Time spent (Hours minutes seconds) using Carbon

gistfile1.txt

<?php // Run it at: https://web.tinkerwell.app

use Carbon\Carbon;

$datetime_start = Carbon::now()->subHours(1)->subMinutes(05)->subSeconds(42);
echo $datetime_start->format('Y-m-d H:i:s') . "\r\n";

$datetime_end = Carbon::now();
$timestamp_ms_end = $datetime_end->getTimestamp();
echo $datetime_end->format('Y-m-d H:i:s') . "\r\n";

echo $datetime_start->longAbsoluteDiffForHumans($datetime_end, 3);