string(265) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E5%88%B6%E4%BD%9C%E7%BD%91%E9%A1%B5%E7%9A%84%E5%9F%BA%E6%9C%AC%E6%AD%A5%E9%AA%A4%E7%BC%96%E7%A8%8B => Failed to connect to 14.116.215.7 port 38225: Connection refused"
制作网页的基本步骤编程
