wordpress后台文章列表添加自定义列

//添加商品有效日期
function add_xiaoxian_column($columns) {   
    $columns[‘xiaoxian‘] = ‘有效期至‘;   
    return $columns;   
}   
add_filter(‘manage_posts_columns‘ , ‘add_xiaoxian_column‘);
//为商品有效日期填充数据
function xiaoxian_column_content($column_name, $post_id) {   
    if ($column_name == ‘xiaoxian‘) {   
        $xiaoxian_value = get_post_meta($post_id,‘xiaoxian‘,true);
        echo $xiaoxian_value;
    }   
}   
add_action(‘manage_posts_custom_column‘, ‘xiaoxian_column_content‘, 10, 2);