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DateTime.php in Loft Data Grids 7.2

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<?php

/**
 * PHPExcel
 *
 * Copyright (c) 2006 - 2014 PHPExcel
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * @category	PHPExcel
 * @package		PHPExcel_Calculation
 * @copyright	Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license		http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt	LGPL
 * @version		##VERSION##, ##DATE##
 */

/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {

  /**
   * @ignore
   */
  define('PHPEXCEL_ROOT', dirname(__FILE__) . '/../../');
  require PHPEXCEL_ROOT . 'PHPExcel/Autoloader.php';
}

/**
 * PHPExcel_Calculation_DateTime
 *
 * @category	PHPExcel
 * @package		PHPExcel_Calculation
 * @copyright	Copyright (c) 2006 - 2014 PHPExcel (http://www.codeplex.com/PHPExcel)
 */
class PHPExcel_Calculation_DateTime {

  /**
   * Identify if a year is a leap year or not
   *
   * @param	integer	$year	The year to test
   * @return	boolean			TRUE if the year is a leap year, otherwise FALSE
   */
  public static function _isLeapYear($year) {
    return $year % 4 == 0 && $year % 100 != 0 || $year % 400 == 0;
  }

  //	function _isLeapYear()

  /**
   * Return the number of days between two dates based on a 360 day calendar
   *
   * @param	integer	$startDay		Day of month of the start date
   * @param	integer	$startMonth		Month of the start date
   * @param	integer	$startYear		Year of the start date
   * @param	integer	$endDay			Day of month of the start date
   * @param	integer	$endMonth		Month of the start date
   * @param	integer	$endYear		Year of the start date
   * @param	boolean $methodUS		Whether to use the US method or the European method of calculation
   * @return	integer	Number of days between the start date and the end date
   */
  private static function _dateDiff360($startDay, $startMonth, $startYear, $endDay, $endMonth, $endYear, $methodUS) {
    if ($startDay == 31) {
      --$startDay;
    }
    elseif ($methodUS && ($startMonth == 2 && ($startDay == 29 || $startDay == 28 && !self::_isLeapYear($startYear)))) {
      $startDay = 30;
    }
    if ($endDay == 31) {
      if ($methodUS && $startDay != 30) {
        $endDay = 1;
        if ($endMonth == 12) {
          ++$endYear;
          $endMonth = 1;
        }
        else {
          ++$endMonth;
        }
      }
      else {
        $endDay = 30;
      }
    }
    return $endDay + $endMonth * 30 + $endYear * 360 - $startDay - $startMonth * 30 - $startYear * 360;
  }

  //	function _dateDiff360()

  /**
   * _getDateValue
   *
   * @param	string	$dateValue
   * @return	mixed	Excel date/time serial value, or string if error
   */
  public static function _getDateValue($dateValue) {
    if (!is_numeric($dateValue)) {
      if (is_string($dateValue) && PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
      if (is_object($dateValue) && $dateValue instanceof DateTime) {
        $dateValue = PHPExcel_Shared_Date::PHPToExcel($dateValue);
      }
      else {
        $saveReturnDateType = PHPExcel_Calculation_Functions::getReturnDateType();
        PHPExcel_Calculation_Functions::setReturnDateType(PHPExcel_Calculation_Functions::RETURNDATE_EXCEL);
        $dateValue = self::DATEVALUE($dateValue);
        PHPExcel_Calculation_Functions::setReturnDateType($saveReturnDateType);
      }
    }
    return $dateValue;
  }

  //	function _getDateValue()

  /**
   * _getTimeValue
   *
   * @param	string	$timeValue
   * @return	mixed	Excel date/time serial value, or string if error
   */
  private static function _getTimeValue($timeValue) {
    $saveReturnDateType = PHPExcel_Calculation_Functions::getReturnDateType();
    PHPExcel_Calculation_Functions::setReturnDateType(PHPExcel_Calculation_Functions::RETURNDATE_EXCEL);
    $timeValue = self::TIMEVALUE($timeValue);
    PHPExcel_Calculation_Functions::setReturnDateType($saveReturnDateType);
    return $timeValue;
  }

  //	function _getTimeValue()
  private static function _adjustDateByMonths($dateValue = 0, $adjustmentMonths = 0) {

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    $oMonth = (int) $PHPDateObject
      ->format('m');
    $oYear = (int) $PHPDateObject
      ->format('Y');
    $adjustmentMonthsString = (string) $adjustmentMonths;
    if ($adjustmentMonths > 0) {
      $adjustmentMonthsString = '+' . $adjustmentMonths;
    }
    if ($adjustmentMonths != 0) {
      $PHPDateObject
        ->modify($adjustmentMonthsString . ' months');
    }
    $nMonth = (int) $PHPDateObject
      ->format('m');
    $nYear = (int) $PHPDateObject
      ->format('Y');
    $monthDiff = $nMonth - $oMonth + ($nYear - $oYear) * 12;
    if ($monthDiff != $adjustmentMonths) {
      $adjustDays = (int) $PHPDateObject
        ->format('d');
      $adjustDaysString = '-' . $adjustDays . ' days';
      $PHPDateObject
        ->modify($adjustDaysString);
    }
    return $PHPDateObject;
  }

  //	function _adjustDateByMonths()

  /**
   * DATETIMENOW
   *
   * Returns the current date and time.
   * The NOW function is useful when you need to display the current date and time on a worksheet or
   * calculate a value based on the current date and time, and have that value updated each time you
   * open the worksheet.
   *
   * NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the date
   * and time format of your regional settings. PHPExcel does not change cell formatting in this way.
   *
   * Excel Function:
   *		NOW()
   *
   * @access	public
   * @category Date/Time Functions
   * @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 DATETIMENOW() {
    $saveTimeZone = date_default_timezone_get();
    date_default_timezone_set('UTC');
    $retValue = False;
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        $retValue = (double) PHPExcel_Shared_Date::PHPToExcel(time());
        break;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        $retValue = (int) time();
        break;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        $retValue = new DateTime();
        break;
    }
    date_default_timezone_set($saveTimeZone);
    return $retValue;
  }

