Here’s the code snippet to find the difference between two dates

<?php
 
$date1 = "2009-01-01 00:00:00";
$date2 = "2010-03-21 14:34:09"; 
$diff = abs(strtotime($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));
$hours   = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24 - $days*60*60*24)/ (60*60));
$minutes  = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24 - $days*60*60*24 - $hours*60*60)/ 60);
$seconds = floor(($diff - $years * 365*60*60*24 - $months*30*60*60*24 - $days*60*60*24 - $hours*60*60 - $minutes*60)); 
echo $years." years, ".$months." months, ".$days." days, ".$hours." hours, ".$minutes." minutes, ".$seconds." seconds";
?>