original_string: protected function fill($placeholder, $instance){
          switch( $placeholder ){
              case 'title':
                  return get_the_title();
                  break;
              case 'url':
                  return get_permalink();
                  break;
              case 'excerpt':
                  return  get_the_excerpt();
                  break;
              case 'date':
                  return  get_the_date();
                  break;
              case 'modified':
                  return get_the_modified_date();
                  break;
              case 'author':
                  return get_the_author();
                  break;
              default:
                  return false;
                  break;
          }
      }
code: protected function fill($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;
          }
      }
code_tokens: 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 ; } }
docstring: Get placeholder's content
  
  @param string $placeholder
  @param array $instance Widget's setting
  @return bool|string
docstring_tokens: Get placeholder s content