PHP和swoole如何实现高并发的图片上传和处理？

<?php

// 创建HTTP服务器
$http = new swoole_http_server("0.0.0.0", 9501);

// 设置上传文件存储目录
$uploadDir = '/var/www/uploads/';

// 处理请求
$http->on('request', function ($request, $response) use ($uploadDir) {
    // 处理上传的图片
    if ($request->files) {
        $file = $request->files['file'];
        $fileName = $file['name'];
        $tmpName = $file['tmp_name'];
        $errorCode = $file['error'];

        if ($errorCode === UPLOAD_ERR_OK) {
            $uploadFile = $uploadDir . $fileName;
            // 将临时文件保存到指定目录
            if(move_uploaded_file($tmpName, $uploadFile)) {
                // 对上传的图片进行处理
                // TODO: 图片处理代码
                // 处理完成后，返回处理后的图片
                $response->header('Content-Type', 'image/jpeg');
                $response->sendfile($uploadFile);
            } else {
                $response->end("File upload failed.
");
            }
        } else {
            $response->end("File upload error.
");
        }
    } else {
        $response->end("No file uploaded.
");
    }
});

// 启动HTTP服务器
$http->start();