string(247) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%8E%A8%E5%B9%BF%E6%B8%B8%E6%88%8F%E5%B9%B3%E5%8F%B0%E7%9A%84%E6%96%B9%E6%B3%95 => Failed to connect to 61.171.74.35 port 38027: Connection refused"
推广游戏平台的方法
