Question

I have two data inputs where you can enter start time and finish time.

for example

start_time 13:00

finish_time 14:40

The entry will be always the format of HH:MM.

I’d like to find the time difference, in this case 100 minutes.

What is the best way to do it?

Answer 1

You could use diff within DateTime.

#!/usr/bin/env php

<?php

$datetime1 = new DateTime('13:00');
$datetime2 = new DateTime('14:40');

$interval = $datetime1->diff($datetime2);

$hours   = $interval->format('%h');
$minutes = $interval->format('%i');

echo $hours * 60 + $minutes;

?>