卷曲“无法连接到example.com端口443：连接超时”（HTTPS主机）

Question

我正在尝试使用CURL发送请求但是连接超时错误：

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_ENCODING, '');
curl_setopt($ch, CURLOPT_USERAGENT, 'ucn');
curl_setopt($ch, CURLOPT_AUTOREFERER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 1000);
curl_setopt($ch, CURLOPT_TIMEOUT, 1000);
curl_setopt($ch, CURLOPT_MAXREDIRS, 10);
curl_setopt($ch, CURLOPT_POSTFIELDS, $fields_string);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

我唯一的问题是它不适用于https://。我需要做些什么来使其适用于HTTPS？