$id = isset($id) ? $id : $modx->resource->get('id');
$pids = $modx->getParentIds($id, 100, array('context' => 'web'));
return count($pids);
Source

$count = 0;
$parent = isset($parent) ? (integer) $parent : 0;
if ($parent > 0) {
    $criteria = array(
        'parent' => $parent,
        'deleted' => false,
        'published' => true,
    );
    $count = $modx->getCount('modResource', $criteria);
}
return (string) $count;
Source

if (!$tvName) {
    $modx->log(modX::LOG_LEVEL_ERROR, '[getCrosslinks] The variable tvName is not given.');
    return;
}

if (!$page) {
    $modx->log(modX::LOG_LEVEL_ERROR, '[getCrosslinks] The variable page is not given.');
    return;
}

$templateVar = "SELECT `id` FROM `" . $modx->getOption(xPDO::OPT_TABLE_PREFIX) . "site_tmplvars` WHERE `name` = '" . $tvName . "'";

$result = $modx->query($templateVar);
$templateVarId = 0;
if (!is_object($result)) {
    $modx->log(modX::LOG_LEVEL_ERROR, '[getCrosslinks] An error has occured: result is not an object. Line 18.');
    return;
} else {
    $row = $result->fetch(PDO::FETCH_ASSOC);
    $templateVarId = $row['id'];
}
if (!$templateVarId) {
    $modx->log(modX::LOG_LEVEL_ERROR, '[getCrosslinks] '. $templateVarName . ' is geen valide template variabel.');
    return;
}

$crosslinkIds = "SELECT `contentid`, `value` FROM `" . $modx->getOption(xPDO::OPT_TABLE_PREFIX) . "site_tmplvar_contentvalues` WHERE `tmplvarid` = '" . $templateVarId . "' AND `value` LIKE '%" . $page . "%'";
$result = $modx->query($crosslinkIds);
$resultsArray = array();
if (!is_object($result)) {
    $modx->log(modX::LOG_LEVEL_ERROR, '[getCrosslinks] An error has occured: result is not an object. Line 33');
    return;
} else {
    while ($r = $result->fetch(PDO::FETCH_ASSOC)) {
        $r['value'] = explode('||', $r['value']);
        if (in_array($page ,$r['value'])) {
            array_push($resultsArray, $r['contentid']);
        }
    }
    return implode(",", $resultsArray);
}
Source

/**
 * @todo: Is this snippet used anywhere?
 */

$parents = $modx->getOption('parents',$scriptProperties,true);

$output = $modx->runSnippet('getResources', (array(
    'parents' => $parents,
    'showHidden' => 1,
    'showUnpublished' => 1,
    'limit' => '99',
    'sortBy' => 'menuindex',
    'sortDir' => 'ASC',
    'tpl' => '@INLINE [[+pagetitle]]==[[+id]]',
    'outputSeparator' => '||'
)
));

return $output;
Source

/**
 * @name resourceMediaPath
 * @description Dynamically calculates the upload path for a given resource
 *
 * This Snippet is meant to dynamically calculate your baseBath attribute
 * for custom Media Sources.  This is useful if you wish to shepard uploaded
 * images to a folder dedicated to a given resource.  E.g. page 123 would
 * have its own images that page 456 could not reference.
 *
 * USAGE:
 * [[resourceMediaPath? &pathTpl=`assets/businesses/{id}/` &createFolder=`1`]]
 * [[resourceMediaPath? &pathTpl=`assets/test/{breadcrumb}`]]
 * [[resourceMediaPath? &pathTpl=`assets/test/{breadcrumb}` &breadcrumbdepth=`2`]]
 *
 * PARAMETERS
 * &pathTpl string formatting string specifying the file path.
 *		Relative to MODX base_path
 *		Available placeholders: {id}, {pagetitle}, {parent}
 * &docid (optional) integer page id
 * &createFolder (optional) boolean whether or not to create
 */
$pathTpl = $modx->getOption('pathTpl', $scriptProperties, '');
$docid = $modx->getOption('docid', $scriptProperties, '');
$createfolder = $modx->getOption('createFolder', $scriptProperties, false);
$tvname = $modx->getOption('tvname', $scriptProperties, '');

