Negative DateInterval

Question

I want to create a DatePeriod object with a negative DateInterval.

This creates a DatePeriod with the year increasing from today to 2016.

$this->S         


        

Answer 1

EDIT: note that this was inspired by khany's code above.

Here's a fully working script for my use-case, which is to display year+month strings from the current month going back N number of months. It should work with days or years as intervals and is tested with PHP version 5.3.3.

format('Ym'));
    $previousMonthDate->sub(new DateInterval("P1M"));
}

print_r($monthDateList) . "\n";

?>

The output is:

Array
(
    [0] => 201705
    [1] => 201704
    [2] => 201703
    [3] => 201702
    [4] => 201701
    [5] => 201612
    [6] => 201611
    [7] => 201610
    [8] => 201609
    [9] => 201608
    [10] => 201607
    [11] => 201606
    [12] => 201605
    [13] => 201604
    [14] => 201603
    [15] => 201602
)