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<?php $start = new \DateTime('2015-08-31 00:00:00.000001'); $end = new \DateTime('2015-09-01 00:00:00.000000'); $diff = $start->diff($end); var_dump($diff); assert($diff->days === 0); assert($diff->d === 0); assert($diff->f === 1.0E-6);

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