Define Labels

Labels for a post type are defined in the labels() method and must return an array of labels.

By default, an empty array is returned and the WordPress default labels are used.

See get_post_type_labels() for a full list of supported labels.

use PostTypes\PostType;

class Books extends PostType
{
    //...

    /**
     * Returns the Books post type labels.
     *
     * @return array
     */
    public function labels(): array
    {
        return [
            'name'               => __( 'Books', 'my-text-domain' ),
            'singular_name'      => __( 'Book', 'my-text-domain' ),
            'menu_name'          => __( 'Books', 'my-text-domain' ),
            'all_items'          => __( 'Books', 'my-text-domain' ),
            'add_new'            => __( 'Add New', 'my-text-domain' ),
            'add_new_item'       => __( 'Add New Book', 'my-text-domain' ),
            'edit_item'          => __( 'Edit Book', 'my-text-domain' ),
            'new_item'           => __( 'New Book', 'my-text-domain' ),
            'view_item'          => __( 'View Book', 'my-text-domain' ),
            'search_items'       => __( 'Search Books', 'my-text-domain' ),
            'not_found'          => __( 'No Books found', 'my-text-domain' ),
            'not_found_in_trash' => __( 'No Books found in Trash', 'my-text-domain' ),
        ];
    }
}