Check if your WooCommerce custom product attributes are taxonomies. This will show custom product attributes on your product page above the Add to Cart button. THIS WILL ALSO SHOW A NOTICE ON THE PRODUCT PAGE RIGHT UNDER THE ATTRIBUTES. THE NOTICE WILL EITHER SAY: "These ARE taxonomies." or "NOT a taxonomy."

isa-check-if-woocommerce-pa-is-tax

/**
* Check if your WooCommerce custom product attributes are taxonomies.
*
* This will show custom product attributes on your product page
* above the Add to Cart button.
* 
* THIS WILL ALSO SHOW A NOTICE ON THE PRODUCT PAGE
* RIGHT UNDER THE ATTRIBUTES.
*
* THE NOTICE WILL EITHER SAY:
*
* "These ARE taxonomies."
*
* or
*
* "NOT a taxonomy."
*
*/

function isa_check_if_woocommerce_pa_is_taxonomy(){
  
    global $product;
    $attributes = $product->get_attributes();
  
    if ( ! $attributes ) {
        return;
    }
  
    $out = '';
  
    foreach ( $attributes as $attribute ) {

            // skip variations
            if ( $attribute['is_variation'] ) {
                continue;
            }
           
        if ( $attribute['is_taxonomy'] ) {

            $terms = wp_get_post_terms( $product->id, $attribute['name'], 'all' );
			
			// get the taxonomy
			$tax = $terms[0]->taxonomy;
			
			// get the tax object
			$tax_object = get_taxonomy($tax);
			
			// get tax label
			if ( isset ($tax_object->labels->name) ) {
				$tax_label = $tax_object->labels->name;
			} elseif ( isset( $tax_object->label ) ) {
				$tax_label = $tax_object->label;
			}
			
            foreach ( $terms as $term ) {
 
                $out .= $tax_label . ': ';
                $out .= $term->name . '<br />';
                 
            }
			
			/*
			***************************************
			
			Begin @test
			
			***************************************
			*/
              
			  
			$out .= '<div style="margin: 8px;padding:8px; color: #4F8A10;background-color: #DFF2BF">These ARE taxonomies.</div>';
			
			
			/*
			***************************************
			
			end @test
			
			***************************************
			*/
              
        } else {
            $out .= $attribute['name'] . ': ';
            $out .= $attribute['value'] . '<br />';
			
			/*
			***************************************
			
			Begin @test
			
			***************************************
			*/
              
			  
			$out .= '<div style="margin: 8px;padding:8px; color: #D8000C;background-color: #FFBABA">NOT a taxonomy.</div>';
			
			
			/*
			***************************************
			
			end @test
			
			***************************************
			*/
              
        }
    }
    echo $out;
}
   
add_action('woocommerce_single_product_summary', 'isa_check_if_woocommerce_pa_is_taxonomy', 25);