note 108303 added to datetime.modify

Note: This method modifies the object in-place. So if you want to calculate a new date but assign the new value to a different object, this will NOT work: <?php $numMinutes = 25; $oDateA = new DateTime('2012-01-01 12:00:00'); print " Original:<br> oDateA = {$oDateA->format('Y-m-d H-i-s')}<br> "; $oDateB = $oDateA->modify ("+{$numMinutes} minutes"); print " plus {$numMinutes} minutes:<br> oDateA = {$oDateA->format('Y-m-d H-i-s')}<br> oDateB = {$oDateB->format('Y-m-d H-i-s')}<br> "; ?> ...produces this: oDateA = 2012-01-01 12-00-00 plus 25 minutes: oDateA = 2012-01-01 12-25-00 oDateB = 2012-01-01 12-25-00 Use something like this instead: <?php $numMinutes = 25; $oDateA = new DateTime('2012-01-01 12:00:00'); print " <p> Original:<br> oDateA = {$oDateA->format('Y-m-d H-i-s')}<br> "; $oDateB = clone $oDateA; $oDateB->modify ("+{$numMinutes} minutes"); print " plus {$numMinutes} minutes:<br> oDateA = {$oDateA->format('Y-m-d H-i-s')}<br> oDateB = {$oDateB->format('Y-m-d H-i-s')}<br> "; ?> ... produces this: oDateA = 2012-01-01 12-00-00 plus 25 minutes: oDateA = 2012-01-01 12-00-00 oDateB = 2012-01-01 12-25-00 ---- Server IP: 208.69.120.55 Probable Submitter: 75.94.79.82 ---- Manual Page -- http://www.php.net/manual/en/datetime.modify.php Edit -- https://master.php.net/note/edit/108303 Del: integrated -- https://master.php.net/note/delete/108303/integrated Del: useless -- https://master.php.net/note/delete/108303/useless Del: bad code -- https://master.php.net/note/delete/108303/bad+code Del: spam -- https://master.php.net/note/delete/108303/spam Del: non-english -- https://master.php.net/note/delete/108303/non-english Del: in docs -- https://master.php.net/note/delete/108303/in+docs Del: other reasons-- https://master.php.net/note/delete/108303 Reject -- https://master.php.net/note/reject/108303 Search -- https://master.php.net/manage/user-notes.php