Laravel 7: How to add numeric value with date? - laravel

Question

I'm calculating the difference between two dates. I want to make addition/subtraction a numeric/decimal value with the date.
Example:
Start = 2022-06-28
end = 2022-06-29
total= (start - 0.5) - ( end - 0)
= 1.5
or
total= (start - 0) - ( end - 0)
= 2
or
total= (start - 0.5) - ( end - 0.5)
= 1
Code:
$second_half = $request->session_1; // value = 0.5
$first_half = $request->session_2; // value = 0.5
$start = Carbon::parse($request->start_date); // value (YYYY-MM-DD) = 2022-06-28
$end = Carbon::parse($request->end_date); // value (YYYY-MM-DD) = 2022-06-29
$total_days = $end->diff($start); // this result can be decimal like 1.5
Actually, I want to divide the full day into two-part. First half and second half. So when I calculating the difference between two dates it should calculate the full day by (first half + second half). If I select 2022-06-28 first half and 2022-06-29 second half, it will count 2 days. If I select 2022-06-28 first half and 2022-06-29 first half, it will count 1.5 days.
I hope my concept is clear to you. How can I make this calculation?

Answer 1

Can you test please the followind code?
$startDate = '2022-06-28';
$endDate = '2022-06-29';
$second_half = 0.5;
$first_half = 0.5;
$start = \Carbon\Carbon::parse($startDate);
$end = \Carbon\Carbon::parse($endDate);
$total_days = (float) $end->diff($start)->days;
if($first_half) {
$total_days += $first_half;
}
if ($second_half) {
$total_days += $second_half;
}
$total_days = preg_replace('/\\.$/','.0',rtrim($total_days,'0'));
// dd($total_days);

Answer 2

$second_half = $request->session_1; // value = 0.5
$first_half = $request->session_2; // value = 0.5
$start = Carbon::parse($request->start_date . ($first_half ? ' 12:00' : ' 00:00'));
$end = $second_half
? Carbon::parse($request->end_date . ' 12:00')
: Carbon::parse($request->end_date)->addDay();
$total_days = $end->floatDiffInDays($start);