własne kolumny w WordPress admin panel

Wstawienie kolumn w wykazie postów w panelu administratora bardzo ułatwia nawigację po wpisach, aby dodać kolumny zawierające wybrane custom fields wstawiamy kod w function.php:

add_filter('manage_testimonials_posts_columns' , 'add_testimonials_columns');
function add_testimonials_columns($columns) {
    unset($columns['author']);
    return array_merge($columns,
          array('testimonial-when' => 'date of opinion',
                'testimonial-who' => 'author of opinion'
              ));
}

add_action('manage_testimonials_posts_custom_column' , 'testimonials_custom_columns', 10, 2 );
function testimonials_custom_columns( $column, $post_id ) {
    switch ( $column ) {

    case 'testimonial-when' :
    $opinion_date = get_post_meta($post_id, 'testimonial-when', true);
    $opinion_date = new DateTime($opinion_date);
    echo $opinion_date->format('d-m-Y');
        break;

    case 'testimonial-who' :
        $opinion_author = get_post_meta($post_id, 'testimonial-who', true);
        echo $opinion_author;
        break;
    }
}

więcej info:

• https://code.tutsplus.com/articles/add-a-custom-column-in-posts-and-custom-post-types-admin-screen–wp-24934
• https://upstatement.com/blog/2014/02/adding-columns-to-the-wordpress-admin-the-easy-way/
• http://scribu.net/wordpress/sortable-taxonomy-columns.html