ProductTable::isExistProduct

static function isExistProduct($product)
{
	$product = (int)$product;
	if ($product <= 0)
		return false;
	$existProduct = self::getList(array(
		'select' => array('ID'),
		'filter' => array('=ID' => $product)
	))->fetch();
	return (!empty($existProduct));
}