curl 使用时，设置代理问题！

Question

先上代码

 public static function curl_get_https($url){
        echo $url;
        $curl = curl_init(); // 启动一个CURL会话
        curl_setopt($curl, CURLOPT_URL, $url);
        curl_setopt($curl, CURLOPT_HEADER, 0);
        curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // 跳过证书检查
        curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);  // 从证书中检查SSL加密算法是否存在

        curl_setopt($curl, CURLOPT_RETURNTRANSFER,1);
        curl_setopt($curl,CURLOPT_PROXY,'123.163.160.171');
        curl_setopt($curl,CURLOPT_PROXYPORT,'8787');
        curl_setopt ($curl, CURLOPT_TIMEOUT, 20);

        $tmpInfo = curl_exec($curl);     //返回api的json对象

        curl_close($curl);
        return $tmpInfo;    //返回json对象
    }

执行时报错信息

Proxy CONNECT aborted due to timeout

Answer 1

代理服务器连接不上