<?php
$todayDate = date("Y-m-d");// current date
echo "Today: ".$todayDate."<br>";
//Add one day to today
$dateOneMonthAdded = strtotime(date("Y-m-d", strtotime($todayDate)) . "+1 month");
echo "After adding one month: ".date('l dS \o\f F Y', $dateOneMonthAdded)."<br>";