在项目根目录下使用composer安装
composer require phpoffice/phpspreadsheet:1.6.*
phpexcel不在维护，推荐使用phpspreadsheet
<?php
require '../vendor/autoload.php';
use PhpOffice\PhpSpreadsheet\Spreadsheet;
use PhpOffice\PhpSpreadsheet\Writer\Xlsx;
$spreadsheet = new Spreadsheet();
$sheet = $spreadsheet->getActiveSheet();
$sheet->setCellValue('A1', 'Hello World !');
$writer = new Xlsx($spreadsheet);
$writer->save('world.xlsx'); 