public static function PHPExcel_Calculation_Financial::DB 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::DB()

* DB * * Returns the depreciation of an asset for a specified period using the * fixed-declining balance method. * This form of depreciation is used if you want to get a higher depreciation value * at the beginning of the depreciation (as opposed to linear depreciation). The * depreciation value is reduced with every depreciation period by the depreciation * already deducted from the initial cost. * * Excel Function: * DB(cost,salvage,life,period[,month]) * * @access public * @category Financial Functions *

Parameters

float cost Initial cost of the asset.: * @param float salvage Value at the end of the depreciation. * (Sometimes called the salvage value of the asset) * @param integer life Number of periods over which the asset is depreciated. * (Sometimes called the useful life of the asset) * @param integer period The period for which you want to calculate the * depreciation. Period must use the same units as life. * @param integer month Number of months in the first year. If month is omitted, * it defaults to 12. * @return float

File

vendor/phpoffice/phpexcel/Classes/PHPExcel/Calculation/Financial.php, line 908

Class

PHPExcel_Calculation_Financial

PHPExcel_Calculation_Financial

Code

public static function DB($cost, $salvage, $life, $period, $month = 12) {
  $cost = PHPExcel_Calculation_Functions::flattenSingleValue($cost);
  $salvage = PHPExcel_Calculation_Functions::flattenSingleValue($salvage);
  $life = PHPExcel_Calculation_Functions::flattenSingleValue($life);
  $period = PHPExcel_Calculation_Functions::flattenSingleValue($period);
  $month = PHPExcel_Calculation_Functions::flattenSingleValue($month);

  //	Validate
  if (is_numeric($cost) && is_numeric($salvage) && is_numeric($life) && is_numeric($period) && is_numeric($month)) {
    $cost = (double) $cost;
    $salvage = (double) $salvage;
    $life = (int) $life;
    $period = (int) $period;
    $month = (int) $month;
    if ($cost == 0) {
      return 0.0;
    }
    elseif ($cost < 0 || $salvage / $cost < 0 || $life <= 0 || $period < 1 || $month < 1) {
      return PHPExcel_Calculation_Functions::NaN();
    }

    //	Set Fixed Depreciation Rate
    $fixedDepreciationRate = 1 - pow($salvage / $cost, 1 / $life);
    $fixedDepreciationRate = round($fixedDepreciationRate, 3);

    //	Loop through each period calculating the depreciation
    $previousDepreciation = 0;
    for ($per = 1; $per <= $period; ++$per) {
      if ($per == 1) {
        $depreciation = $cost * $fixedDepreciationRate * $month / 12;
      }
      elseif ($per == $life + 1) {
        $depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate * (12 - $month) / 12;
      }
      else {
        $depreciation = ($cost - $previousDepreciation) * $fixedDepreciationRate;
      }
      $previousDepreciation += $depreciation;
    }
    if (PHPExcel_Calculation_Functions::getCompatibilityMode() == PHPExcel_Calculation_Functions::COMPATIBILITY_GNUMERIC) {
      $depreciation = round($depreciation, 2);
    }
    return $depreciation;
  }
  return PHPExcel_Calculation_Functions::VALUE();
}