Wordpress - Get the taxonomy of a post hierarchically

Question

I would like to get all the taxonomy of one post (in a loop), hierarchically. Example I have those taxonomies, and the ID of the tax in bracket.

Tax1(1)
-Tax2(3)
--Tax3(2)

I would like to gather them, in an array maybe, in this order. Right now I manage to get an array of those 3, but the order is wrong. I can't order it by id, since the ID are not ordered at first. I can't also order it by name and slug. (Names of my current taxonomies are not Tax1, Tax2...)

The code I have at the moment is

$args = array('orderby' => 'term_order', 'order' => 'ASC', 'fields' => 'all');
$productcategories = wp_get_object_terms($post->ID, 'guide_type', $args);

Answer 1

Use "Wordpress" Walker class to create a hierarchy of the taxonomy

<?php
class Walker_Quickstart extends Walker {

    // Tell Walker where to inherit it's parent and id values
    var $db_fields = array(
        'parent' => 'parent', 
        'id'     => 'term_id' 
    );

    /**
     * At the start of each element, output a <p> tag structure.
     */
    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
        $output .= sprintf( "\n<p>%s %s (%s)</p>\n",
            str_repeat('&dash;', $depth),
            $item->name,
            $item->term_id            
        );
    }

}?>

This class will create a hierarchy of elements. Use this class with your returned elements like this :

$args = array('orderby' => 'term_order', 'order' => 'ASC', 'fields' => 'all');
$productcategories = wp_get_object_terms($post->ID, 'guide_type', $args);
$walk = new Walker_Quickstart();
echo $walk->walk($productcategories, 0);