SEO Tools: Advanced position checkerI've just finished developing a stable release of quite an advanced SEO tool, I called it "position checker".
What it does is it crawls the selected search engines upon a list of given queries, and it tries to find matches with your site. If it finds them it tells you on which page and where was it linking.
It is pretty fast, and it allows you to easily know how well your website ranks for certain search queries.

Visit the advanced position checker

How it works:

It uses a lot of arrays to store the information, since it helped me a lot simplifying the task of handling multiple streams of information and comparing them looking for matches.
To crawl and extract the links I've used a class I've found at php classes, which is based in curl.

The full code and test page can be downloaded here:

If you have any suggestion, comment, or improvement for this idea, please comment!