curl如何获取https中的内容

$ch = curl_init();
$url = 'https://www.kanjian.com';
curl_setopt($ch, CURLOPT_URL, $url);

curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

//主要是加上下面的两个,,据说不安全哦

curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, FALSE);

$res = curl_exec($ch);

curl_close($ch);
var_dump($res);