- abs: documentation ( source)
- floor: documentation ( source)
- strtotime: documentation ( source)
- printf: documentation ( source)
<?php
$date1 = new DateTime('2015-03-31');
$date2 = new DateTime('2015-03-01');
$interval = $date1->diff($date2);
$diff = $interval->format('%y-%m-%d');
echo $interval->m;
echo "\n";
echo $diff;
echo "\n";
$date1 = "2015-03-31"; $date2 = "2015-03-01";
$diff = abs(strtotime($date2) - strtotime($date1));
$years = floor($diff / (365*60*60*24));
$months = floor(($diff - $years * 365*60*60*24) / (30*60*60*24));
$days = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24)/ (60*60*24));
printf("%d years, %d months, %d days\n", $years, $months, $days);
?>