public static function PHPExcel_Calculation_Financial::NPER in Loft Data Grids 6.2

Same name and namespace in other branches

1. 7.2 vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Financial.php \PHPExcel_Calculation_Financial::NPER()

* NPER * * Returns the number of periods for a cash flow with constant periodic payments (annuities), and interest rate. * *

Parameters

float $rate Interest rate per period: * @param int $pmt Periodic payment (annuity) * @param float $pv Present Value * @param float $fv Future Value * @param int $type Payment type: 0 = at the end of each period, 1 = at the beginning of each period * @return float

File

vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Financial.php, line 1500

Class

PHPExcel_Calculation_Financial

PHPExcel_Calculation_Financial

Code

public static function NPER($rate = 0, $pmt = 0, $pv = 0, $fv = 0, $type = 0) {
  $rate = PHPExcel_Calculation_Functions::flattenSingleValue($rate);
  $pmt = PHPExcel_Calculation_Functions::flattenSingleValue($pmt);
  $pv = PHPExcel_Calculation_Functions::flattenSingleValue($pv);
  $fv = PHPExcel_Calculation_Functions::flattenSingleValue($fv);
  $type = PHPExcel_Calculation_Functions::flattenSingleValue($type);

  // Validate parameters
  if ($type != 0 && $type != 1) {
    return PHPExcel_Calculation_Functions::NaN();
  }

  // Calculate
  if (!is_null($rate) && $rate != 0) {
    if ($pmt == 0 && $pv == 0) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    return log(($pmt * (1 + $rate * $type) / $rate - $fv) / ($pv + $pmt * (1 + $rate * $type) / $rate)) / log(1 + $rate);
  }
  else {
    if ($pmt == 0) {
      return PHPExcel_Calculation_Functions::NaN();
    }
    return (-$pv - $fv) / $pmt;
  }
}