php获取两个日期相差多少个月份

	function getMonthNum($date1,$data2){
		$data1_time = strtotime($date1);
		$data2_time = strtotime($data2);
		
		$Y = date('Y',$data2_time) - date('Y',$data1_time);
		$M = date('m',$data2_time) - date('m',$data1_time);		
		return $res = abs($Y*12 + $M);

	}
	$months=getMonthNum('2019-12-11','2019-10-01');
	echo $months;