Catch one value with xpdo [SOLVED]

$output = '';

$query = $modx->newQuery('Product');
$query->select($modx->getSelectColumns('Product','Product','',array('id')));
$query->where(array(
   'alias' => 'PRODUCT-NAME',
));
$products = $modx->getCollection('Product',$query);

foreach ($products as $product) {
  
  $output = $product->get('id');
  
}

return $output;

<?php
$output = '';
 
$query = $modx->newQuery('Product');
$query->select($modx->getSelectColumns('Product','Product','',array('id')));
$query->where(array(
   'alias' => 'PRODUCT-NAME',
));

$output = $modx->getValue($query->prepare());

return $output;

$query->select($modx->getSelectColumns('Product','Product','',array('id', 'title')));

<?php
$product = $modx->getObject('Product', array('alias' => 'PRODUCT-NAME'));
return $product ? implode('-', $product->get(array('id', 'pagetitle'))) : 'Nothing was retrieved!';

<?php
$output = '';
  
$query = $modx->newQuery('Product');
$query->select($modx->getSelectColumns('Product','Product','',array('id', 'pagetitle')));
$query->where(array(
   'alias' => 'PRODUCT-NAME',
));
if ($query->prepare() && $query->stmt->execute()) {
    $row = $query->stmt->fetch(PDO::FETCH_ASSOC);
    $output = "{$row['id']}, {$row['pagetitle']}";
    $query->stmt->closeCursor();
}
 
return $output;