使用php语言来做表格，应该怎么做

// Include PHPExcel library and create its object
require('PHPExcel.php');
 
$phpExcel = new PHPExcel;
 
// Set default font to Arial
$phpExcel->getDefaultStyle()->getFont()->setName('Arial');
 
// Set default font size to 12
$phpExcel->getDefaultStyle()->getFont()->setSize(12);
 
// Set spreadsheet properties – title, creator and description
$phpExcel ->getProperties()->setTitle("Product list");
$phpExcel ->getProperties()->setCreator("Voja Janjic");
$phpExcel ->getProperties()->setDescription("PHP Excel spreadsheet testing.");
 
// Create the PHPExcel spreadsheet writer object
// We will create xlsx file (Excel 2007 and above)
$writer = PHPExcel_IOFactory::createWriter($phpExcel, "Excel2007");
 
// When creating the writer object, the first sheet is also created
// We will get the already created sheet
$sheet = $phpExcel ->getActiveSheet();
 
// Set sheet title
$sheet->setTitle('My product list');
 
// Create spreadsheet header
$sheet ->getCell('A1')->setValue('Product');
$sheet ->getCell('B1')->setValue('Quanity');
$sheet ->getCell('C1')->setValue('Price');
 
// Make the header text bold and larger
$sheet->getStyle('A1:D1')->getFont()->setBold(true)->setSize(14);
 
// Insert product data
 
 
// Autosize the columns
$sheet->getColumnDimension('A')->setAutoSize(true);
$sheet->getColumnDimension('B')->setAutoSize(true);
$sheet->getColumnDimension('C')->setAutoSize(true);
 
// Save the spreadsheet
$writer->save('products.xlsx');

header('Content-Type: application/vnd.ms-excel');
header('Content-Disposition: attachment;filename="file.xlsx"');
header('Cache-Control: max-age=0');
$writer->save('php://output');