In this article, we’ll see the basics of a wide spread and useful technique, so called l’url rewrite. It deals with one of the Apache’s functionality made possible with the module mod_rewrite, implementable and configurable through our old friend: the files: .htaccess. The major benefit in rewriting the url is a better indexation from the search engines. It seems in fact that the spider are disturbed by the query string (?id=34&type=5&mod=user), particularly if they pass many parameters. Are you ready to enter in this mysterious and interesting field of the web?