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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;
use PhpOffice\PhpSpreadsheet\Shared\StringHelper;
class Date
{
use ArrayEnabled;
/**
* DATE.
*
* The DATE function returns a value that represents a particular date.
*
* NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the date
* format of your regional settings. PhpSpreadsheet does not change cell formatting in this way.
*
* Excel Function:
* DATE(year,month,day)
*
* PhpSpreadsheet is a lot more forgiving than MS Excel when passing non numeric values to this function.
* A Month name or abbreviation (English only at this point) such as 'January' or 'Jan' will still be accepted,
* as will a day value with a suffix (e.g. '21st' rather than simply 21); again only English language.
*
* @param array|int $year The value of the year argument can include one to four digits.
* Excel interprets the year argument according to the configured
* date system: 1900 or 1904.
* If year is between 0 (zero) and 1899 (inclusive), Excel adds that
* value to 1900 to calculate the year. For example, DATE(108,1,2)
* returns January 2, 2008 (1900+108).
* If year is between 1900 and 9999 (inclusive), Excel uses that
* value as the year. For example, DATE(2008,1,2) returns January 2,
* 2008.
* If year is less than 0 or is 10000 or greater, Excel returns the
* #NUM! error value.
* @param array|int $month A positive or negative integer representing the month of the year
* from 1 to 12 (January to December).
* If month is greater than 12, month adds that number of months to
* the first month in the year specified. For example, DATE(2008,14,2)
* returns the serial number representing February 2, 2009.
* If month is less than 1, month subtracts the magnitude of that
* number of months, plus 1, from the first month in the year
* specified. For example, DATE(2008,-3,2) returns the serial number
* representing September 2, 2007.
* @param array|int $day A positive or negative integer representing the day of the month
* from 1 to 31.
* If day is greater than the number of days in the month specified,
* day adds that number of days to the first day in the month. For
* example, DATE(2008,1,35) returns the serial number representing
* February 4, 2008.
* If day is less than 1, day subtracts the magnitude that number of
* days, plus one, from the first day of the month specified. For
* example, DATE(2008,1,-15) returns the serial number representing
* December 16, 2007.
*
* @return mixed Excel date/time serial value, PHP date/time serial value or PHP date/time object,
* depending on the value of the ReturnDateType flag
* If an array of numbers is passed as the argument, then the returned result will also be an array
* with the same dimensions
*/
public static function fromYMD($year, $month, $day)
{
if (is_array($year) || is_array($month) || is_array($day)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $year, $month, $day);
}
$baseYear = SharedDateHelper::getExcelCalendar();
try {
$year = self::getYear($year, $baseYear);
$month = self::getMonth($month);
$day = self::getDay($day);
self::adjustYearMonth($year, $month, $baseYear);
} catch (Exception $e) {
return $e->getMessage();
}
// Execute function
$excelDateValue = SharedDateHelper::formattedPHPToExcel($year, $month, $day);
return Helpers::returnIn3FormatsFloat($excelDateValue);
}
/**
* Convert year from multiple formats to int.
*
* @param mixed $year
*/
private static function getYear($year, int $baseYear): int
{
$year = ($year !== null) ? StringHelper::testStringAsNumeric((string) $year) : 0;
if (!is_numeric($year)) {
throw new Exception(ExcelError::VALUE());
}
$year = (int) $year;
if ($year < ($baseYear - 1900)) {
throw new Exception(ExcelError::NAN());
}
if ((($baseYear - 1900) !== 0) && ($year < $baseYear) && ($year >= 1900)) {
throw new Exception(ExcelError::NAN());
}
if (($year < $baseYear) && ($year >= ($baseYear - 1900))) {
$year += 1900;
}
return (int) $year;
}
/**
* Convert month from multiple formats to int.
*
* @param mixed $month
*/
private static function getMonth($month): int
{
if (($month !== null) && (!is_numeric($month))) {
$month = SharedDateHelper::monthStringToNumber($month);
}
$month = ($month !== null) ? StringHelper::testStringAsNumeric((string) $month) : 0;
if (!is_numeric($month)) {
throw new Exception(ExcelError::VALUE());
}
return (int) $month;
}
/**
* Convert day from multiple formats to int.
*
* @param mixed $day
*/
private static function getDay($day): int
{
if (($day !== null) && (!is_numeric($day))) {
$day = SharedDateHelper::dayStringToNumber($day);
}
$day = ($day !== null) ? StringHelper::testStringAsNumeric((string) $day) : 0;
if (!is_numeric($day)) {
throw new Exception(ExcelError::VALUE());
}
return (int) $day;
}
private static function adjustYearMonth(int &$year, int &$month, int $baseYear): void
{
if ($month < 1) {
// Handle year/month adjustment if month < 1
--$month;
$year += ceil($month / 12) - 1;
$month = 13 - abs($month % 12);
} elseif ($month > 12) {
// Handle year/month adjustment if month > 12
$year += floor($month / 12);
$month = ($month % 12);
}
// Re-validate the year parameter after adjustments
if (($year < $baseYear) || ($year >= 10000)) {
throw new Exception(ExcelError::NAN());
}
}
}
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