简单的方法来获取当前季度的天数？ [英] Easy way to get day number of current quarter?

问题描述

PHP提供了获取当月当前日期（日期（'j'））以及一年中当前日期（日期（'z'））数量的方法。

PHP provides ways to get the number of the current day of the month (date('j')) as well as the number of the current day of the year (date('z')). Is there a way to get the number of the current day of the current quarter?

所以，现在，即8月5日，是第三季度的第36天。

So right now, August 5, it is day 36 of the third quarter.

如果没有标准的计算方法，有人可以方便地使用（最好是基于PHP的）算法吗？

If there is no standard way of calculating this, does anyone have a (prefereably PHP-based) algorithm handy?

推荐答案

我用以下方法编写了一个类。

I wrote a class with the following methods. Enjoy.

public static function getQuarterByMonth($monthNumber) {
  return floor(($monthNumber - 1) / 3) + 1;
}

public static function getQuarterDay($monthNumber, $dayNumber, $yearNumber) {
  $quarterDayNumber = 0;
  $dayCountByMonth = array();

  $startMonthNumber = ((self::getQuarterByMonth($monthNumber) - 1) * 3) + 1;

  // Calculate the number of days in each month.
  for ($i=1; $i<=12; $i++) {
    $dayCountByMonth[$i] = date("t", strtotime($yearNumber . "-" . $i . "-01"));
  }

  for ($i=$startMonthNumber; $i<=$monthNumber-1; $i++) {
    $quarterDayNumber += $dayCountByMonth[$i];
  }

  $quarterDayNumber += $dayNumber;

  return $quarterDayNumber;
}

public static function getCurrentQuarterDay() {
  return self::getQuarterDay(date('n'), date('j'), date('Y'));
}

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