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<?php $a = new \DateTime('2016-03-01', new \DateTimeZone('Europe/Warsaw')); $b = new \DateTime('2016-03-31', new \DateTimeZone('Europe/Warsaw')); $d = $a->diff($b); var_dump($d); $a1 = new \DateTime('2016-05-01', new \DateTimeZone('Europe/Warsaw')); $b1 = new \DateTime('2016-05-31', new \DateTimeZone('Europe/Warsaw')); $d1 = $a1->diff($b1); var_dump($d1); $a2 = new \DateTime('2016-04-01', new \DateTimeZone('Europe/Warsaw')); $b2 = new \DateTime('2016-04-30', new \DateTimeZone('Europe/Warsaw')); $d2 = $a2->diff($b2); var_dump($d2); $a3 = new \DateTime('2016-06-01', new \DateTimeZone('Europe/Warsaw')); $b3 = new \DateTime('2016-06-30', new \DateTimeZone('Europe/Warsaw')); $d3 = $a3->diff($b3); var_dump($d3); $a4 = new \DateTime('2016-07-01', new \DateTimeZone('Europe/Warsaw')); $b4 = new \DateTime('2016-07-31', new \DateTimeZone('Europe/Warsaw')); $d4 = $a4->diff($b4); var_dump($d4);

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