public function submitReport($username, $ip, $evidence, $email)
    {

        if (!$this->apiKey) {
            throw new \Exception("To submit a spam report you need an API Key");
        }

        $apiUrl = "http://www.stopforumspam.com/add.php"
            . "?username=" . urlencode($username)
            . "&ip_addr=" . urlencode($ip)
            . "&evidence=" . urlencode($evidence)
            . "&email=" . urlencode($email)
            . "&api_key=" . urlencode($this->apiKey);

        $response = $this->sendRequest($apiUrl);

        if (preg_match('/data submitted successfully/', $response)) {
            return true;
        } else {
            throw new \Exception("Submission failed.");
        }
    }