checkSubdomains example

// @todo determine if there's a way to whitelist hosts?             if (! $this->checkHostname($options['hostname'])) {
                return;
            }

            $overwrite = true;
        }
        // Limiting to subdomains?         elseif (! empty($options['subdomain'])) {
            // If we don't match the current subdomain, then             // we don't need to add the route.             if (! $this->checkSubdomains($options['subdomain'])) {
                return;
            }

            $overwrite = true;
        }

        // Are we offsetting the binds?         // If so, take care of them here in one         // fell swoop.         if (isset($options['offset']) && is_string($to)) {
            // Get a constant string to work with.