Уровневое меню

<?php
/**
 * @name UltimateParent
 * @version 2.0+ (requires MODx 0.9.5+)
 * @author Temus
 * 
 * @param &id The id of the document whose parent you want to find.
 * @param &top The top node for the search.
 * @param &topLevel The top level node for the search
 * @param &topLimit The bottom level node for the search
 * 
 * @license Public Domain, use as you like.
 * 
 * Based on the original UltimateParent 2.0 snippet by Jason Coward <[email protected]>
 */
$top= isset ($top) && intval($top) ? $top : 0;
$id= isset ($id) && intval($id) ? intval($id) : $modx->documentIdentifier;
$topLevel= isset ($topLevel) && intval($topLevel) ? intval($topLevel) : 0;
$topLimit= isset ($topLimit) && intval($topLimit) ? intval($topLimit) : 0;

if ($id && $id != $top) {
	$pid= $id;
	$crumbCount=0;
	$crumbArray[]=$pid;
	while ($pid != $top && $pid != 0) {
		$id= $pid;
		$parentIds= $modx->getParentIds($id, 1);
		$pid= array_pop($parentIds);
		$crumbCount++;
		$crumbArray[]=$pid;
		if ($pid == $top) {
			if ($topLimit && $topLimit<$crumbCount) {return 0;}
			if ($topLevel && $topLevel<=$crumbCount) {return $crumbArray[$crumbCount-$topLevel]; }
			if ($topLevel && $topLevel>$crumbCount) {return 0; }
			return $id;
		}
	}
}
return 0;
?>

$array_of_parametrs = array();
if (isset($top)) {$array_of_parametrs['top'] = $top;}
if (isset($topLevel)) {$array_of_parametrs['topLevel'] = $topLevel;}
if (isset($topLimit)) {$array_of_parametrs['topLimit'] = $topLimit;}
if (!empty($array_of_parametrs)) {
    $wf->_config['id'] = $modx->runSnippet('UltimateParent', $array_of_parametrs);
    if ($wf->_config['id']==0) {return;}
}