获取WooCommerce中顶级产品类别的自定义数组

Question

Is there any way to get list of top level products categories in woocomerce to display them in custom section within my theme

Here is the code I use, but it returns all categories:

function getCategoriesList() {

    // prior to wordpress 4.5.0
    $args = array(
        'number'     => $number,
        'orderby'    => $orderby,
        'order'      => $order,
        'hide_empty' => $hide_empty,
        'include'    => $ids
    );

    $product_categories = get_terms( 'product_cat', $args );

    // since wordpress 4.5.0
    $args = array(
        'taxonomy'   => "product_cat",
        'child_of'   => 0,
        'number'     => $number,
        'orderby'    => $orderby,
        'order'      => $order,
        'hide_empty' => $hide_empty,
        'include'    => $ids
    );
    $product_categories = get_terms($args);

    $list = array();
    foreach( $product_categories as $cat ){ 
        $thumbnail_id = get_woocommerce_term_meta( $cat->term_id, 'thumbnail_id', true );
        $image = wp_get_attachment_url( $thumbnail_id );
        $link = get_term_link( $cat->term_id, 'product_cat' );
        $list[] = array($cat->term_id, $cat->name, $image, $link);        
    }

    return $list;

}

I have added recently:

'child_of'   => 0 

But there is no change.

How to make it work for only top level product categories?

Answer 1

To get it works, the missing argument is just 'parent' => 0 (but not 'child_of' )

So your working code should be something like this (and will return your array correctly:

function getProductCategoriesList() {

    // since wordpress 4.5.0
    $product_categories = get_terms( $args = array(
        'taxonomy'   => "product_cat",
        'hide_empty' => false,
        'parent'     => 0,
    ) );

    $list = array();

    foreach( $product_categories as $cat ){ 
        $thumbnail_id = get_woocommerce_term_meta( $cat->term_id, 'thumbnail_id', true );
        $image = wp_get_attachment_url( $thumbnail_id );
        $link = get_term_link( $cat->term_id, 'product_cat' );
        $list[] = array($cat->term_id, $cat->name, $image, $link);        
    }

    return $list;
}

Code goes in function.php file of your active child theme (or theme) or also in any plugin file.

Tested and works