note 111371 added to function.mktime

To calculate the number of days between two dates, do not take the integer part of the difference is due to the transition to daylight saving time. We must take rounding: <?php function dateDiff($start, $end) { $start_ts = strtotime($start); $end_ts = strtotime($end); $diff = $end_ts - $start_ts; return round($diff / 86400); } ?> If you use the floor() instead of round() function, the result will be one day less if the start date is before the summer time date and the end date between the summer time date and the winter time date. This is due to the fact that the summer time date is one hour less. ---- Server IP: 69.147.83.199 Probable Submitter: 88.163.122.30 ---- Manual Page -- http://php.net/manual/en/function.mktime.php Edit -- https://master.php.net/note/edit/111371 Del: integrated -- https://master.php.net/note/delete/111371/integrated Del: useless -- https://master.php.net/note/delete/111371/useless Del: bad code -- https://master.php.net/note/delete/111371/bad+code Del: spam -- https://master.php.net/note/delete/111371/spam Del: non-english -- https://master.php.net/note/delete/111371/non-english Del: in docs -- https://master.php.net/note/delete/111371/in+docs Del: other reasons-- https://master.php.net/note/delete/111371 Reject -- https://master.php.net/note/reject/111371 Search -- https://master.php.net/manage/user-notes.php