// You can save the file on the server:
// $writer->save('hello world.xlsx');

// Or you can send the file directly to the browser so user can download it:
// header('Content-Type: application/vnd.ms-excel'); // This is probably for older XLS files. header('Content-Type: application/application/vnd.openxmlformats-officedocument.spreadsheetml.sheet'); // This is for XLSX files (they are basically zip files). header('Content-Disposition: attachment;filename="filename.xlsx"'); $writer->save($outputFileName'hello world.xlsx'); exit(); ```