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Файл: protected/extensions/PHPExcel/Classes/PHPExcel/Calculation/DateTime.php
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<?php

/** PHPExcel root directory */
if (!defined('PHPEXCEL_ROOT')) {
    
/**
     * @ignore
     */
    
define('PHPEXCEL_ROOT'dirname(__FILE__) . '/../../');
    require(
PHPEXCEL_ROOT 'PHPExcel/Autoloader.php');
}

/**
 * PHPExcel_Calculation_DateTime
 *
 * Copyright (c) 2006 - 2015 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 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
 * @license        http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt    LGPL
 * @version        ##VERSION##, ##DATE##
 */
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));
    }


    
/**
     * 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 == && ($startDay == 29 || ($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;
    }


    
/**
     * 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;
    }


    
/**
     * 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;
    }


    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;
    }


    
/**
     * 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 = (float) PHPExcel_Shared_Date::PHPToExcel(time());
                break;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                
$retValue = (integer) time();
                break;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                
$retValue = new DateTime();
                break;
        }
        
date_default_timezone_set($saveTimeZone);

        return 
$retValue;
    }


    
/**
     * 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 = (float) $excelDateTime;
                break;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                
$retValue = (integer) PHPExcel_Shared_Date::ExcelToPHP($excelDateTime);
                break;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                
$retValue PHPExcel_Shared_Date::ExcelToPHPObject($excelDateTime);
                break;
        }
        
date_default_timezone_set($saveTimeZone);

        return 
$retValue;
    }


    
/**
     * 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    = (integer) $year;
        
$month    = (integer) $month;
        
$day    = (integer) $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 (float) 
$excelDateValue;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                return (integer) 
PHPExcel_Shared_Date::ExcelToPHP($excelDateValue);
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                return 
PHPExcel_Shared_Date::ExcelToPHPObject($excelDateValue);
        }
    }


    
/**
     * 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 = (integer) $hour;
        
$minute = (integer) $minute;
        
$second = (integer) $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) {
                    
$date 1;
                }
                return (float) 
PHPExcel_Shared_Date::FormattedPHPToExcel($calendar1$date$hour$minute$second);
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                return (integer) 
PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::FormattedPHPToExcel(197011$hour$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;
        }
    }


    
/**
     * 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($t11);
            } else {
                
array_push($t1date('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 (float) 
$excelDateValue;
                case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                    return (integer) 
PHPExcel_Shared_Date::ExcelToPHP($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();
    }


    
/**
     * 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 {
                
$excelDateValue PHPExcel_Shared_Date::FormattedPHPToExcel(190011$PHPDateArray['hour'], $PHPDateArray['minute'], $PHPDateArray['second']) - 1;
            }

            switch (
PHPExcel_Calculation_Functions::getReturnDateType()) {
                case 
PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
                    return (float) 
$excelDateValue;
                case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                    return (integer) 
$phpDateValue PHPExcel_Shared_Date::ExcelToPHP($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();
    }


    
/**
     * 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;
                }
                
//    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;
    }


    
/**
     * 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);
    }


    
/**
     * 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) >= (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)) ? 0;
                                }
                            } elseif (
$year == $endYear) {
                                
$endMonth self::MONTHOFYEAR($endDate);
                                
$endDay self::DAYOFMONTH($endDate);
                                if ((
$endMonth 100 $endDay) >= (100 29)) {
                                    
$leapDays += (self::isLeapYear($year)) ? 0;
                                }
                            } else {
                                
$leapDays += (self::isLeapYear($year)) ? 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$endDatetrue) / 360;
            }
        }
        return 
PHPExcel_Calculation_Functions::VALUE();
    }


    
/**
     * 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();
        }
        
$startDate = (float) floor($startDate);
        if (
is_string($endDate $eDate self::getDateValue($endDate))) {
            return 
PHPExcel_Calculation_Functions::VALUE();
        }
        
$endDate = (float) floor($endDate);

        if (
$sDate $eDate) {
            
$startDate $eDate;
            
