phpspreadsheet in Codeigniter4

Hi, CI4 already knows where composer are located. This is how you load it inside an controller

PHP Code:

<?php
namespace App\Controllers;

use \PhpOffice\PhpSpreadsheet\Spreadsheet;
use \PhpOffice\PhpSpreadsheet\Writer\Xlsx;

class Example extends BaseController
{
    public function index()
    {
        $spreadsheet = new Spreadsheet();
        $sheet = $spreadsheet->getActiveSheet();
        $sheet->setCellValue('A1', 'Hello World !');
        $writer = new Xlsx($spreadsheet);
        $writer->save('hello world.xlsx');
    }
} 


PS. Moved your thread into CodeIgniter 4 Support.