, how does PHP get the content of the Web page? Not the same as normal.

Ask everyone, how does PHP get Web content? It's not the same as normal.!!!!!
is to obtain the content of the Web page, I mainly want to get a div inside the data, but the data here is he over a period of time and then through the JS to change the data inside the div ...
I use file_get_contents only to get to his first data ... After he changed the data by JS did not get to ....

Thank you, everyone.

------Solution--------------------
There is no way to get, PHP can not determine when the content of the page changed, and to crawl the data must be executed once a request, each request will only get the most original data
------Solution--------------------
Direct simulation of his AJAX access to data. Grab the packet and see what address curl is going to catch.
------Solution--------------------
Ajax can really:
Sets the trigger function to execute once every n seconds, which takes the data in the div and then passes it to the backend.

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