custom_permalink

developer_word

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·

Jan 19, 2026

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//functions.php

function register_cluster_taxonomy() {
 
    $labels = array(
        'name'                       => _x( 'Clusters', 'taxonomy general name', 'textdomain' ),
        'singular_name'              => _x( 'Cluster', 'taxonomy singular name', 'textdomain' ),
        'search_items'               => __( 'Search Clusters', 'textdomain' ),
        'popular_items'              => __( 'Popular Clusters', 'textdomain' ),
        'all_items'                  => __( 'All Clusters', 'textdomain' ),
        'edit_item'                  => __( 'Edit Cluster', 'textdomain' ),
        'update_item'                => __( 'Update Cluster', 'textdomain' ),
        'add_new_item'               => __( 'Add New Cluster', 'textdomain' ),
        'new_item_name'              => __( 'New Cluster Name', 'textdomain' ),
        'separate_items_with_commas' => __( 'Separate clusters with commas', 'textdomain' ),
        'add_or_remove_items'        => __( 'Add or remove clusters', 'textdomain' ),
        'choose_from_most_used'      => __( 'Choose from the most used clusters', 'textdomain' ),
        'menu_name'                  => __( 'Clusters', 'textdomain' ),
    );
 
    $args = array(
        'hierarchical'          => true,
        'labels'                => $labels,
        'show_ui'               => true,
        'show_admin_column'     => true,
        'update_count_callback' => '_update_post_term_count',
        'query_var'             => true,
        'rewrite'               => array( 'slug' => 'cluster' ),
        'show_in_rest'          => true,
    );
 
    register_taxonomy( 'cluster', 'post', $args );
}
add_action( 'init', 'register_cluster_taxonomy' );
 
function multi_level_category_permalink($permalink, $post) {
    if ($post->post_type == 'post') {
 
        $categories = get_the_terms($post->ID, 'category');
 
        $cluster = get_the_terms($post->ID, 'cluster');
 
 
        if ($categories && !is_wp_error($categories)) {
 
            $child = null;
            foreach ($categories as $cat) {
                if ($cat->parent != 0) {
                    $child = $cat;
                }
            }
 
            if ($child) {
                $parent = get_term($child->parent, 'category');
                $cat_path = $parent->slug . '/' . $child->slug;
            } else {
                $cat_path = $categories[0]->slug;
            }
 
            if($cluster){
                $cat_path = $cat_path . '/' . $cluster[0]->slug;
            }
 
            $permalink = str_replace('%categoryabc%', $cat_path, $permalink);
 
        }
    }
    return $permalink;
}
add_filter('post_link', 'multi_level_category_permalink', 10, 2);
 
function add_category_hierarchy_rewrite_rules() {
    add_rewrite_tag('%categoryabc%', '([^/]+(?:/[^/]+)*)');
    add_permastruct('post', '%categoryabc%/%postname%/', false);
}
add_action('init', 'add_category_hierarchy_rewrite_rules');

/%categoryabc%/%postname%/