- var_dump: documentation ( source)
<?php
$mesi=array();
$start = new DateTime('2014-12-01');
$start->modify('first day of this month');
$end = new DateTime('2015-05-30');
$end->modify('first day of this month');
$interval = DateInterval::createFromDateString('1 month');
$period = new DatePeriod($start, $interval, $end);
foreach ($period as $dt) {
$mesi[]= $dt->format("mY");
}
var_dump($mesi);die();