Custom Taxonomy Endpoint Pagination Using Paginate_links()
Introduction
In WordPress, custom taxonomies can be a powerful tool for organizing and categorizing content. However, when it comes to pagination, things can get a bit tricky. In this article, we'll explore how to implement pagination for custom taxonomy endpoints using the paginate_links() function.
The Setup
Before we dive into the code, let's take a look at the setup we'll be working with. We have two taxonomies and one post type:
- Post Type:
products - Hierarchical Taxonomy:
product_cat - Nonhierarchical Taxonomy:
product_type
The product_cat taxonomy has a defined endpoint, which we'll use to demonstrate pagination.
Adding the Endpoint
To add the endpoint, we'll use the add_endpoint() function. This function allows us to register a new endpoint for our taxonomy. Here's an example of how we might add the endpoint:
function add_product_cat_endpoint() {
add_rewrite_endpoint('product-cat', EP_ROOT );
}
add_action( 'init', 'add_product_cat_endpoint' );
This code adds a new endpoint called product-cat to the root of our site.
Creating the Endpoint
Now that we have the endpoint registered, let's create the endpoint itself. We'll use the get_query_var() function to retrieve the query variable for our endpoint. Here's an example of how we might create the endpoint:
function product_cat_endpoint() {
$query_var = get_query_var( 'product-cat' );
if ( empty( $query_var ) ) {
return;
}
$args = array(
'post_type' => 'products',
'tax_query' => array(
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => $query_var,
),
),
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
while ( $query->have_posts() ) {
$query->the_post();
the_title();
the_content();
}
wp_reset_postdata();
}
}
add_action( 'template_redirect', 'product_cat_endpoint' );
This code retrieves the query variable for our endpoint and uses it to query the database for posts that match the specified taxonomy term. It then displays the title and content of each post.
Implementing Pagination
Now that we have the endpoint created, let's implement pagination using the paginate_links() function. This function generates a pagination link for our query. Here's an example of how we might implement pagination:
function product_cat_pagination() {
global $wp_query;
$args = array(
'base' => '%_%',
'format' => '?product-cat=%#%',
'total' => $wp_query->max_num_pages,
'current' => max( 1, get_query_var( 'paged' ) ),
'mid_size' => 2,
'prev_text' => __( 'Previous' ),
'next_text' => __( 'Next' ),
);
echo paginate_links( $args );
}
This generates a pagination link for our query. It uses the get_query_var() function to retrieve the current page number and the max_num_pages property of the $wp_query object to determine the total number of pages.
Displaying the Pagination
Finally, let's display the pagination link on our endpoint. We'll use the product_cat_pagination() function to generate the link and display it on our endpoint. Here's an example of how we might display the pagination:
function product_cat_endpoint() {
// ... (rest of the code remains the same)
$args = array(
'post_type' => 'products',
'tax_query' => array(
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => $query_var,
),
),
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
while ( $query->have_posts() ) {
$query->the_post();
the_title();
the_content();
}
wp_reset_postdata();
}
product_cat_pagination();
}
This code displays the pagination link on our endpoint. It uses the product_cat_pagination() function to generate the link and display it on our endpoint.
Conclusion
In this article, we've explored how to implement pagination for custom taxonomy endpoints using the paginate_links() function. We've created a custom endpoint for our product_cat taxonomy and implemented pagination using the paginate_links() function. We've also displayed the pagination link on our endpoint using the product_cat_pagination() function. With this code, you can easily implement pagination for your custom taxonomy endpoints and provide a better user experience for your visitors.
Rewrite Rules
To enable the pagination link, we need to add a rewrite rule for our endpoint. We can do this by adding the following code to our theme's functions.php file:
function add_product_cat_rewrite_rule() {
add_rewrite_rule( 'product-cat/([^/]+)/?{{content}}#39;, 'index.php?product-cat=$matches[1]', 'top' );
}
add_action( 'init', 'add_product_cat_rewrite_rule' );
This code adds a rewrite rule for our endpoint. It uses the add_rewrite_rule() function to add a new rewrite rule for our endpoint.
Rewrite Rules for Nonhierarchical Taxonomy
To enable pagination for our nonhierarchical taxonomy, we need to add a rewrite rule for our endpoint. We can do this by adding the following code to our theme's functions.php file:
function add_product_type_rewrite_rule() {
add_rewrite_rule( 'product-type/([^/]+)/?{{content}}#39;, 'index.php?product-type=$matches[1]', 'top' );
}
add_action( 'init', 'add_product_type_rewrite_rule' );
This code adds a rewrite rule for our endpoint. It uses the add_rewrite_rule() function to add a new rewrite rule for our endpoint.
Rewrite Rules for Hierarchical Taxonomy
To enable pagination for our hierarchical taxonomy, we need to add a rewrite rule for our endpoint. We can do this by adding the following code to our theme's functions.php file```php
function add_product_cat_rewrite_rule() {
add_rewrite_rule( 'product-cat/([/]+)/([/]+)/?matches[1]&product-cat-sub=$matches[2]', 'top' );
}
add_action( 'init', 'add_product_cat_rewrite_rule' );
This code adds a rewrite rule for our endpoint. It uses the `add_rewrite_rule()` function to add a new rewrite rule for our endpoint.
