Why does my taxonomy code display the first alphabetical term?

Question

What i am trying to do is echo the last hierarchial child term for the taxonomy. My taxonomy is propertytype.

My hierarchial structure is:

• Real Estate (Parent)
• Commercial (Child)
• Offices (Child of Commercial)
• Basement (Child of Commercial)

So in the above case i would only like to echo Offices, or which ever the last hierarchial child term is.

I thought my code below would do this, but it actually echoes Commercial because Commercial is alphabetically before Offices. Now Basement will be ok because it is alphabetically before Commercial.

How do I always echo the last hierarchial child term only?

My code is:

$terms = get_the_terms($wp_query->post->ID, 'propertytype');                    
//die(print_r($terms));
$props = array();
foreach ($terms as $term) { 
    $hasChildrenTest = get_term_children($term->ID, 'propertytype' );
    if ($term->parent) {
        if (empty($hasChildrenTest) && !is_wp_error($hasChildrenTest)) {
            $props[] = $term->slug;
        }
    }
}
echo $props[0];

Answer 1

With wp_get_object_terms() you're able to manipulate the sorting.

Make sure you tweak the sorting to what you want.

Try something more or less like this (Updated: 5/17/2012 -- 8:15AM):

$taxonomyName = 'producttype';
$terms = wp_get_object_terms($wp_query->post->ID, $taxonomyName, array('orderby' => 'name', 'order' => 'ASC', 'fields' => 'all'));
if(!empty($terms)){
    if(!is_wp_error($terms)){
        for($i = 0; $i < count($terms); $i++){
            if($terms[$i]->parent != 0){
                $termChildren[] = $terms[$i];
            }
        }
    }
}
print_r($termChildren);

Output a list of all public custom taxonomies

<?php 
$args=array(
  'public'   => true,
  '_builtin' => false

); 
$output = 'names'; // or objects
$operator = 'and'; // 'and' or 'or'
$taxonomies=get_taxonomies($args,$output,$operator); 
if  ($taxonomies) {
  foreach ($taxonomies  as $taxonomy ) {
    echo '<p>'. $taxonomy. '</p>';
  }
}
?>

Output a list of all public custom post types

<?php 
$args=array(
  'public'   => true,
  '_builtin' => false
); 
$output = 'names'; // names or objects, note names is the default
$operator = 'and'; // 'and' or 'or'
$post_types=get_post_types($args,$output,$operator); 
  foreach ($post_types  as $post_type ) {
    echo '<p>'. $post_type. '</p>';
  }
?>