Adding 1 hour to time variable

This simple thing has wasted hours of my time trying to get it working, still havnt worked it out...

i have

$time = '10:09';

I want to add an hour to that...

So, I've tried:

$time = strtotime('+1 hour');

strtotime('+1 hour', $time);

$time = date('H:i', strtotime('+1 hour'));

None of the above worked.

Can you guys help me out?



Worked for me..

$timestamp = strtotime('10:09') + 60*60;

$time = date('H:i', $timestamp);

echo $time;//11:09

$time = '10:09';
$timestamp = strtotime($time);
$timestamp_one_hour_later = $timestamp + 3600; // 3600 sec. = 1 hour

// Formats the timestamp to HH:MM => outputs 11:09.
echo strftime('%H:%M', $timestamp_one_hour_later);
// As crolpa suggested, you can also do
// echo date('H:i', $timestamp_one_hour_later);

Check PHP manual for strtotime(), strftime() and date() for details.

BTW, in your initial code, you need to add some quotes otherwise you will get PHP syntax errors:

$time = 10:09; // wrong syntax
$time = '10:09'; // syntax OK

$time = date(H:i, strtotime('+1 hour')); // wrong syntax
$time = date('H:i', strtotime('+1 hour')); // syntax OK

You can do like this

    echo date('Y-m-d H:i:s', strtotime('4 minute'));
    echo date('Y-m-d H:i:s', strtotime('6 hour'));
    echo date('Y-m-d H:i:s', strtotime('2 day'));

You can use:

$time = strtotime("10:09") + 3600;
echo date('H:i', $time);

Or date_add:

Beware of adding 3600!! may be a problem on day change because of unix timestamp format uses moth before day.

e.g. 2012-03-02 23:33:33 would become 2014-01-13 13:00:00 by adding 3600 better use mktime and date functions they can handle this and things like adding 25 hours etc.

Simple and smart solution:

date("H:i:s", time()+3600);

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