[solved] searching Snippet to return a list of IDs from res. that are containers

<?php
// parent ID
$ids="11";
// how many levels deep
$depth="5";

// get all children
$childArray = $modx->getChildIds($ids, $depth);

// get IDs from all children that are containers
$container = $modx->getDocuments($childArray, 1, 0, "id", 'isfolder=1');

// count the IDs and loop through the array
$childrenCount = count($container); 
for($x=0; $x<$childrenCount; $x++) {
$folderids .= $container[$x]['id'].",";
}

return $folderids;
?>

return implode( ',',$folderids);

return $folderids; 

<?php

/*
 * This Snippet will return a comma separated List of container IDs
 * within a declared container.
 * e.g. [[getChildContainer? &parent=`2` $depth=`2`]]
 * btw. "print" to return the value is used because i call the Snippet within 
 * another Snippet. you can change "print" to "return" if you're not.
 */

// use parent ID if declared, otherwise default to 0 (site root)
$parent=isset($parent) ? $parent : '0';

// how many levels deep. i think it defaults to 10 levels if not set
$depth=isset($depth) ? $depth : '';

// get all children
$childArray = $modx->getChildIds($parent, $depth);

// get IDs from all children that are containers, published and not deleted
$container = $modx->getDocuments($childArray, 1, 0, 'id', 'isfolder=1');

// count the IDs
$childrenCount = count($container); 

// loop through the array if there are child containers
 if ($childrenCount!==0){
		for($x=0; $x<$childrenCount; $x++) {
		$folderids .= $container[$x]['id'].",";
		}
		// within another Snippet use print, instead of return
		print $folderids;
	} else {
	// return empty string if there are no containers
	print '';
	}

?>

<?php
$output ='';

include MODX_BASE_PATH.'assets/snippets/testsnippet/test_processor.php';

return $output;
?>

<?php
defined('IN_PARSER_MODE') or die('<b>UNAUTHORIZED_ACCESS_ERROR</b>');

// add whatever you want to the $output
$output .='<p>Just a test message</p>';
?>