  //	function DATETIMENOW()

  /**
   * DATENOW
   *
   * Returns the current date.
   * The NOW function is useful when you need to display the current date and time on a worksheet or
   * calculate a value based on the current date and time, and have that value updated each time you
   * open the worksheet.
   *
   * NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the date
   * and time format of your regional settings. PHPExcel does not change cell formatting in this way.
   *
   * Excel Function:
   *		TODAY()
   *
   * @access	public
   * @category Date/Time Functions
   * @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 DATENOW() {
    $saveTimeZone = date_default_timezone_get();
    date_default_timezone_set('UTC');
    $retValue = False;
    $excelDateTime = floor(PHPExcel_Shared_Date::PHPToExcel(time()));
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        $retValue = (double) $excelDateTime;
        break;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        $retValue = (int) PHPExcel_Shared_Date::ExcelToPHP($excelDateTime);
        break;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        $retValue = PHPExcel_Shared_Date::ExcelToPHPObject($excelDateTime);
        break;
    }
    date_default_timezone_set($saveTimeZone);
    return $retValue;
  }

  //	function DATENOW()

  /**
   * 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) $excelDateValue;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        return (int) PHPExcel_Shared_Date::ExcelToPHP($excelDateValue);
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        return PHPExcel_Shared_Date::ExcelToPHPObject($excelDateValue);
    }
  }

  //	function DATE()

  /**
   * TIME
   *
   * The TIME function returns a value that represents a particular time.
   *
   * NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the time
   * format of your regional settings. PHPExcel does not change cell formatting in this way.
   *
   * Excel Function:
   *		TIME(hour,minute,second)
   *
   * @access	public
   * @category Date/Time Functions
   * @param	integer		$hour		A number from 0 (zero) to 32767 representing the hour.
   *									Any value greater than 23 will be divided by 24 and the remainder
   *									will be treated as the hour value. For example, TIME(27,0,0) =
   *									TIME(3,0,0) = .125 or 3:00 AM.
   * @param	integer		$minute		A number from 0 to 32767 representing the minute.
   *									Any value greater than 59 will be converted to hours and minutes.
   *									For example, TIME(0,750,0) = TIME(12,30,0) = .520833 or 12:30 PM.
   * @param	integer		$second		A number from 0 to 32767 representing the second.
   *									Any value greater than 59 will be converted to hours, minutes,
   *									and seconds. For example, TIME(0,0,2000) = TIME(0,33,22) = .023148
   *									or 12:33:20 AM
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function TIME($hour = 0, $minute = 0, $second = 0) {
    $hour = PHPExcel_Calculation_Functions::flattenSingleValue($hour);
    $minute = PHPExcel_Calculation_Functions::flattenSingleValue($minute);
    $second = PHPExcel_Calculation_Functions::flattenSingleValue($second);
    if ($hour == '') {
      $hour = 0;
    }
    if ($minute == '') {
      $minute = 0;
    }
    if ($second == '') {
      $second = 0;
    }
    if (!is_numeric($hour) || !is_numeric($minute) || !is_numeric($second)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $hour = (int) $hour;
    $minute = (int) $minute;
    $second = (int) $second;
    if ($second < 0) {
      $minute += floor($second / 60);
      $second = 60 - abs($second % 60);
      if ($second == 60) {
        $second = 0;
      }
    }
    elseif ($second >= 60) {
      $minute += floor($second / 60);
      $second = $second % 60;
    }
    if ($minute < 0) {
      $hour += floor($minute / 60);
      $minute = 60 - abs($minute % 60);
      if ($minute == 60) {
        $minute = 0;
      }
    }
    elseif ($minute >= 60) {
      $hour += floor($minute / 60);
      $minute = $minute % 60;
    }
    if ($hour > 23) {
      $hour = $hour % 24;
    }
    elseif ($hour < 0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        $date = 0;
        $calendar = PHPExcel_Shared_Date::getExcelCalendar();
        if ($calendar != PHPExcel_Shared_Date::CALENDAR_WINDOWS_1900) {
          $date = 1;
        }
        return (double) PHPExcel_Shared_Date::FormattedPHPToExcel($calendar, 1, $date, $hour, $minute, $second);
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        return (int) PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::FormattedPHPToExcel(1970, 1, 1, $hour, $minute, $second));

      // -2147468400; //	-2147472000 + 3600
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        $dayAdjust = 0;
        if ($hour < 0) {
          $dayAdjust = floor($hour / 24);
          $hour = 24 - abs($hour % 24);
          if ($hour == 24) {
            $hour = 0;
          }
        }
        elseif ($hour >= 24) {
          $dayAdjust = floor($hour / 24);
          $hour = $hour % 24;
        }
        $phpDateObject = new DateTime('1900-01-01 ' . $hour . ':' . $minute . ':' . $second);
        if ($dayAdjust != 0) {
          $phpDateObject
            ->modify($dayAdjust . ' days');
        }
        return $phpDateObject;
    }
  }

  //	function TIME()

  /**
   * DATEVALUE
   *
   * Returns a value that represents a particular date.
   * Use DATEVALUE to convert a date represented by a text string to an Excel or PHP date/time stamp
   * value.
   *
   * 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:
   *		DATEVALUE(dateValue)
   *
   * @access	public
   * @category Date/Time Functions
   * @param	string	$dateValue		Text that represents a date in a Microsoft Excel date format.
   *									For example, "1/30/2008" or "30-Jan-2008" are text strings within
   *									quotation marks that represent dates. Using the default date
   *									system in Excel for Windows, date_text must represent a date from
   *									January 1, 1900, to December 31, 9999. Using the default date
   *									system in Excel for the Macintosh, date_text must represent a date
   *									from January 1, 1904, to December 31, 9999. DATEVALUE returns the
   *									#VALUE! error value if date_text is out of this range.
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function DATEVALUE($dateValue = 1) {
    $dateValue = trim(PHPExcel_Calculation_Functions::flattenSingleValue($dateValue), '"');

