如何使用php根据日期划分数字？

Question

我有 2 个变量叫做

$joined_date = 2016-09-18 和

$monthly_bill = 1200

现在我想用每月账单显示从加入日期到今天的所有月份。例如，循环应该显示如下结果：

2016-09-18        480 // Joined 18th and month end 30th = 12 days * (1200 / 30) 
2016-10-01        1200 
2016-11-01        1200 
2016-12-01        1200 
2017-01-01        1200 

如何使用 php 循环显示这个？

Answer 1

    //cal_days_in_month : Return the number of days in a month for a given year and calendar  

----------

<?php
$join_date="2016-09-18";
$begin = new DateTime($join_date); // value is : 2016-09-18
$monthly_bill = 1200;
$date=$begin->format('d');
$month=$begin->format('m');
$year=$begin->format("Y");
$ndays=cal_days_in_month(CAL_GREGORIAN,$month,$year);
if($date>1)
{
    $totaldays=$ndays-$date;
}
else{
    $totaldays=$ndays;
}
$paidbill=$totaldays * ($monthly_bill / $ndays);
echo $paidbill."<br/>";


?>