Bug #62185 [Com]: strtotime() returns incorrect time around DST (America)

Edit report at https://bugs.php.net/bug.php?id=62185&edit=1 ID: 62185 Comment by: riptide dot tempora at opinehub dot com Reported by: omg00dness at yahoo dot com Summary: strtotime() returns incorrect time around DST (America) Status: Open Type: Bug Package: Date/time related Operating System: Ubuntu PHP Version: 5.3.13 Block user comment: N Private report: N New Comment: Improved test script: <?php date_default_timezone_set('America/Los_Angeles'); echo strtotime("2012-03-11 5:00:00 -1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 5:00:00 -1 hour")) . "\n"; echo strtotime("2012-03-11 4:00:00 -1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 4:00:00 -1 hour")) . "\n"; echo strtotime("2012-03-11 3:00:00 -1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 3:00:00 -1 hour")) . "\n"; echo strtotime("2012-03-11 3:01:00 -1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 3:01:00 -1 hour")) . "\n"; echo strtotime("2012-03-11 2:59:00 -1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 2:59:00 -1 hour")) . "\n"; echo strtotime("2012-03-11 1:00:00 +1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 1:00:00 +1 hour")) . "\n"; echo strtotime("2012-03-11 0:00:00 +1 hour") . "\t"; echo date("M j Y H:i:s I", strtotime("2012-03-11 0:00:00 +1 hour")) . "\n"; ?> My server produced (PHP Version 5.3.13): 1331463600 Mar 11 2012 04:00:00 1 1331460000 Mar 11 2012 03:00:00 1 1331460000 Mar 11 2012 03:00:00 1 1331460060 Mar 11 2012 03:01:00 1 1331459940 Mar 11 2012 01:59:00 0 1331460000 Mar 11 2012 03:00:00 1 1331456400 Mar 11 2012 01:00:00 0 http://www.alpha7f.com/phpt/bug62185.php Previous Comments: ------------------------------------------------------------------------ [2012-05-29 23:07:58] omg00dness at yahoo dot com Description: ------------ For an American timezone (at least those that observe Daylight Savings Time), strtotime() is outputting incorrectly when adding a negative time string. Example uses March 11, 2012 at 2:00am, where the local time jumps instead to 3:00am. Test script: --------------- <?php date_default_timezone_set('America/Los_Angeles'); echo date("M j Y H:i:s I", strtotime("2012-03-11 5:00:00 -1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 4:00:00 -1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 3:00:00 -1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 3:01:00 -1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 2:59:00 -1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 1:00:00 +1 hour")) . "\n"; echo date("M j Y H:i:s I", strtotime("2012-03-11 0:00:00 +1 hour")) . "\n"; ?> Expected result: ---------------- Mar 11 2012 04:00:00 1 Mar 11 2012 03:00:00 1 Mar 11 2012 01:00:00 0 Mar 11 2012 01:01:00 0 Dec 31 1969 16:00:00 0 //Perhaps output false? Mar 11 2012 03:00:00 1 Mar 11 2012 01:00:00 0 Actual result: -------------- Mar 11 2012 04:00:00 1 Mar 11 2012 03:00:00 1 Mar 11 2012 03:00:00 1 Mar 11 2012 03:01:00 1 Mar 11 2012 01:59:00 0 Mar 11 2012 03:00:00 1 Mar 11 2012 01:00:00 0 ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=62185&edit=1