Write data from array to sheet using phpspreadsheet library
Also, you have the wrong Content-Type header...
For BIFF .xls files
application/vnd.ms-excelFor Excel2007 and above .xlsx files
application/vnd.openxmlformats-officedocument.spreadsheetml.sheetSo, fully working code should looks like this:
// $header is an array containing column headers $header = [array("Customer Number", "Customer Name", "Address", "City", "State", "Zip")]; $spreadsheet = new Spreadsheet(); $sheet = $spreadsheet->getActiveSheet(); $sheet->fromArray($header, NULL, 'A1'); // redirect output to client browser header('Content-Disposition: attachment;filename="myfile.xlsx"'); header('Cache-Control: max-age=0'); $writer = new Xlsx($spreadsheet); $writer->save('php://output');
You need to include the namespace
$spreadsheet = new \PhpOffice\PhpSpreadsheet\Spreadsheet(); $writer = new \PhpOffice\PhpSpreadsheet\Writer\Xlsx($spreadsheet);