php string in a date format, add 12 hours

Question

I have this string object in my php array

\"2013-03-05 00:00:00+00\"

I would like to add 12 hours to the entry within PHP, then save it back to

Answer 1

Change add() to modify(). add() expects a DateInterval object.

<?php
$date = new DateTime("2013-03-05 00:00:00+00");
$date->modify("+12 hours");
echo $date->format("Y-m-d H:i:sO");

See it in action

Here's an example using a DateInterval object:

<?php
$date = new DateTime("2013-03-05 00:00:00+00");
$date->add(new DateInterval('PT12H'));
echo $date->format("Y-m-d H:i:sO");

See it in action

Answer 2

Use this to add hours,

$date1= "2014-07-03 11:00:00";
$new_date= date("Y-m-d H:i:s", strtotime($date1 . " +3 hours"));
echo $new_date;

Answer 3

If you have dynamic interval, this way will avoid errors of wrong format for $dateDiff:

$dateDiff = "12 hours";
$interval = DateInterval::createFromDateString($dateDiff);
$date = new DateTime("2013-03-05 00:00:00+00");
$date->add($interval);
echo $date->format("Y-m-d H:i:sO");

Answer 4

Change this line

$date->add("+12 hours");

with

$date->add(new DateInterval("PT12H"));

this will add 12 hours to your date

Look at the DateInterval constructor page to know how to build the DateInterval string