- date_diff: documentation ( source)
- round: documentation ( source)
<?php
$t1 = new DateTime( '2014-09-03 15:00:00' );
$t2 = new DateTime( '2014-09-04 15:00:00' );
echo date_diff( $t1, $t2 )->h . '\n';
echo date_diff( $t1, $t2 )->days . '\n';
echo round( 26/24, 2);
?>