    //	Strip any ordinals because they're allowed in Excel (English only)
    $dateValue = preg_replace('/(\\d)(st|nd|rd|th)([ -\\/])/Ui', '$1$3', $dateValue);

    //	Convert separators (/ . or space) to hyphens (should also handle dot used for ordinals in some countries, e.g. Denmark, Germany)
    $dateValue = str_replace(array(
      '/',
      '.',
      '-',
      '  ',
    ), array(
      ' ',
      ' ',
      ' ',
      ' ',
    ), $dateValue);
    $yearFound = false;
    $t1 = explode(' ', $dateValue);
    foreach ($t1 as &$t) {
      if (is_numeric($t) && $t > 31) {
        if ($yearFound) {
          return PHPExcel_Calculation_Functions::VALUE();
        }
        else {
          if ($t < 100) {
            $t += 1900;
          }
          $yearFound = true;
        }
      }
    }
    if (count($t1) == 1 && strpos($t, ':') != false) {

      //	We've been fed a time value without any date
      return 0.0;
    }
    elseif (count($t1) == 2) {

      //	We only have two parts of the date: either day/month or month/year
      if ($yearFound) {
        array_unshift($t1, 1);
      }
      else {
        array_push($t1, date('Y'));
      }
    }
    unset($t);
    $dateValue = implode(' ', $t1);
    $PHPDateArray = date_parse($dateValue);
    if ($PHPDateArray === False || $PHPDateArray['error_count'] > 0) {
      $testVal1 = strtok($dateValue, '- ');
      if ($testVal1 !== False) {
        $testVal2 = strtok('- ');
        if ($testVal2 !== False) {
          $testVal3 = strtok('- ');
          if ($testVal3 === False) {
            $testVal3 = strftime('%Y');
          }
        }
        else {
          return PHPExcel_Calculation_Functions::VALUE();
        }
      }
      else {
        return PHPExcel_Calculation_Functions::VALUE();
      }
      $PHPDateArray = date_parse($testVal1 . '-' . $testVal2 . '-' . $testVal3);
      if ($PHPDateArray === False || $PHPDateArray['error_count'] > 0) {
        $PHPDateArray = date_parse($testVal2 . '-' . $testVal1 . '-' . $testVal3);
        if ($PHPDateArray === False || $PHPDateArray['error_count'] > 0) {
          return PHPExcel_Calculation_Functions::VALUE();
        }
      }
    }
    if ($PHPDateArray !== False && $PHPDateArray['error_count'] == 0) {

      // Execute function
      if ($PHPDateArray['year'] == '') {
        $PHPDateArray['year'] = strftime('%Y');
      }
      if ($PHPDateArray['year'] < 1900) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
      if ($PHPDateArray['month'] == '') {
        $PHPDateArray['month'] = strftime('%m');
      }
      if ($PHPDateArray['day'] == '') {
        $PHPDateArray['day'] = strftime('%d');
      }
      $excelDateValue = floor(PHPExcel_Shared_Date::FormattedPHPToExcel($PHPDateArray['year'], $PHPDateArray['month'], $PHPDateArray['day'], $PHPDateArray['hour'], $PHPDateArray['minute'], $PHPDateArray['second']));
      switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
        case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
          return (double) $excelDateValue;
        case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
          return (int) PHPExcel_Shared_Date::ExcelToPHP($excelDateValue);
        case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
          return new DateTime($PHPDateArray['year'] . '-' . $PHPDateArray['month'] . '-' . $PHPDateArray['day'] . ' 00:00:00');
      }
    }
    return PHPExcel_Calculation_Functions::VALUE();
  }

  //	function DATEVALUE()

  /**
   * TIMEVALUE
   *
   * Returns a value that represents a particular time.
   * Use TIMEVALUE to convert a time represented by a text string to an Excel or PHP date/time stamp
   * value.
   *
   * NOTE: When used in a Cell Formula, MS Excel changes the cell format so that it matches the time
   * format of your regional settings. PHPExcel does not change cell formatting in this way.
   *
   * Excel Function:
   *		TIMEVALUE(timeValue)
   *
   * @access	public
   * @category Date/Time Functions
   * @param	string	$timeValue		A text string that represents a time in any one of the Microsoft
   *									Excel time formats; for example, "6:45 PM" and "18:45" text strings
   *									within quotation marks that represent time.
   *									Date information in time_text is ignored.
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function TIMEVALUE($timeValue) {
    $timeValue = trim(PHPExcel_Calculation_Functions::flattenSingleValue($timeValue), '"');
    $timeValue = str_replace(array(
      '/',
      '.',
    ), array(
      '-',
      '-',
    ), $timeValue);
    $PHPDateArray = date_parse($timeValue);
    if ($PHPDateArray !== False && $PHPDateArray['error_count'] == 0) {
      if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_OPENOFFICE) {
        $excelDateValue = PHPExcel_Shared_Date::FormattedPHPToExcel($PHPDateArray['year'], $PHPDateArray['month'], $PHPDateArray['day'], $PHPDateArray['hour'], $PHPDateArray['minute'], $PHPDateArray['second']);
      }
      else {
        $excelDateValue = PHPExcel_Shared_Date::FormattedPHPToExcel(1900, 1, 1, $PHPDateArray['hour'], $PHPDateArray['minute'], $PHPDateArray['second']) - 1;
      }
      switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
        case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
          return (double) $excelDateValue;
        case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
          return (int) ($phpDateValue = PHPExcel_Shared_Date::ExcelToPHP($excelDateValue + 25569) - 3600);
        case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
          return new DateTime('1900-01-01 ' . $PHPDateArray['hour'] . ':' . $PHPDateArray['minute'] . ':' . $PHPDateArray['second']);
      }
    }
    return PHPExcel_Calculation_Functions::VALUE();
  }

