Get list of previous months from start of the year-CodePudding

I'm trying to get a list of previous months using Carbon.

Expected result:

January, February, March, April

What I did so far:

$now = Carbon::now();
$startMonth = $now->startOfMonth()->subMonth($now->month);
$currentMonth = $now->startOfMonth();
$diff = $currentMonth->diffInMonths($startMonth);

I've used Carbon::now() to get the first month of the year, then I tried to calculate the difference between the dates but I got 0.

Also I canno find any method that returns a list of months as the expected output.

CodePudding user response：

You're setting the original variable to December 1st of the previous year, since you keep modifying the original instead of copying it. Instead, create two variables off of now(), then you can use that to create a CarbonPeriod to iterate through.

$firstOfYear = Carbon::now()->firstOfYear();
$firstOfLastMonth = Carbon::now()->firstOfMonth()->subMonth(); // If you want to include the current month, drop ->subMonth()
$period = CarbonPeriod::create($firstOfYear, '1 month', $firstOfLastMonth);
foreach($period as $p) echo $p->format('F')."\n";

CodePudding user response：

Why not a simple while loop?

use Carbon\Carbon;

$previousMonths = [];

$currentDate = Carbon::now()->startOfMonth();
while ($currentDate->year == Carbon::now()->year) {
  $previousMonths[] = $currentDate->format('F');
  $currentDate->subMonth();
}

$previousMonths would now be:

[
  "April",
  "March",
  "February",
  "January",
]

Edit

If you need them in the opposite order, then:

$previousMonths = array_reverse($previousMonths);

Then $previousMonths will be:

[
  "January",
  "February",
  "March",
  "April",
]

CodePudding user response：

Another approach using PHP range:

$now = Carbon::now();
$months = collect( range(1, $now->month) )->map( function($month) use ($now) {
    return Carbon::createFromDate($now->year, $month)->format('F');
})->toArray();

This should return a collection of months (array if toArray() is used) from January until the current month (similar to the expected result)