php-excel/test.php

<?php

require 'vendor/autoload.php';

$spreadsheet = new PhpOffice\PhpSpreadsheet\Spreadsheet();
$sheet       = $spreadsheet->getActiveSheet();
$sheet->setCellValue('A1', 'Hello World !');

$writer = new PhpOffice\PhpSpreadsheet\Writer\Xlsx($spreadsheet);
$writer->save('hello world.xlsx');