  //	function TIMEVALUE()

  /**
   * DATEDIF
   *
   * @param	mixed	$startDate		Excel date serial value, PHP date/time stamp, PHP DateTime object
   *									or a standard date string
   * @param	mixed	$endDate		Excel date serial value, PHP date/time stamp, PHP DateTime object
   *									or a standard date string
   * @param	string	$unit
   * @return	integer	Interval between the dates
   */
  public static function DATEDIF($startDate = 0, $endDate = 0, $unit = 'D') {
    $startDate = PHPExcel_Calculation_Functions::flattenSingleValue($startDate);
    $endDate = PHPExcel_Calculation_Functions::flattenSingleValue($endDate);
    $unit = strtoupper(PHPExcel_Calculation_Functions::flattenSingleValue($unit));
    if (is_string($startDate = self::_getDateValue($startDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    if (is_string($endDate = self::_getDateValue($endDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }

    // Validate parameters
    if ($startDate >= $endDate) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $difference = $endDate - $startDate;
    $PHPStartDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($startDate);
    $startDays = $PHPStartDateObject
      ->format('j');
    $startMonths = $PHPStartDateObject
      ->format('n');
    $startYears = $PHPStartDateObject
      ->format('Y');
    $PHPEndDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($endDate);
    $endDays = $PHPEndDateObject
      ->format('j');
    $endMonths = $PHPEndDateObject
      ->format('n');
    $endYears = $PHPEndDateObject
      ->format('Y');
    $retVal = PHPExcel_Calculation_Functions::NaN();
    switch ($unit) {
      case 'D':
        $retVal = intval($difference);
        break;
      case 'M':
        $retVal = intval($endMonths - $startMonths) + intval($endYears - $startYears) * 12;

        //	We're only interested in full months
        if ($endDays < $startDays) {
          --$retVal;
        }
        break;
      case 'Y':
        $retVal = intval($endYears - $startYears);

        //	We're only interested in full months
        if ($endMonths < $startMonths) {
          --$retVal;
        }
        elseif ($endMonths == $startMonths && $endDays < $startDays) {
          --$retVal;
        }
        break;
      case 'MD':
        if ($endDays < $startDays) {
          $retVal = $endDays;
          $PHPEndDateObject
            ->modify('-' . $endDays . ' days');
          $adjustDays = $PHPEndDateObject
            ->format('j');
          if ($adjustDays > $startDays) {
            $retVal += $adjustDays - $startDays;
          }
        }
        else {
          $retVal = $endDays - $startDays;
        }
        break;
      case 'YM':
        $retVal = intval($endMonths - $startMonths);
        if ($retVal < 0) {
          $retVal = 12 + $retVal;
        }

        //	We're only interested in full months
        if ($endDays < $startDays) {
          --$retVal;
        }
        break;
      case 'YD':
        $retVal = intval($difference);
        if ($endYears > $startYears) {
          while ($endYears > $startYears) {
            $PHPEndDateObject
              ->modify('-1 year');
            $endYears = $PHPEndDateObject
              ->format('Y');
          }
          $retVal = $PHPEndDateObject
            ->format('z') - $PHPStartDateObject
            ->format('z');
          if ($retVal < 0) {
            $retVal += 365;
          }
        }
        break;
      default:
        $retVal = PHPExcel_Calculation_Functions::NaN();
    }
    return $retVal;
  }

  //	function DATEDIF()

  /**
   * 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])
   *
   * @access	public
   * @category Date/Time Functions
   * @param	mixed		$startDate		Excel date serial value (float), PHP date timestamp (integer),
   *										PHP DateTime object, or a standard date string
   * @param	mixed		$endDate		Excel date serial value (float), PHP date timestamp (integer),
   *										PHP DateTime object, or a standard date string
   * @param	boolean		$method			US or European Method
   *										FALSE or omitted: U.S. (NASD) method. If the starting date is
   *										the last day of a month, it becomes equal to the 30th of the
   *										same month. If the ending date is the last day of a month and
   *										the starting date is earlier than the 30th of a month, the
   *										ending date becomes equal to the 1st of the next month;
   *										otherwise the ending date becomes equal to the 30th of the
   *										same month.
   *										TRUE: European method. Starting dates and ending dates that
   *										occur on the 31st of a month become equal to the 30th of the
   *										same month.
   * @return	integer		Number of days between start date and end date
   */
  public static function DAYS360($startDate = 0, $endDate = 0, $method = false) {
    $startDate = PHPExcel_Calculation_Functions::flattenSingleValue($startDate);
    $endDate = PHPExcel_Calculation_Functions::flattenSingleValue($endDate);
    if (is_string($startDate = self::_getDateValue($startDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    if (is_string($endDate = self::_getDateValue($endDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    if (!is_bool($method)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }

    // Execute function
    $PHPStartDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($startDate);
    $startDay = $PHPStartDateObject
      ->format('j');
    $startMonth = $PHPStartDateObject
      ->format('n');
    $startYear = $PHPStartDateObject
      ->format('Y');
    $PHPEndDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($endDate);
    $endDay = $PHPEndDateObject
      ->format('j');
    $endMonth = $PHPEndDateObject
      ->format('n');
    $endYear = $PHPEndDateObject
      ->format('Y');
    return self::_dateDiff360($startDay, $startMonth, $startYear, $endDay, $endMonth, $endYear, !$method);
  }

  //	function DAYS360()

