sum of hours HHMMSS in a loop and convert to seconds

pag sum lahat ng oras HH:MM:SS

at pag convert ng HH:MM:SS to seconds


<?php
 $times = array();

$times[] = "01:00:00";
$times[] = "01:30:60";

// pass the array to the function
echo AddPlayTime($times);

function AddPlayTime($times) {
    $minutes = 0; //declare minutes either it gives Notice: Undefined variable
    $seconds = 0;
    // loop throught all the times
    foreach ($times as $time) {
        list($hour, $minute, $seconds1) = explode(':', $time);

        $minutes += $hour * 60;
        $minutes += $minute;
        $seconds += $seconds1;
       // echo $seconds.'   ';
    }



    $hours = floor($minutes / 60);
    $minutes -= $hours * 60;


    // returns the time already formatted
    return sprintf('%02d:%02d:%02d', $hours, $minutes,$seconds);
}


$str_time = AddPlayTime($times);

$str_time = preg_replace("/^([\d]{1,2})\:([\d]{2})$/", "00:$1:$2", $str_time);

sscanf($str_time, "%d:%d:%d", $hours, $minutes, $seconds);

$time_seconds = $hours * 3600 + $minutes * 60 + $seconds;
echo "</br>";
echo $time_seconds;