[WordPress] WordPress 自定义文章列表列的实现方法

function add_rating_column($columns) {   
    $columns['rating'] = '推荐指数';   
    return $columns;   
  }   
  add_filter('manage_posts_columns' , 'add_rating_column');

function rating_column_content($column_name, $post_id) {   
    if ($column_name == 'rating') {   
      $rating_value = get_post_meta( $post_id, '_rating', true );   
      echo ($rating_value / 2) . '星';   
    }   
  }   
  add_action('manage_posts_custom_column', 'rating_column_content', 10, 2);

function rating_column_table_sorting( $columns ) {   
    $columns['rating'] = 'rating';   
    return $columns;   
  }   
  add_filter( 'manage_edit-post_sortable_columns', 'rating_column_table_sorting' );

function rating_column_orderby( $vars ) {   
    if ( isset( $vars['orderby'] ) && $vars['orderby'] == 'rating' ) {   
      $vars['orderby'] = 'meta_value_num';   
      $vars['meta_key'] = '_rating';   
    }   
    return $vars;   
  }   
  add_filter( 'request', 'rating_column_orderby' );

function add_rating_column($columns) {   
    $new = array();   
    foreach($columns as $key => $title) {   
      if ($key == 'comments') {   
        $new['rating'] = '推荐指数';   
      }   
      // if ($key == 'comments') {   
      //  continue;   
      // }   
      $new[$key] = $title;   
    }   
    return $new;   
  }