<?php

//+2 weeks later, "+" means add,"-" means minus

$offset= strtotime("+2 weeks"); //strtotime : string to time
echo date("d-m-y", $offset);
echo "<br>";
 
//+2 hours later, "+" means add,"-" means minus
 
$offset2=strtotime("+2 hours");
echo date("H:i:s",$offset2);
echo "<br>";
 
 
$offset3=strtotime("+3 weeks +3 hours");
echo date("d-m-y", $offset3);
echo "<br>";
echo date("H:i:s",$offset3);
echo "<br>";
 
?>