how to get hostname and URL clicked by client and save it in sql database

Question

hi,
i am using a open source search engine. and i want to get statistics of downloads by the client using my search engine.
my strategy is one a list of results for the searched query is listed in results page. and the client clicks on one link that particular link's visitor count is incremented by one. it has to be unique visitors to get the correct statistic. so one client clicks i am redirecting the page to my personal page where the url clicked will appear in the address bar here i plan to get the username and the url clicked into the database. and then the user is redirected back to the destination page he clicked for.  help me out.