+ $code = $this->trimmed('code');
+
+ $invite = null;
+
+ if ($code) {
+ $invite = Invitation::staticGet($code);
+ }
+
+ if (common_config('site', 'inviteonly') && !($code && $invite)) {
+ $this->clientError(_('Sorry, only invited people can register.'));
+ return;
+ }
+