Answers for "php dattime add seconde"

php datetime add one hour

$date = new DateTime('2006-12-12 15:00');
$date->modify('+1 hour');
echo $date->format('Y-m-d');	// 2006-12-12 16:00

add seconds to datetime php

<?php 
$date = new DateTime();
echo $date->getTimestamp(). "<br>";
$date->add(new DateInterval('PT674165S')); // adds 674165 secs
echo $date->getTimestamp();
?>