xny/vendor/phpoffice/phpspreadsheet/samples/Calculations/Financial/DISC.php

<?php

use PhpOffice\PhpSpreadsheet\Calculation\DateTimeExcel\Helpers as DateHelper;
use PhpOffice\PhpSpreadsheet\Spreadsheet;

require __DIR__ . '/../../Header.php';

$helper->log('Returns the the Discount Rate for a security.');

// Create new PhpSpreadsheet object
$spreadsheet = new Spreadsheet();
$worksheet = $spreadsheet->getActiveSheet();

// Add some data
$arguments = [
    ['Settlement Date', DateHelper::getDateValue('01-Apr-2016')],
    ['Maturity Date', DateHelper::getDateValue('31-Mar-2021')],
    ['Par Value', 95.00],
    ['Redemption Value', 100.00],
];

// Some basic formatting for the data
$worksheet->fromArray($arguments, null, 'A1');
$worksheet->getStyle('B1:B2')->getNumberFormat()->setFormatCode('dd-mmm-yyyy');
$worksheet->getStyle('B3:B4')->getNumberFormat()->setFormatCode('$#,##0.00');

// Now the formula
$worksheet->setCellValue('B7', '=DISC(B1, B2, B3, B4)');
$worksheet->getStyle('B7')->getNumberFormat()->setFormatCode('0.00%');

$helper->log($worksheet->getCell('B7')->getValue());
$helper->log('DISC() Result is ' . $worksheet->getCell('B7')->getFormattedValue());