- date_diff: documentation ( source)
- var_dump: documentation ( source)
- strcmp: documentation ( source)
<?php
$today = new DateTime();
$prevDay = new DateTime( '2014-08-06 15:12:15' );
$gap = date_diff( $today, $prevDay )->format('%d');
var_dump( intval($gap) );
var_dump( strcmp( 'Shop Floor', 'Glue Room' ) );
?>