Ще не зробив але є структура фіда. Тобто ви можете зробити копію фіда (зелена кнопка знизу в списку фідів) і через структуру (біла кнопка справа </>) додати
//headerXML
$xml = '<?xml version="1.0" encoding="UTF-8"?>';
$xml .= '<feed xmlns:vc="http://www.w3.org/2007/XMLSchema-versioning" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://www.google.com/shopping/reviews/schema/product/2.3/product_reviews.xsd">';
$xml .= '<version>2.3</version>';
$xml .= '<publisher><name>mirson.ua</name></publisher>';
$xml .= '<reviews>';
$xml = $this->unixml->exportToXml($startup, $xml, "start");
//headerXML
//generateXML
for($startup['iteration'] = 0; 1; $startup['iteration']++){
$controller_data = $this->load->controller($controller, $startup);
$startup['stat'] = $controller_data['data']['stat'];
if($controller_data['products']){
foreach($controller_data['products'] as $product_id => $product){
$rev_query = $this->db->query("SELECT * FROM " . DB_PREFIX . "review WHERE product_id = '" . (int)$product['product_original_id'] . "' ORDER BY review_id ASC");
foreach($rev_query->rows as $review){
$xml .= '<review>';
$xml .= '<review_id>' . $review['review_id'] . '</review_id>';
$xml .= '<reviewer><name>' . $review['author'] . '</name></reviewer>';
$xml .= '<review_timestamp>' . $review['date_added'] . '</review_timestamp>';
$xml .= '<content>' . $review['text'] . '</content>';
$xml .= '<review_url type="singleton">' . $product['url'] . '</review_url>';
$xml .= '<ratings><overall min="1" max="5">' . $review['rating'] . '</overall></ratings>';
$xml .= '<products>';
$xml .= '<product>';
$xml .= '<product_ids>';
$xml .= '<gtins>';
$option_query = $this->db->query("SELECT optsku FROM " . DB_PREFIX . "product_option_value WHERE product_id = '" . (int)$product['product_original_id'] . "'");
if($option_query->num_rows){
foreach($option_query->rows as $orow){
$xml .= '<gtin>' . $orow['optsku'] . '</gtin>';
}
}else{
$xml .= '<gtin>' . $product['model'] . '</gtin>';
}
$xml .= '</gtins>';
$xml .= '<brands><brand>' . $product['manufacturer'] . '</brand></brands>';
$xml .= '<product_name>' . $product['name'] . '</product_name>';
$xml .= '<product_url>' . $product['url'] . '</product_url>';
$xml .= '</product_ids>';
$xml .= '</product>';
$xml .= '</products>';
$xml .= '</review>';
}
}
} else {
break;
}
$xml = $this->unixml->exportToXml($controller_data['data'], $xml);
}
//generateXML
//footerXML
$xml .= '</reviews>';
$xml .= '</feed>';
$this->unixml->exportToXml($controller_data['data'], $xml, "finish");
//footerXML
Спробуйте, це тільки чорновий начерк, але якщо на зараз потрібно то можна зробити.