Nested category lists with links to term pages

Last updated February 19, 2008. Created by ugerhard on February 19, 2008.
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The following snippet will generate a nested link list of category terms for a given vocabulary:

<?php
// The ID of the taxonomy vocabulary for which you'd like to create a nested list
$vid = 1;

$depth = 0;
$tree = taxonomy_get_tree($vid); 

print '<ul>';
foreach ($tree as $term) {
  if ($term->depth > $depth) {
    print '<ul>';
    $depth = $term->depth;
  }
  if ($term->depth < $depth) {
    print '</ul>';
    $depth = $term->depth;
  }
  print '<li>' . l($term->name, 'taxonomy/term/' . $term->tid) . '</li>';
}
print '</ul>';
?>

Comments

alteration

Posted by mikegoodwin on March 22, 2008 at 3:47am

Is there a simple alteration that will make the format

<ul>
  <li>Term 1
    <ul>
      <li>Term 1.1</li>
    </ul>
  </li>
  <li>Term 2</li>
</ul>

The list terms with daughter unordered lists should not be closed until the daughter is complete. This method will make the Suckerfish method of menu alteration possible.

-Mike Goodwin
http://www.not2us.net
http://www.redleafmedia.com

Closing lists with more than one level depth

Posted by bullz on June 3, 2008 at 3:48pm

<?php
// The ID of the taxonomy vocabulary for which you'd like to create a nested list
$vid = 1;
$depth = 0;
$tree = taxonomy_get_tree($vid);

print '<ul class=repos>';
foreach ($tree as $term) {
    $count = "(".db_result(db_query("SELECT COUNT(nid) FROM {term_node} WHERE tid = %d", $term->tid)).")";    
    if ($term->depth > $depth) {
        print '<ul>';
        $depth = $term->depth;
    }
    if ($term->depth < $depth) {    
        for ($i=($depth - $term->depth);$i>=1;$i--) {
        print'</ul></li>';
        }
        $depth = $term->depth;
    }
    print '<li>' . l($term->name, 'taxonomy/term/' . $term->tid .'/all') . $count .'</li>';
}

print '</ul>';

?>

Not sure that's right

Posted by jeff h on June 20, 2008 at 1:41pm

Try this; I believe it closes the list items in the correct places;

			<?php
            // The ID of the taxonomy vocabulary for which you'd like to create a nested list
            $vid = 1;

            $depth = 0;
            $num_at_depth = 0;
            $tree = taxonomy_get_tree($vid); 

            print "<ul class=\"menu\">\n<li>";
            foreach ($tree as $term) {
            $count = db_result(db_query("SELECT COUNT(nid) FROM {term_node} WHERE tid = %d", $term->tid));    
              if ($term->depth > $depth) {
                print "\n<ul>\n<li>";
                $depth = $term->depth;
                    $num_at_depth = 0;
              }
              if ($term->depth < $depth) {
                print "</li>\n</ul>\n";
                $depth = $term->depth;
              }
              if (($term->depth == $depth) && ($num_at_depth > 0)) {
                  print "</li>\n<li>";
                }
              print l($term->name . ' ('.$count.')', 'taxonomy/term/' . $term->tid);
                $num_at_depth ++;
            }
            print "</li>\n</ul>\n";
            ?>

Jeff
________
Drupal Development,
http://marmaladesoul.com

________
Australian Drupal Development
http://marmaladesoul.com

Depth > 2

Posted by billyboylindien on June 29, 2008 at 5:21pm

It seems to not work with depth >2

This seems to be good:

<?php
            // The ID of the taxonomy vocabulary for which you'd like to create a nested list
            $vid = 10;

            $depth = 0;
            $num_at_depth = 0;
            $tree = taxonomy_get_tree($vid);

            print "<ul class=\"menu\">\n<li>";
            foreach ($tree as $term) {
            $diffdepth=0;
              if ($term->depth > $depth) {
                print "\n<ul>\n<li>";
                $depth = $term->depth;
                    $num_at_depth = 0;
              }
              if ($term->depth < $depth) {
                $diffdepth= $depth -$term->depth;
                while ($diffdepth > 0){
                    print "</li>\n</ul>\n";
                    $diffdepth -- ; 
                }
                    $depth = $term->depth;
              }
              if (($term->depth == $depth) && ($num_at_depth > 0)) {
                  print "</li>\n<li>";
                }
              print l($term->name, 'taxonomy/term/' . $term->tid);
                $num_at_depth ++;
            }
            print "</li>\n</ul>\n";
?>

Taxonomy Redirect

Posted by Rob_Feature on May 18, 2010 at 1:12pm

Just a note here:
I was trying to use this with Taxonomy Redirect module and the path of the taxonomy term must not be run through the proper functions to be rewritten. Therefore, the following line isn't redirected properly:
print l($term->name . ' ('.$count.')', 'taxonomy/term/' . $term->tid);
I ended up doing a custom version of this code to rewrite it myself, but just know that this won't work with Taxonomy Redirect because of the format of that link.