<?php // 101 Date_add, Date_sub & Date_modify echo "</br><span class='myheading'>101 Date_add, Date_sub & Date_modify</span></br>"; $date = date_create("2015-05-15"); // add to this date echo "Reference Date = ".date_format($date, "d-m-Y"). "<br><br>"; date_add($date,date_interval_create_from_date_string("30days")); // add 30 days echo date_format($date, "d-m-Y"). "<br><br>"; $date = date_create("2015-05-15"); date_sub($date,date_interval_create_from_date_string("10days")); /*------Date Subtract Function------- */ echo date_format($date, "d-m-Y"). "<br><br>"; $date = date_create("2015-05-15"); date_modify($date,"10days"); /*- Date Modify Function, can do subtraction and addition - */ echo date_format($date, "d-m-Y"). "<br><br>"; $date = date_create("2015-05-15"); date_modify($date,"-10days"); /*- Date Modify Function, can do subtraction and addition - */ echo date_format($date, "d-m-Y"). "<br><br>"; ?>