ReactPHP -->文件上传--> $request->getUploadedFiles()返回空数组

use React\Http\Message\Response;
use React\Http\Server;
use React\Http\Request;
use React\Http\Stream;
use Psr\Http\Message\ServerRequestInterface;

require 'vendor/autoload.php';

$loop = \React\EventLoop\Factory::create();
$server = new Server($loop);

$server->on('request', function (ServerRequestInterface $request) {
    if ($request->getMethod() !== 'POST') {
        return new Response(405, ['Allow' => 'POST']);
    }

    $files = $request->getUploadedFiles();
    if (empty($files)) {
        return new Response(400, [], 'No files uploaded');
    }

    $file = reset($files);
    $fileStream = new Stream($file['tmp_name'], $loop);

    // 处理文件上传逻辑
    // ...

    return new Response(200, [], 'File uploaded successfully');
});

$socket = new \React\Socket\Server('127.0.0.1:8000', $loop);
$server->listen($socket);

echo 'Listening on ' . str_replace('tcp:', 'http:', $socket->getAddress()) . "\n";

$loop->run();