hyperf-chat/app/Controller/IndexController.php

<?php
declare(strict_types=1);

namespace App\Controller;

use Hyperf\HttpServer\Contract\ResponseInterface;

class IndexController extends AbstractController
{
    public function index(ResponseInterface $response)
    {
        $user   = $this->request->input('user', 'Hyperf');
        $method = $this->request->getMethod();

        return [
            'method'  => $method,
            'message' => "Hello {$user}.",
        ];
    }
}