result: ---------------- 2012 53 2012 53 2012 53 2012 53 2012 53 Actual result: -------------- 2012 52 2012 53 2012 52 2012 53 2012 01 - this one is particulary interesting... I've tried different timezones, but that does not seem to affect this issue as I get the same output for all timezones. php version: ------------ PHP 5.3.10-1ubuntu3.4 with Suhosin-Patch (cli) (built: Sep 12 2012 18:59:41) Copyright (c) 1997-2012 The PHP Group Zend Engine v2.3.0, Copyright (c) 1998-2012 Zend Technologies with Xdebug v2.2.1, Copyright (c) 2002-2012, by Derick Rethans ------------------------------------------------------------------------ [2010-09-27 10:49:30] derick@php.net The new behaviour is correct; this was a bug fix. ------------------------------------------------------------------------ [2010-09-24 02:57:19] kkcagg at gmail dot com Bug also shows up in PHP version 5.3.3. It seems to be normalizing the value to the Monday of the target week. For example: strtotime('next week') would be equivalent to strtotime('Monday next week') instead of the expected value of the current time plus the number of seconds in a week. ------------------------------------------------------------------------ [2010-06-22 13:01:38] jason dot woods at blueyonder dot co dot uk Description: ------------ In version 5.2.13 the following code: <?php echo ($now = strtotime('+1 day')) . ' - ' . date('d-m-Y H.i.s', $now) . "\n"; echo ($last = strtotime('last week', $now)) . ' - ' . date('d-m-Y H.i.s', $last) . "\n"; echo ($next = strtotime('+1 week', $last)) . ' - ' . date('d-m-Y H.i.s', $next) . "\n"; ?> Gives the following result: 1277283067 - 23-06-2010 09.51.07 1276678267 - 16-06-2010 09.51.07 1277283067 - 23-06-2010 09.51.07 That is, first line is current time. Second time is "last week", otherwise known as "-1 week". Third time is "+1 week", which reverses the change that the "-1 week" did. However, this changed in 5.3.2 and it now gives the following result: 1277281904 - 23-06-2010 09.31.44 1276504304 - 14-06-2010 09.31.44 1277109104 - 21-06-2010 09.31.44 So it appears "last week" is no longer the equivalent of "-1 week". Is this a deliberate change or something that was broken in 5.3.2? I have been unable to test other versions and can only give you the difference from 5.2.13 and 5.3.2. Thanks. Test script: --------------- <?php echo ($now = strtotime('+1 day')) . ' - ' . date('d-m-Y H.i.s', $now) . "\n"; echo ($last = strtotime('last week', $now)) . ' - ' . date('d-m-Y H.i.s', $last) . "\n"; echo ($next = strtotime('+1 week', $last)) . ' - ' . date('d-m-Y H.i.s', $next) . "\n"; ?> Expected result: ---------------- 1277283067 - 23-06-2010 09.51.07 1276678267 - 16-06-2010 09.51.07 1277283067 - 23-06-2010 09.51.07 Actual result: -------------- 1277281904 - 23-06-2010 09.31.44 1276504304 - 14-06-2010 09.31.44 1277109104 - 21-06-2010 09.31.44 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=52143&edit=1