string(285) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E6%9C%89%E4%BB%80%E4%B9%88%E5%B9%B3%E5%8F%B0%E5%8F%AF%E4%BB%A5%E9%80%9A%E8%BF%87%E6%B5%81%E9%87%8F%E8%B5%9A%E9%92%B1 => Failed to connect to 125.88.227.171 port 38062: Connection refused"
有什么平台可以通过流量赚钱
