Display Drupal taxonomy tree

Question

I sucessfully printed the whole taxonomy tree using this code.

$voc = taxonomy_vocabulary_machine_name_load('product_sub_categories');
$tree = taxonomy_get_tree($voc->vid, 0, NULL, TRUE);
foreach ($tree as $key => $term) {
  print $term->name."</br>";
}

Now I want to separately print parent and child in order to custom theme them, because I already have a mark-up in which parent has separate <p class="parent_class"> Parent terms</p> and children has separate <ul class="child_class">Child terms</ul>.

How should I do this?

---

I have done it using taxonomy_get_children(), but it is giving me the children of parent of the taxonomy whose ID is 1.

• child1
• child2
• child3

This is what I need, but now I want to get the children of parent child1. I tried to get them by reusing the above function but it give me this.

• child1
  • children of child1
• child1
• child2
• child3

Answer 1

Use nested foreach like below.

$terms = taxonomy_get_children(1);
foreach ($terms as $term) {
  $items[] = $term->name;
  $child_term = taxonomy_get_children($term->tid);
  if (!empty($child_term)) {
    foreach ($child_term as $child) {
      $items[] = $child->name;
    }

  }
}
return theme('item_list', array('items' => $items));