使用curl發請post請求的時候，會遇到如下錯誤：
curl: (60) SSL certificate problem: self signed certificate
More details here: https://curl.haxx.se/docs/sslcerts.html
curl failed to verify the legitimacy of the server and therefore could not
establish a secure connection to it. To learn more about this situation and
how to fix it, please visit the web page mentioned above.
查看官網的解釋是說因為證書認證缺失，所以可以考慮請求里面關閉ssl證書認證，命令行中加上-k即可，如
curl -d "a=test1&b=fu&c=tet2" https://testtest.com/test/test2/getUserInfo -k
如果是在php代碼中，則需要加入下面的代碼：
if(substr($url,0,5) == 'https'){
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, true);
}