为什么 PHP 函数在云原生开发中具有价值？

use GoogleCloudFunctionsCloudEvent;function helloWorld(CloudEvent $event){    printf("Hello, %s!", $event->getData()['name']);}

use GoogleCloudFunctionsFunctionsFramework;FunctionsFramework::http('greet', 'greetHttp');function greetHttp($request): string{    $name = $request->query('name') ?: 'World';    return sprintf('Hello, %s!', $name);}

use GoogleCloudFunctionsCloudEvent;use InterventionImageImageManager;function processImage(CloudEvent $event): void{    $data = $event->getData();    $manager = new ImageManager();    $image = $manager->make($data['file']); // 从 Pub/Sub 消息中获取图像文件    $image->resize(200, null, false); // 调整图像大小    $image->save($data['output']); // 保存处理后的图像到 Cloud Storage}