Unhandled Error!

 
            if (!$url) {
                throw new Exception("Could not determine Certificate location");
            }
 
            //Get mime type from file
            $mime = $this->curl_getheaders($url)["Content-Type"];
            //fix incorrectly identified pdf's
            if ($mime=="image/pdf") {
                $mime="application/pdf";
            }
 
            // Get file extension