php parse javascript generated text

let's say that on some site there are some div elements, which content is generated by javascript. I want to code a PHP s开发者_开发问答cript, that will get that content and store it to some variable. I know how to parse text using PHP, I just don't know how to get to the javascript generated output (not JavaScript code!) and store it to PHP variable. Any ideas?

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You could post the HTML back to your PHP script. Assuming that the javascript code fills out an element with id="foo"...

var generatedHTML = document.getElementById('foo').innerHTML;

Then you could use whatever AJAX library you might have (eg: jQuery) to post it to a server for processing.

(Or you could process it on the client side..!)