note 126658 added to class.dateinterval

If you want to reverse a date interval use array_reverse and iterator_to_array. I've found using invert to be unreliable. <?php $start_date = date_create("2021-01-01"); $end_date = date_create("2021-01-05"); // If you want to include this date, add 1 day $interval = DateInterval::createFromDateString('1 day'); $daterange = new DatePeriod($start_date, $interval ,$end_date); foreach($daterange as $date1){ echo $date1->format('Y-m-d').'<br>'; } echo '<br>'; // reverse the array $daterange = array_reverse(iterator_to_array($daterange)); foreach($daterange as $date1){ echo $date1->format('Y-m-d').'<br>'; } ?> Gives 2021-01-01 2021-01-02 2021-01-03 2021-01-04 2021-01-04 2021-01-03 2021-01-02 2021-01-01 ---- Server IP: 45.112.84.4 Probable Submitter: 45.112.85.242 (proxied: 2407:7000:81a2:a000:d4e:f97a:51ad:7a57) ---- Manual Page -- https://php.net/manual/en/class.dateinterval.php Edit -- https://main.php.net/note/edit/126658 Del: integrated -- https://main.php.net/note/delete/126658/integrated Del: useless -- https://main.php.net/note/delete/126658/useless Del: bad code -- https://main.php.net/note/delete/126658/bad+code Del: spam -- https://main.php.net/note/delete/126658/spam Del: non-english -- https://main.php.net/note/delete/126658/non-english Del: in docs -- https://main.php.net/note/delete/126658/in+docs Del: other reasons-- https://main.php.net/note/delete/126658 Reject -- https://main.php.net/note/reject/126658 Search -- https://main.php.net/manage/user-notes.php