Google Page Rank Checker is a PHP class that can be used to retrieve the Google page rank of a page with a given URL. Page rank is a family of algorithms for assigning numerical weights to hyperlinked documents (or Web pages) indexed by a search engine. The page rank system is used by the popular search engine Google to help determine the relevance of a page. This class accesses the Google servers and queries the page rank of a given URL. The page rank value returned by the class is a number between 0 and 10.