How can you access the completely rendered DOM source of a URL with PHP?

I'd like to access the rendered DOM of a page, after JavaScript has run and modified the page source, with PHP. I can ac开发者_C百科cess the raw code with CURL, but what I;d like is to access the code similar to the way Firefox's Examine Element feature works, so I can process the actual HTML output by Javascript functions and not just the Javascript code itself. Are there any PHP libraries that can do this?

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Check out the "headless browser" section.

It's a good place to start.