add hours:min:sec to date in PHP

Question

I am trying to add hh:mm:ss with the date. How can i do it?

I tried with the following but it works when the hour is string, but when adding time is similar to MySQL Date time it is not working.

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

I am trying to get solution for the following:

$timeA= '2015-10-09 13:40:14'; 

$timeB = '03:05:01';  // '0000-00-00 03:05:01'

OutPut:

$timeA + $timeB = 2015-10-09 16:45:15 ?

How Can I Add this?

Answer 1

Use DateInterval():

$timeA = new DateTime('2015-10-09 13:40:14');
$timeB = new DateInterval('PT3H5M1S'); // '03:05:01'; 
$timeA->add($timeB);
echo $timeA->format('Y-m-d H:i:s');

You would need to break your time down into the right DateInterval format but that is easily done with explode();

Here's how that might look:

$parts = array_map(function($num) {
    return (int) $num;
}, explode(':', '03:05:01'));

$timeA = new DateTime('2015-10-09 13:40:14');
$timeB = new DateInterval(sprintf('PT%uH%uM%uS', $parts[0], $parts[1], $parts[2]));
$timeA->add($timeB);
echo $timeA->format('Y-m-d H:i:s');

Demo