PHP: How calculate calendar days with all 42 days - php

Question

The goal is exclusively to get a range of days, in other words
, start date and end date, as if it were a "calendar matrix", containing the 42 days, being the days of the current month, with the days of the previous month and next month. No need to present (render) a calendar, only get dates.
For example, follow image below.
I need to enter a certain month of a given year, and would need to get this range of days, as picture.
Using PHP Carbon, I easily get the days of the current month, using startOfMonth(), endOfMonth() , subMonth(), addMonth().
Doing this, I get every day of these 3 months, but the goal is to be able to "filter" these days to present only the interval equal to a calendar, but obviously something dynamic, ie, if I use Carbon, would simply inform the desired date , and get "filtered" range, respecting the position of each "cell".
$prev_start = Carbon::now()->subMonth()->startOfMonth();
$prev_end = Carbon::now()->subMonth()->endOfMonth();
$start = Carbon::now()->startOfMonth();
$end = Carbon::now()->endOfMonth();
$next_start = Carbon::now()->addMonth()->startOfMonth();
$next_end = Carbon::now()->addMonth()->endOfMonth();

Answer 1

So here's what you can do:
$monthStart = Carbon::now()->startOfMonth();
$monthEnd = Carbon::now()->endOfMonth();
$calendarStart = $monthStart->startOfWeek(Carbon::SUNDAY);
$calendarEnd = $monthEnd->endOfWeek(Carbon::SATURDAY);
$calendarStart and $calendarEnd should now contain the first and last day that will be displayed in a single screen. This assumes that the calendar will expand the first and last week displayed.
If you are using a calendar that always shows 42 days regardless you can just do:
$monthStart = Carbon::now()->startOfMonth();
$calendarStart = $monthStart->startOfWeek(Carbon::SUNDAY);
$calendarEnd = $calendarStart->addDay(42);