PHP sum foreach loop results

Question

I have this foreach code, and I want to sum the values that it returns, can someone help me with that please?

foreach($timel->results() as $timel) {

       $timeDiff = strtotime($timel->end_date) - strtotime($timel->start_date);

       $hours = floor($timeDiff / 3600);
       $remainder = $timeDiff - $hours * 3600;
       $formattedTime = sprintf('%02d', $hours) . gmdate(':i:s', $remainder);
       echo $formattedTime, '<br>'; 
}

This code outputs:

00:17:20

00:00:06

00:00:02

And I want to sum those value and then output 00:17:28.

Answer 1

you can use something like:

<?php

$totaltime = 0;    

foreach($timel->results() as $timel) {

   $timeDiff = strtotime($timel->end_date) - strtotime($timel->start_date);

   $totaltime += $timeDiff;
 }

$hours = floor($totaltime / 3600);
$remainder = $totaltime - $hours * 3600;
$formattedTime = sprintf('%02d', $hours) . gmdate(':i:s', $remainder);

echo $formattedTime;