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I have used phantomjs (with casperjs) for scrapping a website, it was complete nightmare.

1. It use javascript to script so writting sequential code wasn't possible so the code ended up using continuation passing style.

2. The very first example snippet on the front page don't work in the repl (https://github.com/ariya/phantomjs/issues/11180). So the repl is useless.

3. When an error occur in your script (not the one on the webpage) there is no message anywhere no matter what you do.

My mistake was to continue with phantomjs the hype around made me think others options would have been worst.

I have used selenium+firefox+php to do a quick test it was wayyyy better, just for n°1 using sequential php remove a lot headaches.