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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
use PhpOffice\PhpSpreadsheet\Shared\Date as SharedDateHelper;
class Days360
{
use ArrayEnabled;
/**
* DAYS360.
*
* Returns the number of days between two dates based on a 360-day year (twelve 30-day months),
* which is used in some accounting calculations. Use this function to help compute payments if
* your accounting system is based on twelve 30-day months.
*
* Excel Function:
* DAYS360(startDate,endDate[,method])
*
* @param array|mixed $startDate Excel date serial value (float), PHP date timestamp (integer),
* PHP DateTime object, or a standard date string
* Or can be an array of date values
* @param array|mixed $endDate Excel date serial value (float), PHP date timestamp (integer),
* PHP DateTime object, or a standard date string
* Or can be an array of date values
* @param array|mixed $method US or European Method as a bool
* FALSE or omitted: U.S. (NASD) method. If the starting date is
* the last day of a month, it becomes equal to the 30th of the
* same month. If the ending date is the last day of a month and
* the starting date is earlier than the 30th of a month, the
* ending date becomes equal to the 1st of the next month;
* otherwise the ending date becomes equal to the 30th of the
* same month.
* TRUE: European method. Starting dates and ending dates that
* occur on the 31st of a month become equal to the 30th of the
* same month.
* Or can be an array of methods
*
* @return array|int|string Number of days between start date and end date
* If an array of values is passed for the $startDate or $endDays,arguments, then the returned result
* will also be an array with matching dimensions
*/
public static function between($startDate = 0, $endDate = 0, $method = false)
{
if (is_array($startDate) || is_array($endDate) || is_array($method)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $startDate, $endDate, $method);
}
try {
$startDate = Helpers::getDateValue($startDate);
$endDate = Helpers::getDateValue($endDate);
} catch (Exception $e) {
return $e->getMessage();
}
if (!is_bool($method)) {
return ExcelError::VALUE();
}
// Execute function
$PHPStartDateObject = SharedDateHelper::excelToDateTimeObject($startDate);
$startDay = $PHPStartDateObject->format('j');
$startMonth = $PHPStartDateObject->format('n');
$startYear = $PHPStartDateObject->format('Y');
$PHPEndDateObject = SharedDateHelper::excelToDateTimeObject($endDate);
$endDay = $PHPEndDateObject->format('j');
$endMonth = $PHPEndDateObject->format('n');
$endYear = $PHPEndDateObject->format('Y');
return self::dateDiff360((int) $startDay, (int) $startMonth, (int) $startYear, (int) $endDay, (int) $endMonth, (int) $endYear, !$method);
}
/**
* Return the number of days between two dates based on a 360 day calendar.
*/
private static function dateDiff360(int $startDay, int $startMonth, int $startYear, int $endDay, int $endMonth, int $endYear, bool $methodUS): int
{
$startDay = self::getStartDay($startDay, $startMonth, $startYear, $methodUS);
$endDay = self::getEndDay($endDay, $endMonth, $endYear, $startDay, $methodUS);
return $endDay + $endMonth * 30 + $endYear * 360 - $startDay - $startMonth * 30 - $startYear * 360;
}
private static function getStartDay(int $startDay, int $startMonth, int $startYear, bool $methodUS): int
{
if ($startDay == 31) {
--$startDay;
} elseif ($methodUS && ($startMonth == 2 && ($startDay == 29 || ($startDay == 28 && !Helpers::isLeapYear($startYear))))) {
$startDay = 30;
}
return $startDay;
}
private static function getEndDay(int $endDay, int &$endMonth, int &$endYear, int $startDay, bool $methodUS): int
{
if ($endDay == 31) {
if ($methodUS && $startDay != 30) {
$endDay = 1;
if ($endMonth == 12) {
++$endYear;
$endMonth = 1;
} else {
++$endMonth;
}
} else {
$endDay = 30;
}
}
return $endDay;
}
}
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