取时间段的月份

$start = '2017-10';
$end = date('Ym');
$range = [];
$i = 0;

do {
    $month = date('Ym', strtotime($start . ' + ' . $i . ' month'));
    $range[] = $month;
    $i++;
} while (strtotime($month) < strtotime($end));