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<?php $d1 = '2014-10-25 23:59:59'; $d2 = '2014-10-26 00:00:00'; $dt1 = new DateTime($d1); $dt2 = new DateTime($d2); var_dump ($dt2->diff($dt1)->d); var_dump (strtotime($d2)-strtotime($d1));

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39.66 ms | 402 KiB | 5 Q