  /**
   * YEARFRAC
   *
   * Calculates the fraction of the year represented by the number of whole days between two dates
   * (the start_date and the end_date).
   * Use the YEARFRAC worksheet function to identify the proportion of a whole year's benefits or
   * obligations to assign to a specific term.
   *
   * Excel Function:
   *		YEARFRAC(startDate,endDate[,method])
   *
   * @access	public
   * @category Date/Time Functions
   * @param	mixed	$startDate		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @param	mixed	$endDate		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @param	integer	$method			Method used for the calculation
   *										0 or omitted	US (NASD) 30/360
   *										1				Actual/actual
   *										2				Actual/360
   *										3				Actual/365
   *										4				European 30/360
   * @return	float	fraction of the year
   */
  public static function YEARFRAC($startDate = 0, $endDate = 0, $method = 0) {
    $startDate = PHPExcel_Calculation_Functions::flattenSingleValue($startDate);
    $endDate = PHPExcel_Calculation_Functions::flattenSingleValue($endDate);
    $method = PHPExcel_Calculation_Functions::flattenSingleValue($method);
    if (is_string($startDate = self::_getDateValue($startDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    if (is_string($endDate = self::_getDateValue($endDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    if (is_numeric($method) && !is_string($method) || $method == '') {
      switch ($method) {
        case 0:
          return self::DAYS360($startDate, $endDate) / 360;
        case 1:
          $days = self::DATEDIF($startDate, $endDate);
          $startYear = self::YEAR($startDate);
          $endYear = self::YEAR($endDate);
          $years = $endYear - $startYear + 1;
          $leapDays = 0;
          if ($years == 1) {
            if (self::_isLeapYear($endYear)) {
              $startMonth = self::MONTHOFYEAR($startDate);
              $endMonth = self::MONTHOFYEAR($endDate);
              $endDay = self::DAYOFMONTH($endDate);
              if ($startMonth < 3 || $endMonth * 100 + $endDay >= 2 * 100 + 29) {
                $leapDays += 1;
              }
            }
          }
          else {
            for ($year = $startYear; $year <= $endYear; ++$year) {
              if ($year == $startYear) {
                $startMonth = self::MONTHOFYEAR($startDate);
                $startDay = self::DAYOFMONTH($startDate);
                if ($startMonth < 3) {
                  $leapDays += self::_isLeapYear($year) ? 1 : 0;
                }
              }
              elseif ($year == $endYear) {
                $endMonth = self::MONTHOFYEAR($endDate);
                $endDay = self::DAYOFMONTH($endDate);
                if ($endMonth * 100 + $endDay >= 2 * 100 + 29) {
                  $leapDays += self::_isLeapYear($year) ? 1 : 0;
                }
              }
              else {
                $leapDays += self::_isLeapYear($year) ? 1 : 0;
              }
            }
            if ($years == 2) {
              if ($leapDays == 0 && self::_isLeapYear($startYear) && $days > 365) {
                $leapDays = 1;
              }
              elseif ($days < 366) {
                $years = 1;
              }
            }
            $leapDays /= $years;
          }
          return $days / (365 + $leapDays);
        case 2:
          return self::DATEDIF($startDate, $endDate) / 360;
        case 3:
          return self::DATEDIF($startDate, $endDate) / 365;
        case 4:
          return self::DAYS360($startDate, $endDate, True) / 360;
      }
    }
    return PHPExcel_Calculation_Functions::VALUE();
  }

  //	function YEARFRAC()

  /**
   * NETWORKDAYS
   *
   * Returns the number of whole working days between start_date and end_date. Working days
   * exclude weekends and any dates identified in holidays.
   * Use NETWORKDAYS to calculate employee benefits that accrue based on the number of days
   * worked during a specific term.
   *
   * Excel Function:
   *		NETWORKDAYS(startDate,endDate[,holidays[,holiday[,...]]])
   *
   * @access	public
   * @category Date/Time Functions
   * @param	mixed			$startDate		Excel date serial value (float), PHP date timestamp (integer),
   *											PHP DateTime object, or a standard date string
   * @param	mixed			$endDate		Excel date serial value (float), PHP date timestamp (integer),
   *											PHP DateTime object, or a standard date string
   * @param	mixed			$holidays,...	Optional series of Excel date serial value (float), PHP date
   *											timestamp (integer), PHP DateTime object, or a standard date
   *											strings that will be excluded from the working calendar, such
   *											as state and federal holidays and floating holidays.
   * @return	integer			Interval between the dates
   */
  public static function NETWORKDAYS($startDate, $endDate) {

    //	Retrieve the mandatory start and end date that are referenced in the function definition
    $startDate = PHPExcel_Calculation_Functions::flattenSingleValue($startDate);
    $endDate = PHPExcel_Calculation_Functions::flattenSingleValue($endDate);

    //	Flush the mandatory start and end date that are referenced in the function definition, and get the optional days
    $dateArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
    array_shift($dateArgs);
    array_shift($dateArgs);

    //	Validate the start and end dates
    if (is_string($startDate = $sDate = self::_getDateValue($startDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $startDate = (double) floor($startDate);
    if (is_string($endDate = $eDate = self::_getDateValue($endDate))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $endDate = (double) floor($endDate);
    if ($sDate > $eDate) {
      $startDate = $eDate;
      $endDate = $sDate;
    }

    // Execute function
    $startDoW = 6 - self::DAYOFWEEK($startDate, 2);
    if ($startDoW < 0) {
      $startDoW = 0;
    }
    $endDoW = self::DAYOFWEEK($endDate, 2);
    if ($endDoW >= 6) {
      $endDoW = 0;
    }
    $wholeWeekDays = floor(($endDate - $startDate) / 7) * 5;
    $partWeekDays = $endDoW + $startDoW;
    if ($partWeekDays > 5) {
      $partWeekDays -= 5;
    }

