plindsay

<?php

/*
based on this SO answer - http://stackoverflow.com/a/40877555/134823
*/

$addMonths = function ($date, $months) {
	$orig_day = $date->format('d');
	$date->modify('+'.$months.' months');
	while ($date->format('d') < $orig_day && $date->format('d') < 5) {

plindsay

$begin = new \DateTime('-3 month');
$end = new \DateTime(date('Y-m-d'));
$end = $end->modify('+1 month');
$interval = \DateInterval::createFromDateString('+1 month');
$period = new \DatePeriod($begin, $interval, $end);

foreach($period as $dt) {
   $start = $dt->format('Y-m').'-01';
   echo $start."<br>";
}