CURL怎么获取HTTPS协议的状态码

CURL如何获取HTTPS协议的状态码

$curl = curl_init();
$url='https://';
curl_setopt($curl, CURLOPT_URL, $url); 
curl_setopt($curl, CURLOPT_HEADER, 1); 
curl_setopt($curl,CURLOPT_NOBODY,true); 
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1); 
$data = curl_exec($curl); 
echo curl_getinfo($curl,CURLINFO_HTTP_CODE); 
curl_close($curl); 

我用这种方法打印出http的状态码没问题，但是换成https协议一直输出0. 请问https应该怎么获取
------解决思路----------------------
https 請求時要加上
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 从证书中检查SSL加密算法是否存在

/** curl 获取 https 请求
* @param String $url        请求的url
* @param Array  $data       要發送的數據
* @param Array  $header     请求时发送的header
* @param int    $timeout    超时时间，默认30s
*/
function curl_https($url, $data=array(), $header=array(), $timeout=30){

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 跳过证书检查
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false);  // 从证书中检查SSL加密算法是否存在
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_HTTPHEADER, $header);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($data));
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); 
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);

    $response = curl_exec($ch);

	$code = curl_getinfo($ch, CURLINFO_HTTP_CODE);

    if($error=curl_error($ch)){
        die($error);
    }

    curl_close($ch);

    return array($code,$response);

}

// 调用
$url = 'https://example.com/message.php';
$data = array('name'=>'fdipzone');
$header = array();

list($code, $response) = curl_https($url, $data, $header, 5);

echo $code;
echo $response;
?>