addition of gmt times in php

Question

i have a time zone in 2010-05-04T05:27:00.000Z format which indicates the GMT time and i want to add GMT 10+ in to it using php.

i can do that thing using following code but how would i directly add 2010-05-04T05:27:00.000Z and GMT 10+ so that i can get a valid date and time.

$offset=10*60*60; 
$dateFormat="d-m-Y H:i::m:s";
echo $timeNdate=gmdate($dateFormat, time()+$offset);

Answer 1

Maybe I'm missing the point but are you not really looking for DateTime::setTimezone ?

$timezone = new DateTimeZone('Etc/GMT-10'); // GMT+10:00
$datetime = new DateTime('2010-05-04T05:27:00.000Z');
$datetime->setTimezone($timezone);
echo $datetime->format('r');
// Tue, 04 May 2010 15:27:00 +1000

Answer 2

Use DateTime class http://php.net/manual/en/book.datetime.php exacly DateTime::Add() http://www.php.net/manual/en/datetime.add.php

You have some example here:

<?php
$date = new DateTime('2000-01-01');
$date->add(new DateInterval('PT10H30S'));
echo $date->format('Y-m-d H:i:s') . "\n";

$date = new DateTime('2000-01-01');
$date->add(new DateInterval('P7Y5M4DT4H3M2S'));
echo $date->format('Y-m-d H:i:s') . "\n";
?>

And another:

<?php
$date = new DateTime('2000-12-31');
$interval = new DateInterval('P1M');

$date->add($interval);
echo $date->format('Y-m-d') . "\n";

$date->add($interval);
echo $date->format('Y-m-d') . "\n";
?>