titles($category, $functionName, $description); // Create new PhpSpreadsheet object $spreadsheet = new Spreadsheet(); $worksheet = $spreadsheet->getActiveSheet(); // Add some data $testData = [ [3], [7], [42], [70], [72], [77], [100], [127], [177], [456], [567], ]; $testDataCount = count($testData); $worksheet->fromArray($testData, null, 'A1', true); for ($row = 1; $row <= $testDataCount; ++$row) { $worksheet->setCellValue('B' . $row, '=OCT2BIN(A' . $row . ')'); } // Test the formulae for ($row = 1; $row <= $testDataCount; ++$row) { $helper->log(sprintf( '(B%d): Octal %s is binary %s', $row, $worksheet->getCell('A' . $row)->getValue(), $worksheet->getCell('B' . $row)->getCalculatedValue(), )); }