Taxonomies in WordPress allow you to organize content in a meaningful way. While WordPress comes with built-in taxonomies like Categories and Tags, you may sometimes need more specific classification. This is where custom taxonomies come in.

A custom taxonomy in WordPress enables you to group content beyond the default options, such as creating product types for an eCommerce store, categorizing services, or tagging events by location. Custom taxonomies enhance your website’s structure, improve navigation, and help both visitors and search engines better understand your content.

In this comprehensive guide, we will cover:
✅ What custom taxonomies are
✅ Different types of custom taxonomies
✅ How to create custom taxonomies in WordPress
✅ Best practices for custom taxonomies
✅ Frequently asked questions (FAQs)

Let’s explore how custom taxonomies can take your WordPress site to the next level! 🚀

What Are Custom Taxonomies in WordPress?

A taxonomy is a way of grouping content based on similar characteristics. In WordPress, taxonomies are used to organize content into logical groups, making it easier for users to find related posts, products, or services.

While WordPress comes with two default taxonomies—Categories and Tags—you can also create your own custom taxonomies to organize your content even further.

For example, if you run a movie review website, you could create a custom taxonomy for Genres (Action, Comedy, Drama) to group movies based on their genre.

Why Should You Create Custom Taxonomies in WordPress?

✅ Better Content Organization

Custom taxonomies allow you to group content in meaningful ways that make sense for your site, improving your content management system.

✅ Improved User Experience

With custom taxonomies, visitors can filter and find content faster, enhancing their overall site experience.

✅ Enhanced SEO

Organizing your content into custom taxonomies helps search engines index and rank your site more effectively.

✅ Increased Customization

Custom taxonomies can be paired with custom post types for even more flexibility in organizing content.

Types of Custom Taxonomies in WordPress

1. Hierarchical Custom Taxonomy

A hierarchical taxonomy is similar to categories, where you can create parent and child relationships. It’s perfect for content that has a natural hierarchy, like:

  • Product Categories (Parent: Electronics, Child: Mobile Phones, Tablet)
  • Genres (Parent: Fiction, Child: Mystery, Thriller)

2. Non-Hierarchical Custom Taxonomy

A non-hierarchical taxonomy works like tags, where terms are not related in a parent-child structure. They are flat and used for more general grouping, such as:

  • Movie Ratings (Action, Adventure, Sci-Fi)
  • Ingredients (Tomato, Onion, Garlic)

How to Create Custom Taxonomies in WordPress

There are two main ways to create custom taxonomies in WordPress: manually using code or by using a plugin. Let’s go through both methods.

Method 1: Creating Custom Taxonomies Using Code

To create a custom taxonomy manually, you will need to add some code to your theme’s functions.php file. Here’s how to do it:

Step 1: Open the functions.php File

  • Go to Appearance → Theme Editor and open functions.php.
  • Alternatively, you can add the code in a custom plugin.

Step 2: Add the Code to Register the Taxonomy

Here’s an example of how to register a custom taxonomy for a book genre:

function create_book_genre_taxonomy() {
    $args = array(
        'labels' => array(
            'name' => 'Book Genres',
            'singular_name' => 'Book Genre',
            'search_items' => 'Search Genres',
            'all_items' => 'All Genres',
            'parent_item' => 'Parent Genre',
            'parent_item_colon' => 'Parent Genre:',
            'edit_item' => 'Edit Genre',
            'update_item' => 'Update Genre',
            'add_new_item' => 'Add New Genre',
            'new_item_name' => 'New Genre Name',
            'menu_name' => 'Genres',
        ),
        'hierarchical' => true, // Set to false for non-hierarchical taxonomies
        'public' => true,
        'show_ui' => true,
        'show_admin_column' => true,
        'query_var' => true,
        'rewrite' => array('slug' => 'genre'),
    );

    register_taxonomy('book_genre', 'post', $args);
}
add_action('init', 'create_book_genre_taxonomy');

Step 3: Save and Test

After adding the code, visit your WordPress admin panel. You should now see the custom taxonomy (e.g., Genres) under the Posts menu.

Method 2: Creating Custom Taxonomies Using a Plugin

If you don’t want to work with code, you can use a plugin like Custom Post Type UI (CPT UI) to create custom taxonomies quickly.

Step 1: Install and Activate CPT UI Plugin

  • Go to Plugins → Add New and search for “Custom Post Type UI.”
  • Install and activate the plugin.

Step 2: Create a New Taxonomy

  1. Go to CPT UI → Add/Edit Taxonomies.
  2. Enter the Taxonomy Slug (e.g., genre).
  3. Set the Plural Label (e.g., Genres) and Singular Label (e.g., Genre).
  4. Choose the Post Types that the taxonomy will apply to (e.g., Post, Page, or any custom post type).
  5. Configure the settings as needed (public visibility, rewrite options, etc.), and click Add Taxonomy.

Your custom taxonomy is now created and ready to use! 🎉

Best Practices for Custom Taxonomies in WordPress

✅ Use Descriptive and SEO-Friendly Slugs

The slug of your custom taxonomy should be short, descriptive, and SEO-friendly (e.g., book-genre instead of bgenre).

✅ Utilize Taxonomy Hierarchy Wisely

Use hierarchical taxonomies for content with clear parent-child relationships.

✅ Keep It Simple

Avoid creating too many custom taxonomies. Keep it manageable and relevant to the content you’re organizing.

✅ Link Custom Taxonomies to Custom Post Types

Custom taxonomies are most useful when paired with custom post types for more specific content organization.

✅ Ensure User-Friendly Interface

Make it easy for users to select and filter by taxonomies in the backend. This can be done by enabling the “Show Admin Column” feature.

Frequently Asked Questions (FAQs)

1. How do I display custom taxonomy terms on my website?

You can display custom taxonomy terms on your website using the get_terms() function or by querying the taxonomy terms directly in your theme templates. Example:

$terms = get_terms(array(
    'taxonomy' => 'book_genre',
    'hide_empty' => false,
));

foreach ($terms as $term) {
    echo '<li>' . $term->name . '</li>';
}

2. Can I create multiple custom taxonomies for the same custom post type?

Yes, you can register multiple custom taxonomies for the same custom post type. Simply call register_taxonomy() multiple times with different taxonomy slugs.

3. How do I associate custom taxonomies with custom post types?

When registering a custom taxonomy, use the 'object_type' argument to associate it with one or more custom post types. Example:

register_taxonomy('book_genre', array('book', 'movie'), $args);

4. Can I use custom taxonomies for media (images, videos)?

Yes! You can register custom taxonomies for media files like images and videos by associating the taxonomy with the attachment post type.

5. How do I display custom taxonomy terms on a single post page?

To display custom taxonomy terms on a single post page, use the get_the_terms() function within your single post template:

$terms = get_the_terms($post->ID, 'book_genre');
if ($terms) {
    foreach ($terms as $term) {
        echo '<span>' . $term->name . '</span>';
    }
}

Conclusion

Creating and using custom taxonomies in WordPress is a powerful way to organize and structure content. Whether you’re organizing blog posts, products, services, or even media, custom taxonomies enhance navigation, improve SEO, and give your site greater flexibility.

By following the steps in this guide, you can easily create custom taxonomies that meet your specific needs, making your WordPress website more organized and user-friendly.

Start creating custom taxonomies today and take control of how your content is structured! 🚀

This page was last edited on 13 March 2025, at 3:54 pm