PHP PHPExcel_Shared_Date::dayStringToNumber方法代码示例

 /**
  * 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. PHPExcel does not change cell formatting in this way.
  *
  * Excel Function:
  *        DATE(year,month,day)
  *
  * PHPExcel 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.
  *
  * @access    public
  * @category Date/Time Functions
  * @param    integer        $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    integer        $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    integer        $day    A positive or negative integer representing the day of the month
  *                                from 1 to 31.
  *                                If day is greater than the number of days in the month specified,
  *                                day adds that number of days to the first day in the month. For
  *                                example, DATE(2008,1,35) returns the serial number representing
  *                                February 4, 2008.
  *                                If day is less than 1, day subtracts the magnitude that number of
  *                                days, plus one, from the first day of the month specified. For
  *                                example, DATE(2008,1,-15) returns the serial number representing
  *                                December 16, 2007.
  * @return    mixed    Excel date/time serial value, PHP date/time serial value or PHP date/time object,
  *                        depending on the value of the ReturnDateType flag
  */
 public static function DATE($year = 0, $month = 1, $day = 1)
 {
     $year = PHPExcel_Calculation_Functions::flattenSingleValue($year);
     $month = PHPExcel_Calculation_Functions::flattenSingleValue($month);
     $day = PHPExcel_Calculation_Functions::flattenSingleValue($day);
     if ($month !== null && !is_numeric($month)) {
         $month = PHPExcel_Shared_Date::monthStringToNumber($month);
     }
     if ($day !== null && !is_numeric($day)) {
         $day = PHPExcel_Shared_Date::dayStringToNumber($day);
     }
     $year = $year !== null ? PHPExcel_Shared_String::testStringAsNumeric($year) : 0;
     $month = $month !== null ? PHPExcel_Shared_String::testStringAsNumeric($month) : 0;
     $day = $day !== null ? PHPExcel_Shared_String::testStringAsNumeric($day) : 0;
     if (!is_numeric($year) || !is_numeric($month) || !is_numeric($day)) {
         return PHPExcel_Calculation_Functions::VALUE();
     }
     $year = (int) $year;
     $month = (int) $month;
     $day = (int) $day;
     $baseYear = PHPExcel_Shared_Date::getExcelCalendar();
     // Validate parameters
     if ($year < $baseYear - 1900) {
         return PHPExcel_Calculation_Functions::NaN();
     }
     if ($baseYear - 1900 != 0 && $year < $baseYear && $year >= 1900) {
         return PHPExcel_Calculation_Functions::NaN();
     }
     if ($year < $baseYear && $year >= $baseYear - 1900) {
         $year += 1900;
     }
     if ($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) {
         return PHPExcel_Calculation_Functions::NaN();
     }
     // Execute function
     $excelDateValue = PHPExcel_Shared_Date::FormattedPHPToExcel($year, $month, $day);
     switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
         case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
             return (double) $excelDateValue;
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