- floor: documentation ( source)
- strtotime: documentation ( source)
<?php
$end_date = "2014-10-09 15:03:10";
$now = "2014-10-09 15:01:10";
$diff = strtotime($now) - strtotime($end_date);
$fullDays = floor($diff/(60*60*24));
$fullHours = floor(($diff-($fullDays*60*60*24))/(60*60));
$fullMinutes = floor(($diff-($fullDays*60*60*24)-($fullHours*60*60))/60);
echo "Difference is $fullDays days, $fullHours hours and $fullMinutes minutes.";