$path = '';
$createpath = false;

if (empty($pathTpl)) {
    $modx->log(MODX_LOG_LEVEL_ERROR, '[resourceMediaPath]: pathTpl not specified.');
    return;
}

if (empty($docid) && $modx->getPlaceholder('mediasource_docid')) {
    // placeholder was set by some script
    // warning: the parser may not render placeholders, e.g. &docid=`[[*parent]]` may fail
    $docid = $modx->getPlaceholder('mediasource_docid');
}

if (empty($docid) && $modx->getPlaceholder('docid')) {
    // placeholder was set by some script
    // warning: the parser may not render placeholders, e.g. &docid=`[[*parent]]` may fail
    $docid = $modx->getPlaceholder('docid');
}
if (empty($docid)) {

    //on frontend
    if (is_object($modx->resource)) {
        $docid = $modx->resource->get('id');
    }
    //on backend
    else {
        $createpath = $createfolder;
        // We do this to read the &id param from an Ajax request
        $parsedUrl = parse_url($_SERVER['HTTP_REFERER']);
        parse_str($parsedUrl['query'], $parsedQuery);

        if (isset($parsedQuery['amp;id'])) {
            $docid = (int)$parsedQuery['amp;id'];
        } elseif (isset($parsedQuery['id'])) {
            $docid = (int)$parsedQuery['id'];
        }
    }
}

if (empty($docid)) {
    $modx->log(MODX_LOG_LEVEL_ERROR, '[resourceMediaPath]: docid could not be determined.');
    return;
}

if ($resource = $modx->getObject('modResource', $docid)) {
    $path = $pathTpl;
    $ultimateParent = '';
    if (strstr($path, '{breadcrumb}') || strstr($path, '{ultimateparent}')) {
        $parentids = $modx->getParentIds($docid);
        $breadcrumbdepth = $modx->getOption('breadcrumbdepth', $scriptProperties, count($parentids));
        $breadcrumbdepth = $breadcrumbdepth > count($parentids) ? count($parentids) : $breadcrumbdepth;
        if (count($parentids) > 1) {
            $parentids = array_reverse($parentids);
            $parentids[] = $docid;
            $ultimateParent = $parentids[1];
        } else {
            $ultimateParent = $docid;
            $parentids = array();
            $parentids[] = $docid;
        }
    }

    if (strstr($path, '{breadcrumb}')) {
        $breadcrumbpath = '';
        for ($i = 1; $i <= $breadcrumbdepth; $i++) {
            $breadcrumbpath .= $parentids[$i] . '/';
        }
        $path = str_replace('{breadcrumb}', $breadcrumbpath, $path);
    }

    if (!empty($tvname)){
        $path = str_replace('{tv_value}', $resource->getTVValue($tvname), $path);
    }
    $path = str_replace('{id}', $docid, $path);
    $path = str_replace('{pagetitle}', $resource->get('pagetitle'), $path);
    $path = str_replace('{alias}', $resource->get('alias'), $path);
    $path = str_replace('{parent}', $resource->get('parent'), $path);
    $path = str_replace('{context_key}', $resource->get('context_key'), $path);
    $path = str_replace('{ultimateparent}', $ultimateParent, $path);
    if ($template = $resource->getOne('Template')) {
        $path = str_replace('{templatename}', $template->get('templatename'), $path);
    }
    if ($user = $modx->user) {
        $path = str_replace('{username}', $modx->user->get('username'), $path);
    }

    $fullpath = $modx->getOption('base_path') . $path;

    if ($createpath && !file_exists($fullpath)) {

        $permissions = octdec('0' . (int)($modx->getOption('new_folder_permissions', null, '755', true)));
        if (!@mkdir($fullpath, $permissions, true)) {
            $modx->log(MODX_LOG_LEVEL_ERROR, sprintf('[resourceMediaPath]: could not create directory %s).', $fullpath));
        } else {
            chmod($fullpath, $permissions);
        }
    }

    return $path;
} else {
    $modx->log(MODX_LOG_LEVEL_ERROR, sprintf('[resourceMediaPath]: resource not found (page id %s).', $docid));
    return;
}
Source