Answered Preventing 2.3 from requesting files from google, gravatar & co

    public function getUserImage()
    {
        /** @var modUserProfile $userProfile */
        $userProfile = $this->modx->user->getOne('Profile');

        if ($userProfile->photo) {
            // First, handle user defined image
            $src = $this->modx->getOption('connectors_url', MODX_CONNECTORS_URL)
                .'system/phpthumb.php?zc=1&h=128&w=128&src='
                .$userProfile->photo;
            $userImage = '<img src="' . $src . '" />';
        } else {
            // Fallback to Gravatar
            $gravemail = md5(
                strtolower(
                    trim($userProfile->email)
                )
            );
            $gravsrc = $this->modx->getOption('url_scheme', null, 'http://') . 'www.gravatar.com/avatar/'
            .$gravemail . '?s=128&d=mm';
            $userImage = '<img src="' . $gravsrc . '" />';
        }

        return $userImage;
    }