Online PHP editor | refs for Y7Z3F

<?php $di = date_diff(\DateTime::createFromFormat('U', 1391209200), \DateTime::createFromFormat('U', 1393628400)); var_dump($di); echo date('Y-m-d H:i:s', 1393628400)."\n"; $fe = \DateTime::createFromFormat('U', 1391209200); $fe->add(new \DateInterval('P1M')); echo $fe->format('Y-m-d H:i:s')."\n"; $p1m = strtotime('+1 month', 1391209200); echo "$p1m\n"; echo date('Y-m-d H:i:s', $p1m)."\n";