How do Traverse Hierarchy?

[idleup]

Once you have a tree hierarchy using the ->toHiearchy() method how do you traverse it to output a

list or options for a drop down list?

[ghost]

you would want a recursive function, something like

public function printTree($root){
    $html = '';
    $html .= "<ul>";
    foreach($root as $r){

        $html .= "<li>". $r->name;
        if(count($r->children) > 0) {
            $html .= $this->printTree($r->children);
        }
        $html .= "</li>";
    }
    $html .= "</ul>";
    return $html;
}

this will produce a list with appropriate sub-lists.

for options for a drop down you could indent the hierarchy with something like:

public function printSelect($root){
    $html = '';
    $html .= "<select>";
    foreach($root as $r){
        $html .= $this->printOption($r);
    }
    $html .= "</select>";
    return $html;
}
public function printOption($node){
    $level = $node->getLevel();
    $indent = "";
    for($i = 0; $i < $level; $i++){
      $indent .= "&nbsp;|-&nbsp;";
    }
    $html = '<option value="'.$node->id . '">'.$indent . $node->name . '</option>';
    foreach($node->children as $child){
            $html .= $this->printOption($child);
    }
    return $html;
}

[idleup]

Perfect thanks, that is exactly what I needed.

[kampit]

@idleup how about with a hyperlink to the printTree?