PHP计算出两个年份的相差的月份

应该可行，你试一下代码

$time_begin   = strtotime("2016-07-03");
$time_end     = strtotime("2016-03-12");
$time_differ  = $time_end - $time_begin;
$year_differ  = date('Y', $time_differ);
$month_differ = date('m', $time_differ);
$result       = 12*intval($year_differ-1970)+intval($month_differ)-1;

$time_begin   = strtotime("2015-07-03");
$time_end     = strtotime("2016-03-12");
$time_differ  = $time_end - $time_begin;
$month_differ = date('m', $time_differ);
$result       = intval($month_differ)-1;