<?php $base = new DateTime('2013-01-01'); $date = clone $base; $date2 = clone $base; $interval = new DateInterval("P34D"); //34 days $date2->add($interval); // add 34 days var_dump($date2->format('r'), $date->diff($date2)->format("%a")); // Expected 34 days , got 34 $date2->add($interval); // add 34 days var_dump($date2->format('r'), $date->diff($date2)->format("%a")); // Expedted 68 , recived 65 $date = clone $base; $date2 = clone $base; $interval = new DateInterval("P34D"); //34 days $date2->modify("+1 month +3 day"); // add 34 dayss var_dump($date2->format('r'), $date->diff($date2)->format("%a")); // Expected 34 days , got 34 $date2->modify("+1 month +3 day"); // add 34 days var_dump($date2->format('r'), $date->diff($date2)->format("%a")); // Expedted 68 , recived 65
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