add 4 hours to time in php code example

Example 1: php add hours to current date

$new_time = date("Y-m-d H:i:s", strtotime('+5 hours'));

Example 2: add hour minute in datetime in php

$minutes_to_add = 5;

$time = new DateTime('2011-11-17 05:05');
$time->add(new DateInterval('PT' . $minutes_to_add . 'M'));

$stamp = $time->format('Y-m-d H:i');