Php 从Symfony\Component\HttpFoundation\Response获取标题

出于调试目的，我希望将响应对象中的所有头记录在filters.php中：

App::after(function($request, $response) {
  if(App::environment() !== 'dev') { return; }

  error_log(print_r($response->getHeadersPleaaase()));

---

$response

通常是

illumb\Http\JsonResponse

，我找不到任何明显的方法来获取标题。

标题是公共属性：

error_log(print_r($response->headers));

ini\u集（“日志错误”，1）；
ini_集合（“错误_日志”，“目录”/../app/logs/prod.log”）//ini_集（“错误日志”，您的路径和文件）；
错误日志（'BEGIN========>'）；
错误日志（$request）；
错误日志（$response）；
错误日志（'
ini_set("log_errors", 1);
ini_set("error_log", __DIR__.'/../app/logs/prod.log');//ini_set("error_log", your path and file);
error_log( 'BEGIN===========>' );
error_log( $request );
error_log( $response );
error_log( '<========END' );

<?php

use Symfony\Component\ClassLoader\ApcClassLoader;
use Symfony\Component\HttpFoundation\Request;

$loader = require_once __DIR__.'/../app/bootstrap.php.cache';

// Use APC for autoloading to improve performance.
// Change 'sf2' to a unique prefix in order to prevent cache key conflicts
// with other applications also using APC.
/*
$apcLoader = new ApcClassLoader('sf2', $loader);
$loader->unregister();
$apcLoader->register(true);
*/

require_once __DIR__.'/../app/AppKernel.php';
//require_once __DIR__.'/../app/AppCache.php';

$kernel = new AppKernel('prod', false);
$kernel->loadClassCache();
//$kernel = new AppCache($kernel);

// When using the HttpCache, you need to call the method in your front controller instead of relying on the configuration parameter
//Request::enableHttpMethodParameterOverride();
$request = Request::createFromGlobals();
$response = $kernel->handle($request);

ini_set("log_errors", 1);
ini_set("error_log", __DIR__.'/../app/logs/prod.log');
error_log( 'BEGIN===========>' );
error_log( $request );
error_log( $response );
error_log( '<========END' );

$response->send();
$kernel->terminate($request, $response);