- var_dump: documentation ( source)
- date: documentation ( source)
- strtotime: documentation ( source)
<?php
$start = new DateTime(date('Y-m-d'));
$start->modify('first day of this month');
$end = new DateTime(date('Y-m-d', strtotime('-1 years')));
$end->modify('first day of next month');
$interval = DateInterval::createFromDateString('1 month');
$period = new DatePeriod($start, $interval, $end);
die(var_dump(date('Y-m-d', strtotime('-1 years'))));
foreach ($period as $dt) {
echo $dt->format("Y-m") . "<br>\n";
}