palette ) ) { $palette = implode( '|', $this->palette ); } else { // Default to true. $palette = ( false === $this->palette || 'false' === $this->palette ) ? 'false' : 'true'; } // Support passing show_opacity as string or boolean. Default to true. $show_opacity = ( false === $this->show_opacity || 'false' === $this->show_opacity ) ? 'false' : 'true'; ?>