    //	Test any extra holiday parameters
    $holidayCountedArray = array();
    foreach ($dateArgs as $holidayDate) {
      if (is_string($holidayDate = self::_getDateValue($holidayDate))) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
      if ($holidayDate >= $startDate && $holidayDate <= $endDate) {
        if (self::DAYOFWEEK($holidayDate, 2) < 6 && !in_array($holidayDate, $holidayCountedArray)) {
          --$partWeekDays;
          $holidayCountedArray[] = $holidayDate;
        }
      }
    }
    if ($sDate > $eDate) {
      return 0 - ($wholeWeekDays + $partWeekDays);
    }
    return $wholeWeekDays + $partWeekDays;
  }

  //	function NETWORKDAYS()

  /**
   * WORKDAY
   *
   * Returns the date that is the indicated number of working days before or after a date (the
   * starting date). Working days exclude weekends and any dates identified as holidays.
   * Use WORKDAY to exclude weekends or holidays when you calculate invoice due dates, expected
   * delivery times, or the number of days of work performed.
   *
   * Excel Function:
   *		WORKDAY(startDate,endDays[,holidays[,holiday[,...]]])
   *
   * @access	public
   * @category Date/Time Functions
   * @param	mixed		$startDate		Excel date serial value (float), PHP date timestamp (integer),
   *										PHP DateTime object, or a standard date string
   * @param	integer		$endDays		The number of nonweekend and nonholiday days before or after
   *										startDate. A positive value for days yields a future date; a
   *										negative value yields a past date.
   * @param	mixed		$holidays,...	Optional series of Excel date serial value (float), PHP date
   *										timestamp (integer), PHP DateTime object, or a standard date
   *										strings that will be excluded from the working calendar, such
   *										as state and federal holidays and floating holidays.
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function WORKDAY($startDate, $endDays) {

    //	Retrieve the mandatory start date and days that are referenced in the function definition
    $startDate = PHPExcel_Calculation_Functions::flattenSingleValue($startDate);
    $endDays = PHPExcel_Calculation_Functions::flattenSingleValue($endDays);

    //	Flush the mandatory start date and days that are referenced in the function definition, and get the optional days
    $dateArgs = PHPExcel_Calculation_Functions::flattenArray(func_get_args());
    array_shift($dateArgs);
    array_shift($dateArgs);
    if (is_string($startDate = self::_getDateValue($startDate)) || !is_numeric($endDays)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $startDate = (double) floor($startDate);
    $endDays = (int) floor($endDays);

    //	If endDays is 0, we always return startDate
    if ($endDays == 0) {
      return $startDate;
    }
    $decrementing = $endDays < 0 ? True : False;

    //	Adjust the start date if it falls over a weekend
    $startDoW = self::DAYOFWEEK($startDate, 3);
    if (self::DAYOFWEEK($startDate, 3) >= 5) {
      $startDate += $decrementing ? -$startDoW + 4 : 7 - $startDoW;
      $decrementing ? $endDays++ : $endDays--;
    }

    //	Add endDays
    $endDate = (double) $startDate + intval($endDays / 5) * 7 + $endDays % 5;

    //	Adjust the calculated end date if it falls over a weekend
    $endDoW = self::DAYOFWEEK($endDate, 3);
    if ($endDoW >= 5) {
      $endDate += $decrementing ? -$endDoW + 4 : 7 - $endDoW;
    }

    //	Test any extra holiday parameters
    if (!empty($dateArgs)) {
      $holidayCountedArray = $holidayDates = array();
      foreach ($dateArgs as $holidayDate) {
        if ($holidayDate !== NULL && trim($holidayDate) > '') {
          if (is_string($holidayDate = self::_getDateValue($holidayDate))) {
            return PHPExcel_Calculation_Functions::VALUE();
          }
          if (self::DAYOFWEEK($holidayDate, 3) < 5) {
            $holidayDates[] = $holidayDate;
          }
        }
      }
      if ($decrementing) {
        rsort($holidayDates, SORT_NUMERIC);
      }
      else {
        sort($holidayDates, SORT_NUMERIC);
      }
      foreach ($holidayDates as $holidayDate) {
        if ($decrementing) {
          if ($holidayDate <= $startDate && $holidayDate >= $endDate) {
            if (!in_array($holidayDate, $holidayCountedArray)) {
              --$endDate;
              $holidayCountedArray[] = $holidayDate;
            }
          }
        }
        else {
          if ($holidayDate >= $startDate && $holidayDate <= $endDate) {
            if (!in_array($holidayDate, $holidayCountedArray)) {
              ++$endDate;
              $holidayCountedArray[] = $holidayDate;
            }
          }
        }

        //	Adjust the calculated end date if it falls over a weekend
        $endDoW = self::DAYOFWEEK($endDate, 3);
        if ($endDoW >= 5) {
          $endDate += $decrementing ? -$endDoW + 4 : 7 - $endDoW;
        }
      }
    }
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        return (double) $endDate;
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        return (int) PHPExcel_Shared_Date::ExcelToPHP($endDate);
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        return PHPExcel_Shared_Date::ExcelToPHPObject($endDate);
    }
  }

  //	function WORKDAY()

  /**
   * DAYOFMONTH
   *
   * Returns the day of the month, for a specified date. The day is given as an integer
   * ranging from 1 to 31.
   *
   * Excel Function:
   *		DAY(dateValue)
   *
   * @param	mixed	$dateValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @return	int		Day of the month
   */
  public static function DAYOFMONTH($dateValue = 1) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    if ($dateValue === null) {
      $dateValue = 1;
    }
    elseif (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($dateValue == 0.0) {
      return 0;
    }
    elseif ($dateValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    return (int) $PHPDateObject
      ->format('j');
  }

  //	function DAYOFMONTH()

