By Deepak Singh

2019-06-09 13:05:13 8 Comments

How can I get the bottom-most level terms for a custom taxonomy?

Taxonomy Hierarchy example,

Custom Taxonomy: "product-category"

Top Level Terms -> Second Level Terms -> Third Level Terms -> Bottom most Level Terms

I want to get only Bottom most level taxonomy terms. I want to get this on out of the loop on index.php page, so setting parent id is not possible in get_terms() function.


@Deepak Singh 2019-06-11 14:51:04

Here is the solution I ended up with. This may help others too.

$taxonomy = "product-category";

    $args = array(
        'taxonomy' => $taxonomy,
        'orderby' => 'name',
        'order' => 'ASC',
        'hierarchical'  => true,
        'hide_empty' => false,

    $the_query = new WP_Term_Query($args);
    $categories = $the_query->get_terms();

    if ($categories){

        foreach($categories as $category){
            $ancestors = get_ancestors( $category->term_id, $taxonomy );
            $category->ancestors = $ancestors; 
            $category->depth = count( $ancestors ) ;

            if($category->depth === 3) :    

                echo $category->term_id . '-' . $category->depth . '-' . $category->name;   



First, I used WP_Term_Query Class to create the terms object and build my custom query then get_terms() to retrieve all the terms.

Inside foreach loop used get_ancestors() function to return the array containing the parents of the given object and $category->depth to get the current depth.

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