I've searched a couple posts on the subject, but really did not come up with a definitive answer. If I'm looking for the following to be indexed: /signup.php but NOT the following to be indexed: /signup.php?promotioncode=FREE30 would the following syntax in the robots.txt allow for the indexing of the signup.php page but not the query string? User-Agent: * Disallow: /signup.php?*$ Any feedback or suggestions are much appreciated!