3v4l.org

run code in 300+ PHP versions simultaneously
<?php $interval = (new DateTime('2017-07-02 00:00:00'))->getTimestamp() - (new DateTime('2017-07-03 12:00:00'))->getTimestamp(); echo round( $interval / (60 * 60) );

preferences:
33.2 ms | 402 KiB | 5 Q