$endDate $sDate;
        }

        
// Execute function
        
$startDoW self::DAYOFWEEK($startDate2);
        if (
$startDoW 0) {
            
$startDoW 0;
        }
        
$endDoW self::DAYOFWEEK($endDate2);
        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 <= $endDate)) {
                if ((
self::DAYOFWEEK($holidayDate2) < 6) && (!in_array($holidayDate$holidayCountedArray))) {
                    --
$partWeekDays;
                    
$holidayCountedArray[] = $holidayDate;
                }
            }
        }

        if (
$sDate $eDate) {
            return 
- ($wholeWeekDays $partWeekDays);
        }
        return 
$wholeWeekDays $partWeekDays;
    }


    
/**
     * 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();
        }
        
$startDate = (float) floor($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

        
$startDoW self::DAYOFWEEK($startDate3);
        if (
self::DAYOFWEEK($startDate3) >= 5) {
            
$startDate += ($decrementing) ? -$startDoW 4$startDoW;
            (
$decrementing) ? $endDays++ : $endDays--;
        }

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

        
//    Adjust the calculated end date if it falls over a weekend
        
$endDoW self::DAYOFWEEK($endDate3);
        if (
$endDoW >= 5) {
            
$endDate += ($decrementing) ? -$endDoW 4$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($holidayDate3) < 5) {
                        
$holidayDates[] = $holidayDate;
                    }
                }
            }
            if (
$decrementing) {
                
rsort($holidayDatesSORT_NUMERIC);
            } else {
                
sort($holidayDatesSORT_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
                
$endDoW self::DAYOFWEEK($endDate3);
                if (
$endDoW >= 5) {
                    
$endDate += ($decrementing) ? -$endDoW $endDoW;
                }
            }
        }

        switch (
PHPExcel_Calculation_Functions::getReturnDateType()) {
            case 
PHPExcel_Calculation_Functions::RETURNDATE_EXCEL:
                return (float) 
$endDate;
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                return (integer) 
PHPExcel_Shared_Date::ExcelToPHP($endDate);
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                return 
PHPExcel_Shared_Date::ExcelToPHPObject($endDate);
        }
    }


    
/**
     * 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');
    }


    
/**
     * 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;
    }


    
/**
     * 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');
        
$daysInFirstWeek - (($dow + ($method)) % 7);
        
$dayOfYear -= $daysInFirstWeek;
        
$weekOfYear ceil($dayOfYear 7) + 1;

        return (int) 
$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');
    }


    
/**
     * 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');
    }


    
/**
     * 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) {
            
$timeValue fmod($timeValue1);
        } elseif (
$timeValue 0.0) {
            return 
PHPExcel_Calculation_Functions::NaN();
        }
        
$timeValue PHPExcel_Shared_Date::ExcelToPHP($timeValue);

        return (int) 
gmdate('G'$timeValue);
    }


    
/**
     * 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) {
            
$timeValue fmod($timeValue1);
        } elseif (
$timeValue 0.0) {
            return 
PHPExcel_Calculation_Functions::NaN();
        }
        
$timeValue PHPExcel_Shared_Date::ExcelToPHP($timeValue);

        return (int) 
gmdate('i'$timeValue);
    }


    
/**
     * 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) {
            
$timeValue fmod($timeValue1);
        } elseif (
$timeValue 0.0) {
            return 
PHPExcel_Calculation_Functions::NaN();
        }
        
$timeValue PHPExcel_Shared_Date::ExcelToPHP($timeValue);

        return (int) 
gmdate('s'$timeValue);
    }


    
/**
     * 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 (float) 
PHPExcel_Shared_Date::PHPToExcel($PHPDateObject);
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                return (integer) 
PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::PHPToExcel($PHPDateObject));
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                return 
$PHPDateObject;
        }
    }


    
/**
     * 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 (float) 
PHPExcel_Shared_Date::PHPToExcel($PHPDateObject);
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_NUMERIC:
                return (integer) 
PHPExcel_Shared_Date::ExcelToPHP(PHPExcel_Shared_Date::PHPToExcel($PHPDateObject));
            case 
PHPExcel_Calculation_Functions::RETURNDATE_PHP_OBJECT:
                return 
$PHPDateObject;
        }
    }
}
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