Showing custom taxonomy column in custom posts type listings

Question

I have created a custom post type named banners. Thereby I register a new taxonomy called location that specifies on which page the banner is t

Answer 1

In addition to Jonathan Wold answer, you can add the ability to filter by your custom taxonomy like this:

add_action('restrict_manage_posts', 'filter_post_type_backend_by_taxonomies', 99, 2);

function filter_post_type_backend_by_taxonomies($post_type, $which) {
    if( 'your_post_type' !== $post_type) {
        return;
    }
    
    $taxonomies = array( 'your_custom_taxonomy' );
    
    foreach( $taxonomies as $taxonomy_slug ) {
        $taxonomy_obj = get_taxonomy( $taxonomy_slug );
        $taxonomy_name = $taxonomy_obj->labels->name;
        
        $terms = get_terms($taxonomy_slug);
        
        echo "";
        echo '' . sprintf( esc_html__( 'Show all %s', 'domain-name' ), $taxonomy_name) . '';
        foreach ( $terms as $term ) {
            printf(
                    '%3$s (%4$s)',
                    $term->slug,
                    ( ( isset( $_GET[$taxonomy_slug] ) && ( $_GET[$taxonomy_slug] == $term->slug ) ) ? ' selected="selected"' : '' ),
                    $term->name,
                    $term->count
            );
            }
        echo '';
    }
}