如何计算两个日期之间相隔的月份数量？

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php设定日期范围：起始日期为2014年9月8日，结束日期为2015年10月9日。首先，将日期字符串按照-分割成数组，然后提取年、月信息，并转换为整数。

$start_date = '2014-09-08'; $end_date = '2015-10-09'; $start_arr = explode("-", $start_date); $end_arr = explode("-", $end_date); $start_year = intval($start_arr[0]); $start_month = intval($start_arr[1]); $end_year = intval($end_arr[0]); $end_month = intval($end_arr[1]); $diff_year = $end_year-$start_year; $month_arr = []; //获取月份 if($diff_year == 0){ for($month = $start_month;$month<=$end_month;$month++){ $month_arr[] = $start_year.'-'.$month.'-1'; } } else { for($year =$start_year;$year<=$end_year;$year++){ if($year == $start_year){ for($month = $start_month;$month<=12;$month++){ $month_arr[] = $year.'-'.$month.'-1'; } }elseif($year==$end_year){ for($month = 1;$month<=$end_month;$month++){ $month_arr[] = $year.'-'.$month.'-1'; } }else{ for($month = 1;$month<=12;$month++){ $month_arr[] = $year.'-'.$month.'-1'; } } } } echo "<pre>"; print_r($month_arr); Array ( [0] => 2014-9-1 [1] => 2014-10-1 [2] => 2014-11-1 [3] => 2014-12-1 [4] => 2015-1-1 [5] => 2015-2-1 [6] => 2015-3-1 [7] => 2015-4-1 [8] => 2015-5-1 [9] => 2015-6-1 [10] => 2015-7-1 [11] => 2015-8-1 [12] => 2015-9-1 [13] => 2015-10-1 )