Opencart 3 Cimri Entegrasoynu

Daha önceden (profesyonel olarak yazılmamış) yapılan Cimri ile basit ürün entegrasyon kodları (ana dizininize atın, URL si php dosyanız direkt olarak)

<?php 
$db_host        = 'localhost';
$db_user        = 'DB K.ADI';
$db_pass        = 'ŞİFRE';
$db_database    = 'DB ADI';
try {
    $dsn = 'mysql:host=' . $db_host . ';dbname=' . $db_database;
    $db = new PDO($dsn, $db_user, $db_pass);
} catch ( PDOException $e ){
     print $e->getMessage();
     exit();
}
$xml = new SimpleXMLElement('<MerchantItems xmlns="http://www.cimri.com/schema/merchant/upload" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"/>');
$urunler = $db->query("SELECT OP.product_id,OP.model,OP.quantity,OP.image,OP.price,OD.name,OD.description FROM `oc_product` OP LEFT JOIN oc_product_description OD ON(OD.product_id=OP.product_id) WHERE OP.quantity > 0 AND OP.date_available < NOW()");
            foreach($urunler as $u){
                if($u['image'] != ''){
                $urun = $xml->addChild('MerchantItem');
                $urun->addChild('merchantItemId', htmlspecialchars($u['product_id']));
                $urun->addChild('merchantItemCategoryId', htmlspecialchars(5814));
                $urun->addChild('merchantItemCategoryName',htmlspecialchars(strip_tags(html_entity_decode('CİMRİ KATEGORİ ADI'),'<IMG><br><p><u><b>')));
                $urun->addChild('brand', htmlspecialchars('MARKA'));
                $urun->addChild('model', htmlspecialchars($u['model']));
                $urun->addChild('itemTitle', htmlspecialchars($u['name']));
                $urun->addChild('merchantItemField', htmlspecialchars("Tüm ürünlerde ücretsiz kargo!"));
                $urun->addChild('itemUrl', htmlspecialchars('https://www.siteadi.com/index.php?route=product/product&product_id='.$u['product_id']));
                
                $urun->addChild('priceEft', htmlspecialchars($u['price']));
                $urun->addChild('pricePlusTax', htmlspecialchars($u['price']));
                $urun->addChild('itemUrlMobile', htmlspecialchars('https://www.siteadi.com/index.php?route=product/product&product_id='.$u['product_id']));
                $urun->addChild('itemImageUrl', htmlspecialchars('https://www.siteadi.com/image/'.$u['image']));
                $urun->addChild('shippingFee', htmlspecialchars(0));
                $urun->addChild('stockStatus', htmlspecialchars($u['quantity']));
                $urun->addChild('stockDetail', htmlspecialchars('  '));
                $urun->addChild('shippingDay', htmlspecialchars('1'));
                $urun->addChild('shippingDetail', htmlspecialchars('KARGO DETAYI'));
                $urun->addChild('typeOfWarranty', htmlspecialchars('0'));
                $urun->addChild('warrantyPeriod', htmlspecialchars('0'));
                
                }
            }
    
header('Content-type: text/xml');
print($xml->asXML());
?>

Bu kodu kendi sitemiz için kullanılabilir hale nasıl getirebiliriz?