  /**
   * DAYOFWEEK
   *
   * Returns the day of the week for a specified date. The day is given as an integer
   * ranging from 0 to 7 (dependent on the requested style).
   *
   * Excel Function:
   *		WEEKDAY(dateValue[,style])
   *
   * @param	mixed	$dateValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @param	int		$style			A number that determines the type of return value
   *										1 or omitted	Numbers 1 (Sunday) through 7 (Saturday).
   *										2				Numbers 1 (Monday) through 7 (Sunday).
   *										3				Numbers 0 (Monday) through 6 (Sunday).
   * @return	int		Day of the week value
   */
  public static function DAYOFWEEK($dateValue = 1, $style = 1) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    $style = PHPExcel_Calculation_Functions::flattenSingleValue($style);
    if (!is_numeric($style)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($style < 1 || $style > 3) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    $style = floor($style);
    if ($dateValue === null) {
      $dateValue = 1;
    }
    elseif (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($dateValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    $DoW = $PHPDateObject
      ->format('w');
    $firstDay = 1;
    switch ($style) {
      case 1:
        ++$DoW;
        break;
      case 2:
        if ($DoW == 0) {
          $DoW = 7;
        }
        break;
      case 3:
        if ($DoW == 0) {
          $DoW = 7;
        }
        $firstDay = 0;
        --$DoW;
        break;
    }
    if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_EXCEL) {

      //	Test for Excel's 1900 leap year, and introduce the error as required
      if ($PHPDateObject
        ->format('Y') == 1900 && $PHPDateObject
        ->format('n') <= 2) {
        --$DoW;
        if ($DoW < $firstDay) {
          $DoW += 7;
        }
      }
    }
    return (int) $DoW;
  }

  //	function DAYOFWEEK()

  /**
   * WEEKOFYEAR
   *
   * Returns the week of the year for a specified date.
   * The WEEKNUM function considers the week containing January 1 to be the first week of the year.
   * However, there is a European standard that defines the first week as the one with the majority
   * of days (four or more) falling in the new year. This means that for years in which there are
   * three days or less in the first week of January, the WEEKNUM function returns week numbers
   * that are incorrect according to the European standard.
   *
   * Excel Function:
   *		WEEKNUM(dateValue[,style])
   *
   * @param	mixed	$dateValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @param	boolean	$method			Week begins on Sunday or Monday
   *										1 or omitted	Week begins on Sunday.
   *										2				Week begins on Monday.
   * @return	int		Week Number
   */
  public static function WEEKOFYEAR($dateValue = 1, $method = 1) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    $method = PHPExcel_Calculation_Functions::flattenSingleValue($method);
    if (!is_numeric($method)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($method < 1 || $method > 2) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    $method = floor($method);
    if ($dateValue === null) {
      $dateValue = 1;
    }
    elseif (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($dateValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    $dayOfYear = $PHPDateObject
      ->format('z');
    $dow = $PHPDateObject
      ->format('w');
    $PHPDateObject
      ->modify('-' . $dayOfYear . ' days');
    $dow = $PHPDateObject
      ->format('w');
    $daysInFirstWeek = 7 - ($dow + (2 - $method)) % 7;
    $dayOfYear -= $daysInFirstWeek;
    $weekOfYear = ceil($dayOfYear / 7) + 1;
    return (int) $weekOfYear;
  }

  //	function WEEKOFYEAR()

  /**
   * MONTHOFYEAR
   *
   * Returns the month of a date represented by a serial number.
   * The month is given as an integer, ranging from 1 (January) to 12 (December).
   *
   * Excel Function:
   *		MONTH(dateValue)
   *
   * @param	mixed	$dateValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @return	int		Month of the year
   */
  public static function MONTHOFYEAR($dateValue = 1) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    if ($dateValue === null) {
      $dateValue = 1;
    }
    elseif (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($dateValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    return (int) $PHPDateObject
      ->format('n');
  }

  //	function MONTHOFYEAR()

  /**
   * YEAR
   *
   * Returns the year corresponding to a date.
   * The year is returned as an integer in the range 1900-9999.
   *
   * Excel Function:
   *		YEAR(dateValue)
   *
   * @param	mixed	$dateValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard date string
   * @return	int		Year
   */
  public static function YEAR($dateValue = 1) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    if ($dateValue === null) {
      $dateValue = 1;
    }
    elseif (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    elseif ($dateValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    // Execute function
    $PHPDateObject = PHPExcel_Shared_Date::ExcelToPHPObject($dateValue);
    return (int) $PHPDateObject
      ->format('Y');
  }

  //	function YEAR()

  /**
   * HOUROFDAY
   *
   * Returns the hour of a time value.
   * The hour is given as an integer, ranging from 0 (12:00 A.M.) to 23 (11:00 P.M.).
   *
   * Excel Function:
   *		HOUR(timeValue)
   *
   * @param	mixed	$timeValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard time string
   * @return	int		Hour
   */
  public static function HOUROFDAY($timeValue = 0) {
    $timeValue = PHPExcel_Calculation_Functions::flattenSingleValue($timeValue);
    if (!is_numeric($timeValue)) {
      if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
        $testVal = strtok($timeValue, '/-: ');
        if (strlen($testVal) < strlen($timeValue)) {
          return PHPExcel_Calculation_Functions::VALUE();
        }
      }
      $timeValue = self::_getTimeValue($timeValue);
      if (is_string($timeValue)) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
    }

    // Execute function
    if ($timeValue >= 1) {
      $timeValue = fmod($timeValue, 1);
    }
    elseif ($timeValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    $timeValue = PHPExcel_Shared_Date::ExcelToPHP($timeValue);
    return (int) gmdate('G', $timeValue);
  }

  //	function HOUROFDAY()

