php - 日历 POV PHP 的日期准确性

Question

这里的这个函数基本上获取开始和结束日期，并循环遍历这些日期之间的所有月度日期。我面临的问题是，如果用户将日期指定为 2018-01-30(Y-m-d 格式)并且它将跳过 2 月，而是给出一个不需要的日期 2018-03-02(Y-m-d 格式)，那么我面临的问题是准确性。相反，我希望将日期设置为 2018-02-28。此外，对于像 2017-01-31 这样没有 31 的日期，应该将日期设置为该月的 30 号。

谢谢!

 /**
     * @param $startDate
     * @param $endDate
     * @return array
     */
    public function calculateDaysOfMonth($startDate, $endDate){

        $begin = new \DateTime($startDate);
        $end = new \DateTime($endDate);

       //For including last date in DatePeriod
        $end = $end->modify('+1 day');

        $days = array();

                $interval = new \DateInterval('P1M');
                $dateRange = new \DatePeriod($begin , $interval, $end);

                foreach ($dateRange as $date) {
                    $days[] = $date;

                }

        return $days;

    }

Answer 1

大家好，我解决了这个问题，现在我为需要日历 POV 一致性的情况提供解决方案。

<?php
 
 /**
 * @param $startDate
 * @param $endDate 
 * @return array
 */
 function calculateDaysOfMonth($startDate, $endDate){

    $begin = new DateTime($startDate);
    $end = new DateTime($endDate);
   


    $days = array();

    //Special case of February
    if($begin->format('d')== 29){


        $end = $end->modify('+1 month');
        $interval = new DateInterval('P1M');
        $dateRange = new DatePeriod($begin, $interval, $end);

        foreach($dateRange as $date){

            if($date->format('m')<02){
                $days[] = $date;
            }

            elseif($date->format('m')==3){
                $days[] = $date->modify('-1 day');
            }
            elseif($date->format('m')%2==0){
                $days[] = $date->modify('-3 day');
            }
            elseif ($date->format('m')%2!=0 && $date->format('m')>3){
                $days[] = $date->modify('-2 day');
            }

        }
        //var_dump($days);die();
            return $days;
    }

    //Months that dont have dates 30 and 31
    else if($begin->format('d')==30 || $begin->format('d')==31){

        $time1 = strtotime($begin->format('Y-m-d'));
        $time2 = strtotime($end->format('Y-m-d'));

        $my = date('mY', $time2);

        $months = array(date('Y-m-t', $time1));
        $f = '';

        while($time1 < $time2) {
            $time1 = strtotime((date('Y-m-d', $time1).' +15days'));

            if(date('F', $time1) != $f) {
                $f = date('F', $time1);

                if(date('mY', $time1) != $my && ($time1 < $time2))
                    $months[] = date('Y-m-t', $time1);
            }

        }

        $months[] = date('Y-m-d', $time2);

        return $months;
    }

    



}

$a = calculateDaysOfMonth('2018-01-29', '2018-06-30');
foreach($a as $b){
var_dump($b);
}

输出是这样的

object(DateTime)#6 (3) {
  ["date"]=>
  string(26) "2018-01-29 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}
object(DateTime)#7 (3) {
  ["date"]=>
  string(26) "2018-02-28 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}
object(DateTime)#8 (3) {
  ["date"]=>
  string(26) "2018-03-29 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}
object(DateTime)#9 (3) {
  ["date"]=>
  string(26) "2018-04-29 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}
object(DateTime)#10 (3) {
  ["date"]=>
  string(26) "2018-05-29 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}
object(DateTime)#11 (3) {
  ["date"]=>
  string(26) "2018-06-29 00:00:00.000000"
  ["timezone_type"]=>
  int(3)
  ["timezone"]=>
  string(10) "US/Pacific"
}