PHP总和foreach循环结果

Question

我有这个foreach代码，我想对它返回的值求和，有人可以帮我吗？

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>'; 
}

此代码输出：

00:17:20

00:00:06

00:00:02

我想对这些值求和，然后输出00:17:28。

Answer 1

您可以使用类似：

<?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;