how to display the taxonomy terms in hierarchies order? - drupal

Question

I have a vocabulary which displays the terms in the hierarchies order like the following.
parent1
child1
child2
parent2
child1
parent3
parent4
child1
child2
child3
This displays in taxonomy manager.
I want to create a page on which I call a function and pass the vid and displays the taxonomy terms of that vocabulary in hierarchies order just like in taxonomy manager.
I used the following code but it displays only the taxonomy terms not in a tree order.
$vid = 26;
$tree = taxonomy_get_tree($vid);
foreach($tree as $term) {
$output = l($term->name, taxonomy_term_path($term));
if ($term->children) {
$output .= theme('illogica_category_tree', $term->children);
}
}
print $output;
Any idea about this?

Answer 1

I use this:
$tree = extranet_get_nested_tree((int)$vid, null, $tid);
With this:
function extranet_get_nested_tree($terms = array(), $max_depth = NULL, $parent = 0, $parents_index = array(), $depth = 0) {
if (is_int($terms)) {
$terms = taxonomy_get_tree($terms);
}
foreach($terms as $term) {
foreach($term->parents as $term_parent) {
if ($term_parent == $parent) {
$return[$term->tid] = $term;
}
else {
$parents_index[$term_parent][$term->tid] = $term;
}
}
}
foreach($return as &$term) {
if (isset($parents_index[$term->tid]) && (is_null($max_depth) || $depth < $max_depth)) {
$term->children = extranet_get_nested_tree($parents_index[$term->tid], $max_depth, $term->tid, $parents_index, $depth + 1);
}
}
return $return;
}
And to print it out:
function extranet_output_nested_tree($tree) {
if (count($tree)) {
$output = '<ul class="nested-taxonomy-tree">';
foreach ($tree as $term) {
$output .= '<li class="taxonomy-term">';
$output .= t($term->name); //, taxonomy_term_path($term));
if ($term->children) {
$output .= extranet_output_nested_tree( $term->children);
}
$output .= '</li>';
}
$output .= '</ul>';
}
return $output;
}
Enjoy!

Answer 2

taxonomy_get_tree() should return the terms in the correct order, but the array is flat rather than nested. See taxonomy_get_tree() for more information and some sample functions to get a nested array.

Answer 3

Here is the solution `
foreach($terms as $term) {
foreach($term->parents as $term_parent) {
if ($term_parent == $parent) {
$return[$term->tid] = $term;
}
else {
$parents_index[$term_parent][$term->tid] = $term;
}
}
}
foreach($return as &$term) {
if (isset($parents_index[$term->tid]) && (is_null($max_depth) || $depth < $max_depth)) {
$term->children = taxonomy_get_nested_tree($parents_index[$term->tid], $max_depth, $term->tid, $parents_index, $depth + 1);
}
}
return $return;
}
function output_taxonomy_nested_tree($tree) {
if (count($tree)) {
$output = '<ul class="nav navbar-nav">';
foreach ($tree as $term) {
$output .= '<li class="taxonomy-term">' . l($term->name, "taxonomy/term/". $term->tid);
if ($term->children) {
$output .= output_taxonomy_nested_tree($term->children);
}
$output .= '</li>';
}
$output .= '</ul>';
}
return $output;
}
$tree= taxonomy_get_nested_tree(2,10);
$output=output_taxonomy_nested_tree($tree);
echo $output;`
If you want to print it in the specific region you needed just assign the output to a variable in preprocessor function and print the variable in the page tpl file.
$output=output_taxonomy_nested_tree($tree);
echo $output;`
to
$variables['output'] .=output_taxonomy_nested_tree($tree);
place the line
<?php print $output;?>
in your page tpl file