  /**
   * MINUTEOFHOUR
   *
   * Returns the minutes of a time value.
   * The minute is given as an integer, ranging from 0 to 59.
   *
   * Excel Function:
   *		MINUTE(timeValue)
   *
   * @param	mixed	$timeValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard time string
   * @return	int		Minute
   */
  public static function MINUTEOFHOUR($timeValue = 0) {
    $timeValue = $timeTester = PHPExcel_Calculation_Functions::flattenSingleValue($timeValue);
    if (!is_numeric($timeValue)) {
      if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
        $testVal = strtok($timeValue, '/-: ');
        if (strlen($testVal) < strlen($timeValue)) {
          return PHPExcel_Calculation_Functions::VALUE();
        }
      }
      $timeValue = self::_getTimeValue($timeValue);
      if (is_string($timeValue)) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
    }

    // Execute function
    if ($timeValue >= 1) {
      $timeValue = fmod($timeValue, 1);
    }
    elseif ($timeValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    $timeValue = PHPExcel_Shared_Date::ExcelToPHP($timeValue);
    return (int) gmdate('i', $timeValue);
  }

  //	function MINUTEOFHOUR()

  /**
   * SECONDOFMINUTE
   *
   * Returns the seconds of a time value.
   * The second is given as an integer in the range 0 (zero) to 59.
   *
   * Excel Function:
   *		SECOND(timeValue)
   *
   * @param	mixed	$timeValue		Excel date serial value (float), PHP date timestamp (integer),
   *									PHP DateTime object, or a standard time string
   * @return	int		Second
   */
  public static function SECONDOFMINUTE($timeValue = 0) {
    $timeValue = PHPExcel_Calculation_Functions::flattenSingleValue($timeValue);
    if (!is_numeric($timeValue)) {
      if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
        $testVal = strtok($timeValue, '/-: ');
        if (strlen($testVal) < strlen($timeValue)) {
          return PHPExcel_Calculation_Functions::VALUE();
        }
      }
      $timeValue = self::_getTimeValue($timeValue);
      if (is_string($timeValue)) {
        return PHPExcel_Calculation_Functions::VALUE();
      }
    }

    // Execute function
    if ($timeValue >= 1) {
      $timeValue = fmod($timeValue, 1);
    }
    elseif ($timeValue < 0.0) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    $timeValue = PHPExcel_Shared_Date::ExcelToPHP($timeValue);
    return (int) gmdate('s', $timeValue);
  }

  //	function SECONDOFMINUTE()

  /**
   * EDATE
   *
   * Returns the serial number that represents the date that is the indicated number of months
   * before or after a specified date (the start_date).
   * Use EDATE to calculate maturity dates or due dates that fall on the same day of the month
   * as the date of issue.
   *
   * Excel Function:
   *		EDATE(dateValue,adjustmentMonths)
   *
   * @param	mixed	$dateValue			Excel date serial value (float), PHP date timestamp (integer),
   *										PHP DateTime object, or a standard date string
   * @param	int		$adjustmentMonths	The number of months before or after start_date.
   *										A positive value for months yields a future date;
   *										a negative value yields a past date.
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function EDATE($dateValue = 1, $adjustmentMonths = 0) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    $adjustmentMonths = PHPExcel_Calculation_Functions::flattenSingleValue($adjustmentMonths);
    if (!is_numeric($adjustmentMonths)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $adjustmentMonths = floor($adjustmentMonths);
    if (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }

    // Execute function
    $PHPDateObject = self::_adjustDateByMonths($dateValue, $adjustmentMonths);
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        return (double) PHPExcel_Shared_Date::PHPToExcel($PHPDateObject);
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        return (int) PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::PHPToExcel($PHPDateObject));
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        return $PHPDateObject;
    }
  }

  //	function EDATE()

  /**
   * EOMONTH
   *
   * Returns the date value for the last day of the month that is the indicated number of months
   * before or after start_date.
   * Use EOMONTH to calculate maturity dates or due dates that fall on the last day of the month.
   *
   * Excel Function:
   *		EOMONTH(dateValue,adjustmentMonths)
   *
   * @param	mixed	$dateValue			Excel date serial value (float), PHP date timestamp (integer),
   *										PHP DateTime object, or a standard date string
   * @param	int		$adjustmentMonths	The number of months before or after start_date.
   *										A positive value for months yields a future date;
   *										a negative value yields a past date.
   * @return	mixed	Excel date/time serial value, PHP date/time serial value or PHP date/time object,
   *						depending on the value of the ReturnDateType flag
   */
  public static function EOMONTH($dateValue = 1, $adjustmentMonths = 0) {
    $dateValue = PHPExcel_Calculation_Functions::flattenSingleValue($dateValue);
    $adjustmentMonths = PHPExcel_Calculation_Functions::flattenSingleValue($adjustmentMonths);
    if (!is_numeric($adjustmentMonths)) {
      return PHPExcel_Calculation_Functions::VALUE();
    }
    $adjustmentMonths = floor($adjustmentMonths);
    if (is_string($dateValue = self::_getDateValue($dateValue))) {
      return PHPExcel_Calculation_Functions::VALUE();
    }

    // Execute function
    $PHPDateObject = self::_adjustDateByMonths($dateValue, $adjustmentMonths + 1);
    $adjustDays = (int) $PHPDateObject
      ->format('d');
    $adjustDaysString = '-' . $adjustDays . ' days';
    $PHPDateObject
      ->modify($adjustDaysString);
    switch (PHPExcel_Calculation_Functions::getReturnDateType()) {
      case PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
        return (double) PHPExcel_Shared_Date::PHPToExcel($PHPDateObject);
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
        return (int) PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::PHPToExcel($PHPDateObject));
      case PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
        return $PHPDateObject;
    }
  }

}

//	class PHPExcel_Calculation_DateTime

Classes

Namesort descending Description
PHPExcel_Calculation_DateTime PHPExcel_Calculation_DateTime