Apache's ErrorDocument directive can come in handy. For example, this line in your Apache configuration file: ErrorDocument 404 /error.php Can be used to redirect all 404 errors to a PHP script. The following server variables are of interest: $REDIRECT_ERROR_NOTES - File does not exist: /docroot/bogus $REDIRECT_REQUEST_METHOD - GET $REDIRECT_STATUS - 404 $REDIRECT_URL - /docroot/bogus Don't forget to send a 404 status if you choose not to redirect to a real page. ]]> Search for closest matching valid URL and redirect Use attempted url text as a DB keyword lookup Funky caching