<?php $start = DateTime::createFromFormat('U', 1347577200); $end = DateTime::createFromFormat('U', 1347580800); $diff = $start->diff($end); print 'Diff: '.$diff->h.' hours, '.$diff->i.' minutes'; $interval = DateInterval::createFromDateString('30 minutes'); var_dump($interval); $end->add($interval); $diff = $start->diff($end); print '<br>Diff after interval: '.$diff->h.' hours, '.$diff->i.' minutes'; ?>
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