How one can add 1 year to existing date object

<?php

//Example to add 1 year to a date object

$currentDate = date("Y-m-d");// current date

//Display the current date
echo "Current Date: ".$currentDate."<br>";

//Add one year to current date
$dateOneYearAdded = strtotime(date("Y-m-d", strtotime($currentDate)) . " +1 year");
echo "Date After adding one year: ".date('l dS \o\f F Y', $dateOneYearAdded)."<br>";

?>

Output of the program:

Current Date: 2011-12-27
Date After adding one year: Friday 28th of December 2012