PHP - Creating time duration - php

Question

I am trying to create a duration time.
I have a user option to enter a time duration in any of these formats: 0.5, 1, 1.5, 2, 2.5 ect.
I have a WordPress post date (used as a start time) and the finish time is calculated with the above user inputs. Together they build a duration time.
Example:
A user enters 1 - Example Out: Duration: 16:30 - 17:30
Problem:
This currently cannot output the correct end time if a user enters anything other then a whole number.
So, 1,2,3 ect would work fine, but 0.5, 1.5, 2.5 will all error and show the wrong end time.
I am need of a second pair of eyes, I cannot see the error of my ways.
// Get user duration option - 0.5, 1, 1.5, 2 ect
$course_hours = floatval(get_field('hours'));
$course_minutes = ($course_hours % 1) * 60;
$end_hour = intval(get_the_date('H'));
$end_minute = intval(get_the_date('i'));
$end_ampm = get_the_date('a');
if($course_minutes != 0 && $course_minutes + $end_minute <= 59){
$end_minute += $course_minutes;
$end_hour += floor($course_hours);
}
elseif($course_minutes != 0 && $course_minutes + $end_minute > 59){
$end_minute = ($course_minutes + $end_minute) % 60;
$end_hour += floor($course_hours) + 1;
}
elseif($course_minutes == 0){
$end_hour += floor($course_hours);
if ($end_minute == 0){$end_minute = '00';}
}
$end_time = $end_hour.':'.$end_minute;
$safe_post_status = get_post_status();
//Demo output
echo the_date('d F Y G:i');
echo ' - '.$end_time;
Thanks!

Answer 1

Writing logic for your question. Change the date format as per your requirement.
seems like you are using wordpress.
$course_hours = (get_field('hours'));
$course_minutes = ($course_hours) * 60;
$formatter = [];
$increment = 0.5;
$h = $increment * 60;
while ($h < $course_minutes ) {
$key = date('H:i', strtotime(date('Y-m-d') . ' + ' . $h . ' minutes'));
$value = date('h:i', strtotime(date('Y-m-d') . ' + ' . $h . ' minutes'));
$formatter[$key] = $value;
$h = $h + ($increment * 60 );
}
echo $output = implode(" - ",$formatter);
// 12:30 - 01:00 - 01:30 - 02:00