controller basic

<?php
namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

//excel only
use PhpOffice\PhpSpreadsheet\IOFactory;

class ExcelController extends Controller
{
    function index(Request $request){
        //dd($request->all());
        $data = [];
        $aFile=[ ];
        foreach(glob(resource_path('excel'). DIRECTORY_SEPARATOR . "*.*") as $file){
            $aFile[]=$file;
        }
        $data['files'] = $aFile;

        return view('demo.index', $data);
    }

    function ex1(){
        $reader = IOFactory::createReader('Xlsx');
        //template
/*
buat folder excel di resources
masukkan file demo.xlsx kedalamnya
*/
        $template=resource_path('excel'). DIRECTORY_SEPARATOR .'demo.xlsx';

        $spreadsheet = $reader->load( $template);
header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');
header('Content-Disposition: attachment;filename="001template.xlsx"');
header('Cache-Control: max-age=0');
// If you're serving to IE 9, then the following may be needed
header('Cache-Control: max-age=1');

// If you're serving to IE over SSL, then the following may be needed
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT'); // Date in the past
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT'); // always modified
header('Cache-Control: cache, must-revalidate'); // HTTP/1.1
header('Pragma: public'); // HTTP/1.0

        $writer = IOFactory::createWriter($spreadsheet, 'Xlsx');
        $writer->save('php://output');

    }

}