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<?php |
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namespace PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel; |
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use PhpOffice\PhpSpreadsheet\Calculation\Exception; |
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use PhpOffice\PhpSpreadsheet\Calculation\Functions; |
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use PhpOffice\PhpSpreadsheet\Shared\Date as SharedDateHelper; |
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class YearFrac |
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{ |
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/** |
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* YEARFRAC. |
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* |
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* Calculates the fraction of the year represented by the number of whole days between two dates |
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* (the start_date and the end_date). |
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* Use the YEARFRAC worksheet function to identify the proportion of a whole year's benefits or |
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* obligations to assign to a specific term. |
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* |
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* Excel Function: |
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* YEARFRAC(startDate,endDate[,method]) |
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* See https://lists.oasis-open.org/archives/office-formula/200806/msg00039.html |
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* for description of algorithm used in Excel |
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* |
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* @param mixed $startDate Excel date serial value (float), PHP date timestamp (integer), |
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* PHP DateTime object, or a standard date string |
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* @param mixed $endDate Excel date serial value (float), PHP date timestamp (integer), |
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* PHP DateTime object, or a standard date string |
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* @param int $method Method used for the calculation |
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* 0 or omitted US (NASD) 30/360 |
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* 1 Actual/actual |
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* 2 Actual/360 |
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* 3 Actual/365 |
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* 4 European 30/360 |
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* |
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* @return float|string fraction of the year, or a string containing an error |
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*/ |
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public static function fraction($startDate, $endDate, $method = 0) |
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{ |
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try { |
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$method = (int) Helpers::validateNumericNull($method); |
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$sDate = Helpers::getDateValue($startDate); |
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$eDate = Helpers::getDateValue($endDate); |
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$sDate = self::excelBug($sDate, $startDate, $endDate, $method); |
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$eDate = self::excelBug($eDate, $endDate, $startDate, $method); |
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$startDate = min($sDate, $eDate); |
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$endDate = max($sDate, $eDate); |
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} catch (Exception $e) { |
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return $e->getMessage(); |
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} |
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switch ($method) { |
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case 0: |
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return Days360::between($startDate, $endDate) / 360; |
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case 1: |
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return self::method1($startDate, $endDate); |
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case 2: |
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return Difference::interval($startDate, $endDate) / 360; |
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case 3: |
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return Difference::interval($startDate, $endDate) / 365; |
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case 4: |
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return Days360::between($startDate, $endDate, true) / 360; |
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} |
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return Functions::NAN(); |
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} |
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/** |
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* Excel 1900 calendar treats date argument of null as 1900-01-00. Really. |
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* |
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* @param mixed $startDate |
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* @param mixed $endDate |
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*/ |
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private static function excelBug(float $sDate, $startDate, $endDate, int $method): float |
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{ |
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if (Functions::getCompatibilityMode() !== Functions::COMPATIBILITY_OPENOFFICE && SharedDateHelper::getExcelCalendar() !== SharedDateHelper::CALENDAR_MAC_1904) { |
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if ($endDate === null && $startDate !== null) { |
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if (DateParts::month($sDate) == 12 && DateParts::day($sDate) === 31 && $method === 0) { |
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$sDate += 2; |
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} else { |
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++$sDate; |
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} |
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} |
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} |
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return $sDate; |
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} |
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private static function method1(float $startDate, float $endDate): float |
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{ |
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$days = Difference::interval($startDate, $endDate); |
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$startYear = (int) DateParts::year($startDate); |
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$endYear = (int) DateParts::year($endDate); |
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$years = $endYear - $startYear + 1; |
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$startMonth = (int) DateParts::month($startDate); |
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$startDay = (int) DateParts::day($startDate); |
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$endMonth = (int) DateParts::month($endDate); |
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$endDay = (int) DateParts::day($endDate); |
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$startMonthDay = 100 * $startMonth + $startDay; |
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$endMonthDay = 100 * $endMonth + $endDay; |
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if ($years == 1) { |
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$tmpCalcAnnualBasis = 365 + (int) Helpers::isLeapYear($endYear); |
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} elseif ($years == 2 && $startMonthDay >= $endMonthDay) { |
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if (Helpers::isLeapYear($startYear)) { |
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$tmpCalcAnnualBasis = 365 + (int) ($startMonthDay <= 229); |
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} elseif (Helpers::isLeapYear($endYear)) { |
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$tmpCalcAnnualBasis = 365 + (int) ($endMonthDay >= 229); |
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} else { |
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$tmpCalcAnnualBasis = 365; |
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} |
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} else { |
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$tmpCalcAnnualBasis = 0; |
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for ($year = $startYear; $year <= $endYear; ++$year) { |
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$tmpCalcAnnualBasis += 365 + (int) Helpers::isLeapYear($year); |
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} |
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$tmpCalcAnnualBasis /= $years; |
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} |
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return $days / $tmpCalcAnnualBasis; |
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} |
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} |
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PHPOffice /
PhpSpreadsheet
