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<?php $d = 1450283411; echo "Midnight of $d\n"; $date = new DateTime(); $date->setTimestamp($d); $date->setTime(0,0,0); echo $date->format('Y-m-d, H:i:s'); echo "\nor\n"; echo date(floor($d/86400)*86400,'Y-m-d H:i:s');

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