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<?php $nightStart = '23:00:00'; $nightEnd = '05:00:00'; $tripStart = new DateTime('2013-01-11 22:00:00'); $tripEnd = new DateTime('2013-01-12 00:00:00'); $now = new DateTime('now'); $today = $now->format('Y-m-d'); $nightTodayStart = new DateTime($today . $nightStart); $nightFare = $tripEnd->diff($nightTodayStart); var_dump($nightFare); ?>

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