Conclusion
Introduction
In our previous article, we explored how to implement pagination for custom taxonomy endpoints using the paginate_links() function. We created a custom endpoint for our product_cat taxonomy and implemented pagination using the paginate_links() function. We also displayed the pagination link on our endpoint using the product_cat_pagination() function. In this article, we'll answer some frequently asked questions about custom taxonomy endpoint pagination.
Q: What is the difference between a hierarchical and nonhierarchical taxonomy?
A: A hierarchical taxonomy is a taxonomy that has a parent-child relationship between its terms. For example, in the product_cat taxonomy, a term like "Electronics" might have child terms like "Smartphones" and "Laptops". A nonhierarchical taxonomy, on the other hand, is a taxonomy that does not have a parent-child relationship between its terms. For example, in the product_type taxonomy, a term like "Smartphone" might not have any child terms.
Q: How do I add a rewrite rule for my custom taxonomy endpoint?
A: To add a rewrite rule for your custom taxonomy endpoint, you can use the add_rewrite_rule() function. This function allows you to add a new rewrite rule for your endpoint. For example, to add a rewrite rule for the product-cat endpoint, you can use the following code:
function add_product_cat_rewrite_rule() {
add_rewrite_rule( 'product-cat/([^/]+)/?{{content}}amp;#39;, 'index.php?product-cat=$matches[1]', 'top' );
}
add_action( 'init', 'add_product_cat_rewrite_rule' );
</code></pre>
<h2><strong>Q: How do I display the pagination link on my custom taxonomy endpoint?</strong></h2>
<p>A: To display the pagination link on your custom taxonomy endpoint, you can use the <code>product_cat_pagination()</code> function. This function generates a pagination link for your query. For example, to display the pagination link on the <code>product-cat</code> endpoint, you can use the following code:</p>
<pre><code class="hljs">function product_cat_endpoint() {
// ... (rest of the code remains the same)
$args = array(
'post_type' => 'products',
'tax_query' => array(
array(
'taxonomy' => 'product_cat',
'field' => 'slug',
'terms' => $query_var,
),
),
);
$query = new WP_Query( $args );
if ( $query->have_posts() ) {
while ( $query->have_posts() ) {
$query->the_post();
the_title();
the_content();
}
wp_reset_postdata();
}
product_cat_pagination();
}
</code></pre>
<h2><strong>Q: How do I implement pagination for my nonhierarchical taxonomy?</strong></h2>
<p>A: To implement pagination for your nonhierarchical taxonomy, you can use the same code as for the hierarchical taxonomy. However, you will need to add a rewrite rule for your endpoint using the <code>add_rewrite_rule()</code> function. For example, to add a rewrite rule for the <code>product-type</code> endpoint, you can use the following code:</p>
<pre><code class="hljs">function add_product_type_rewrite_rule() {
add_rewrite_rule( 'product-type/([^/]+)/?{{content}}amp;#39;, 'index.php?product-type=$matches[1]', 'top' );
}
add_action( 'init', 'add_product_type_rewrite_rule' );
</code></pre>
<h2><strong>Q: How do I implement pagination for my hierarchical taxonomy?</strong></h2>
<p>A: To implement pagination for your hierarchical taxonomy, you can use the same code as for the nonhierarchical taxonomy. However, you will need to add a rewrite rule for your endpoint using the <code>add_rewrite_rule()</code> function. For example, to add a rewrite rule for the <code>product-cat</code> endpoint, you can use the following code:</p>
<pre><code class="hljs">function add_product_cat_rewrite_rule() {
add_rewrite_rule( 'product-cat/([^/]+)/([^/]+)/?{{content}}amp;#39;, 'index.php?product-cat=$matches[1]&product-cat-sub=$matches[2]', 'top' );
}
add_action( 'init', 'add_product_cat_rewrite_rule' );
</code></pre>
<h2><strong>Conclusion</strong></h2>
<p>In this article, we've answered some frequently asked questions about custom taxonomy endpoint pagination. We've covered topics such as hierarchical and nonhierarchical taxonomies, adding rewrite rules, and displaying pagination links. With this knowledge, you should be able to implement pagination for your custom taxonomy endpoints and provide a better user experience for your visitors.</p>
<h2><strong>Additional Resources</strong></h2>
<ul>
<li><a href="https://codex.wordpress.org/Function_Reference/add_rewrite_rule">WordPress Codex: add_rewrite_rule()</a></li>
<li><a href="https://codex.wordpress.org/Function_Reference/paginate_links">WordPress Codex: paginate_links()</a></li>
<li><a href="https://codex.wordpress.org/Class_Reference/WP_Query">WordPress Codex: WP_Query</a></li>
</ul>