PHP Date Object Add 3 Seconds

Question

I want to add 2 seconds for current date object, I am getting data objects as propel foreach array result, this is the object I receive

DateTime Object
 (
 [date] => 2020年05月22日 09:03:21.000000
 [timezone_type] => 3
 [timezone] => Australia/Melbourne
 )

I tried this ways but no any change,

$row->getStartTime()->add(DateInterval::createFromDateString('+2 seconds'));
$row->getStartTime()->add(new DateInterval('PT2S'));

But I am unable to get the new with 2 seconds added for received time.

• Nigel Ren: Please add the actual code you use (which is relevant to this problem). Do you store the value of $row->getStartTime()->add - does your foreach use references for $row?
• user2552863: $row->getStartTime(); this the time object I receive.
• user2552863: I tried above mentioned 2 options but failed add add 2 seconds.

Answer 1

$time = $row->getStartTime()->format('H:i:s'); 
$callTimeMax = date('H:i:s', strtotime('+3 seconds', strtotime($time)));

This is my approach, It worked.