Symfony 事件 addListener 和变量 Scope/State

Question

我目前正在使用 sitl/curl-easy 来制作多卷曲并行请求，但我在范围/状态方面遇到了一些困难：

// Init queue of requests
$queue = new \cURL\RequestsQueue;

...初始化队列选项

// Set function to be executed when request will be completed
$queue->addListener('complete', function (\cURL\Event $event) 
{
    $response = $event->response->getContent();

    // ugly :D, get the key from the object request
    $key = explode("&key=", array_values($event->request->getOptions()->toArray())[0])[1];

    // if response is not null, truncate it to use less space 
    if ($response != null){
        $response = str_replace(array("\r", "\n"), "", $response);
    }

    >>>>>>>> DON'T WORK, $banner_holder is declared on the top of the php page
    array_push($banner_holder, array("key"=> $key,"content"=>$response));
});

如何将 $key 和 $response 的数组推送到监听器之外？

提前致谢。

Answer 1

由于您使用的是闭包函数，因此您需要指定要像这样“使用”$banner_holder 数组

$queue->addListener('complete', function (\cURL\Event $event) use ($banner_holder) {