string(231) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E7%BD%91%E7%AB%99%E5%81%9A%E6%8E%92%E5%90%8D%E6%96%B9%E6%B3%95 => Failed to connect to 101.89.117.144 port 38208: Connection refused"
网站做排名方法
