PHP and jQuery progress bar while parsing

Question

I was wondering how I could go about making a progress bar for parsing HTML data. Essentially the user searches something and I parse another website. I tried doing it with

Answer 1

Executing length php process while showing progress, even having multiple progress bars on same page and pre/post hooks: http://pastebin.com/KSxjC01r

I've done it for myself, because I need it.

Feel free to use it.