private function get_versions() {
            $versions = array();
            $versions['platform_version']             = get_bloginfo( 'version' );
            $versions['sdk_version']                  = $this->version;
            $versions['programming_language_version'] = phpversion();

            foreach ( $versions as $k => $version ) {
                if ( is_string( $versions[ $k ] ) && ! empty( $versions[ $k ] ) ) {
                    $versions[ $k ] = substr( $versions[ $k ], 0, 16 );
                }
            }

            return $versions;
        }