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], [4567], [7777700001], [7777776543], ]; $testDataCount = count($testData); $worksheet->fromArray($testData, null, 'A1', true); for ($row = 1; $row <= $testDataCount; ++$row) { $worksheet->setCellValue('B' . $row, '=OCT2DEC(A' . $row . ')'); } // Test the formulae for ($row = 1; $row <= $testDataCount; ++$row) { $helper->log( "(B$row): " . 'Octal ' . $worksheet->getCell("A$row")->getValueString() . ' is decimal ' . $worksheet->getCell("B$row")->getCalculatedValueString() ); }