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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\Financial;
use DateTimeInterface;
use PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel;
use PhpOffice\PhpSpreadsheet\Calculation\Financial\Constants as FinancialConstants;
use PhpOffice\PhpSpreadsheet\Calculation\Functions;
class Helpers
{
/**
* daysPerYear.
*
* Returns the number of days in a specified year, as defined by the "basis" value
*
* @param int|string $year The year against which we're testing
* @param int|string $basis The type of day count:
* 0 or omitted US (NASD) 360
* 1 Actual (365 or 366 in a leap year)
* 2 360
* 3 365
* 4 European 360
*
* @return int|string Result, or a string containing an error
*/
public static function daysPerYear($year, $basis = 0)
{
if (!is_numeric($basis)) {
return Functions::NAN();
}
switch ($basis) {
case FinancialConstants::BASIS_DAYS_PER_YEAR_NASD:
case FinancialConstants::BASIS_DAYS_PER_YEAR_360:
case FinancialConstants::BASIS_DAYS_PER_YEAR_360_EUROPEAN:
return 360;
case FinancialConstants::BASIS_DAYS_PER_YEAR_365:
return 365;
case FinancialConstants::BASIS_DAYS_PER_YEAR_ACTUAL:
return (DateTimeExcel\Helpers::isLeapYear($year)) ? 366 : 365;
}
return Functions::NAN();
}
/**
* isLastDayOfMonth.
*
* Returns a boolean TRUE/FALSE indicating if this date is the last date of the month
*
* @param DateTimeInterface $date The date for testing
*/
public static function isLastDayOfMonth(DateTimeInterface $date): bool
{
return $date->format('d') === $date->format('t');
}
}