fatch time from database and add in current time in php

<?php
$t=time();
echo($t . "<br>");
echo(date("Y-m-d",$t));
?>// 1. create a date instance
$date = new DateTime;

// 2. set the date using the setDate(year, month, date) method on the
//    $date instance
$date->setDate(1999,02,19);