string(269) "get document error：https://zhidao.baidu.com/search?lm=0&rn=10&pn=0&fr=search&dyTabStr=null&word=%E4%BA%8C%E7%BB%B4%E7%A0%81id%E6%9C%89%E4%BB%80%E4%B9%88%E7%94%A8%E9%80%94%E5%92%8C%E5%8A%9F%E8%83%BD => Failed to connect to 101.89.159.206 port 38187: Connection refused"
二维码id有什么用途和功能
