//
I am trying to calculate the number of days between dates and have a major problem. When I try the example below, it gives me exactly 201 days, yet the dates have different times, meaning that a full day is impossible. If it matters, I am testing via xampp 1.7.3 with php version 5.3.1 with Windows XP. Can anyone explain what I am doing wrong. Can daylight savings play a role?

$frmritedate7116 = strtotime('2010-12-13 23:00');
$frmritedate7156 = strtotime('2010-05-27 00:00');
//
$frmritedate7251 = $frmritedate7156 - $frmritedate7116;
//
//
1274943600-1292310000=-17366400 // 86400 seconds in a day ( 201.00 )
//
//
//

Hi! This is due DST.
Just take a look in this example:
vlado@testing-pc:~$ php -r 'date_default_timezone_set("UTC"); echo ((strtotime("2010-12-13 23:00") - strtotime("2010-05-27 00:00"))/ 86400).chr(10);'
200.95833333333
vlado@testing-pc:~$ php -r 'date_default_timezone_set("Europe/Sofia"); echo ((strtotime("2010-12-13 23:00") - strtotime("2010-05-27 00:00"))/ 86400).chr(10);'
201
vlado@testing-pc:~$

Take a look at this article I wrote before, it should fix your needs.

http://omfgitsasalmon.posterous.com/...dnt-know-exist