Protect wordpress against malicious URL requests

Fantastic snippet from Perishable Press this snippet is great for the security to protect wordpress against malicious URL requests. I have attached a zip file with a download of this snippet as a plugin. Just ftp the single php file to your plugins folder and active as normal.

global $user_ID; if($user_ID) {
        if(!current_user_can('administrator')) {
                if (strlen($_SERVER['REQUEST_URI']) > 255 ||
                        stripos($_SERVER['REQUEST_URI'], "eval(") ||
                        stripos($_SERVER['REQUEST_URI'], "CONCAT") ||
                        stripos($_SERVER['REQUEST_URI'], "UNION+SELECT") ||
                        stripos($_SERVER['REQUEST_URI'], "base64")) {
                                @header("HTTP/1.1 414 Request-URI Too Long");
                                @header("Status: 414 Request-URI Too Long");
                                @header("Connection: Close");
                                @exit;
                }
        }
}