Bug #52340 [Bgs]: strtotime conversion error

Edit report at http://bugs.php.net/bug.php?id=52340&edit=1 ID: 52340 Updated by: salathe@php.net Reported by: andrea dot romagnoli at getlocal dot it Summary: strtotime conversion error Status: Bogus Type: Bug Package: Date/time related Operating System: Linux PHP Version: 5.3.2 New Comment: The following will return 23 hours. If the result does not equate to your own "day by day" values please provide a similar short script to demonstrate the problem. <?php date_default_timezone_set('Europe/London'); $diff = strtotime('28 March 2010 06:00:00') - strtotime('27 March 2010 06:00:00'); var_dump($diff / 3600); // difference in hours (23) ?> Previous Comments: ------------------------------------------------------------------------ [2010-07-15 11:07:20] andrea dot romagnoli at getlocal dot it Yes, but if I check the difference day by day from 22 march to 29 march is ever of 24H, why the daylight saving is show to me only if I subtract a week? ------------------------------------------------------------------------ [2010-07-15 10:58:18] salathe@php.net The actual number of seconds between those two date/times is expected. This is because it crosses a Daylight Savings boundary (at 2010-03-28T01:00:00+0000). Since the clocks went forward by an hour at that time, the number of seconds between the dates reflects that resulting in a "missing" hour. For more information see http://en.wikipedia.org/wiki/Daylight_saving_time ------------------------------------------------------------------------ [2010-07-15 01:50:18] andrea dot romagnoli at getlocal dot it Description: ------------ The result of subtraction between result of strtotime("Monday 29 March 2010 06:00:00") and the result of strtotime("Monday 22 March 2010 06:00:00") is not a week, but instead is a week less 2,5 minutes... Infact a week are 604800 seconds but the result of this subtraction is 601200. I tried to subtract day per day in the interval and all subtractions are correct and results every time 86400 seconds. Test script: --------------- <?php error_reporting(E_ALL|E_STRICT); date_default_timezone_set ('Europe/London'); $dates = array("Monday 15 March 2010 06:00:00", "Monday 22 March 2010 06:00:00", "Monday 29 March 2010 06:00:00", "Monday 05 April 2010 06:00:00", "Monday 12 April 2010 06:00:00", "Monday 19 April 2010 06:00:00"); var_dump($dates); $datesInt = array(); foreach($dates as $date) $datesInt[] = strtotime($date); $lastDate = $datesInt[0]; for($i = 1; $i < count($datesInt); $i++){ $tmp = $datesInt[$i]-$lastDate; var_dump($tmp); $lastDate = $datesInt[$i]; } ?> Expected result: ---------------- I think that all subtractions should be return 604800 seconds. Actual result: -------------- Actually one of subtractions return 601200 instead of 604800 seconds. ------------------------------------------------------------------------ -- Edit this bug report at http://bugs.php.net/bug.php?id=52340&edit=1