foreach($products as $p){
            $p->set('published', 0);
            $p->save();
        }

<?php
if (empty($rid)) {$rid = $modx->resource->id;}
if (empty($pid)) {$pid = $modx->resource->parent;}
if (empty($delimeter)) {$delimeter = ' , ';}
$pdo = $modx->getService('pdoTools');
$scheme = $modx->getOption('link_tag_scheme', null, 'full', true);

$q = $modx->newQuery('msCategory');
$q->leftJoin('msCategoryMember', 'msCategoryMember', array(
    '`msCategory`.`id` = `msCategoryMember`.`category_id`'
));
$q->sortby('pagetitle','ASC');
$q->groupby('id');
$q->select($modx->getSelectColumns('msCategory'));
$q->where('`msCategoryMember`.`product_id` = '.$rid.' OR `id` = '.$pid);

$result = array();
$html = '';
if ($q->prepare() && $q->stmt->execute()) {
    while ($row = $q->stmt->fetch(PDO::FETCH_ASSOC)) {
        if($tpl){
            $html .= $pdo->parseChunk($tpl, $row);
        }
        else{
             $result[] = $row;
        }
    }
}
return $html ?: $result;

{'!SnippetName' | snippet: [
'rid' => $id,
'pid' => $parent
]}

[[!SnippetName?
&rid=`[[+id]]`
&pid=`[[+parent]]`
]]

'snippet' => '@FILE snippets/snippet.php',
/* или */
'snippet' => 'file:snippets/snippet.php',

'form' => '@FILE chunks/forms/zayavka.form.tpl'