PHPSpreadSheet : Site can't be reach

Question

Try to export xlsx file using PhpSpreadSheet in CodeIgniter 3. When i run the url, it shows This site can't be reach. Web might be temporarily down or it may have moved permanently to a new web address.

Controller

require 'vendor/autoload.php';
                
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;

function generateLR(){
                    // create file name
  header('Content-Type: application/vnd.ms-excel');
  header('Content-Disposition: attachment;filename="result.xlsx');
  header('Cache-Control: max-age=0');
  $spreadsheet = new Spreadsheet();
  $sheet = $spreadsheet->getActiveSheet();
  $sheet->setCellValue('A1', 'Hello World !');
  $writer = new Xlsx($spreadsheet); 
  $writer->save('php://output');
}

But if i try to save locally $writer->save('hello world.xlsx'); . The output save successfully in project folder.

Also try using IOFactory but the result is the same: web is temporary down

require 'vendor/autoload.php';
                
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\IOFactory;

function generateLR(){
                    // create file name
  header('Content-Type: application/vnd.ms-excel');
  header('Content-Disposition: attachment;filename="result.xlsx');
  header('Cache-Control: max-age=0');
  $spreadsheet = new Spreadsheet();
  $sheet = $spreadsheet->getActiveSheet();
  $sheet->setCellValue('A1', 'Hello World !');
  $writer = IOFactory::createWriter($spreadsheet,'Xlsx');
  $writer->save('php://output');
}

Error image Is there any env problem?

Answer 1

Found the answer. The problem is the permission of sys_get_temp_dir() . My temp folder is unaccessable by default in Macbook. After change the permission. Excel can be created in localhost