PHP cURL CURLOPT_HTTPHEADER没有传递标题

Question

我无法通过PHP在cURL中传递HTTP标头。

我可以设置cookies，网址等，但我似乎无法通过CURLOPT_HTTPHEADER设置任何内容

$headers = array();
$headers[] = 'X-Crawlera-Cookies: disable';

$cookies = "test=1234; path=/";

curl_setopt($handles[$key], CURLOPT_URL,                $url);
curl_setopt($handles[$key], CURLOPT_HTTPHEADER,         $headers);
curl_setopt($handles[$key], CURLOPT_HEADER,             1);
curl_setopt($handles[$key], CURLOPT_RETURNTRANSFER,     1);
curl_setopt($handles[$key], CURLOPT_USERAGENT,          'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1)');
curl_setopt($handles[$key], CURLOPT_COOKIE,             $cookies);

其中输出以下内容：

HTTP/1.1 200 OK
Date: Sat, 24 Oct 2015 19:28:30 GMT
Server: Apache/2.4.12 (Amazon) PHP/5.6.10
X-Powered-By: PHP/5.6.10
Content-Length: 10
Content-Type: text/html; charset=UTF-8

如您所见，我正在运行PHP 5.6.10的AWS EC2实例上运行。

谢谢！