利用php+curl技术来模拟网页发送post请求，登陆网站(Using php+curl technology to simulate web pages to send post request, landing site)

php模拟登录，达到下载网络上面的一个HTTPS的资源，或者通过调用WebService查询北京的当前天气(PHP simulates login, reaches a HTTPS resource on the top of the network or calls WebService to query the current weather in Beijing.)