protected function fill($placeholder, $instance){
        switch( $placeholder ){
            case 'title':
                return get_the_title();
                break;
            case 'url':
                return get_permalink();
                break;
            case 'excerpt':
                return  get_the_excerpt();
                break;
            case 'date':
                return  get_the_date();
                break;
            case 'modified':
                return get_the_modified_date();
                break;
            case 'author':
                return get_the_author();
                break;
            default:
                return false;
                break;
        }
    }
protected function fill($placeholder, $instance){
        switch( $placeholder ){
            case 'title':
                return get_the_title();
                break;
            case 'url':
                return get_permalink();
                break;
            case 'excerpt':
                return  get_the_excerpt();
                break;
            case 'date':
                return  get_the_date();
                break;
            case 'modified':
                return get_the_modified_date();
                break;
            case 'author':
                return get_the_author();
                break;
            default:
                return false;
                break;
        }
    }
protected function fill ( $ placeholder , $ instance ) { switch ( $ placeholder ) { case 'title' : return get_the_title ( ) ; break ; case 'url' : return get_permalink ( ) ; break ; case 'excerpt' : return get_the_excerpt ( ) ; break ; case 'date' : return get_the_date ( ) ; break ; case 'modified' : return get_the_modified_date ( ) ; break ; case 'author' : return get_the_author ( ) ; break ; default : return false ; break ; } }
Get placeholder's content

@param string $placeholder
@param array $instance Widget's setting
@return bool|string
Get placeholder s content