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<?php $date = new DateTimeImmutable('2014-05'); var_dump($date->format('c')); $date2 = $date->modify('first day of next month midnight - 1 second'); var_dump($date2->format('c')); var_dump($date2->format('U')); var_dump($date2->format('c')); var_dump($date2->getTimestamp()); var_dump($date2->format('U')); var_dump($date2->format('c'));

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