namespace NamespaceVendorCron;
use DOMDocument;
class Productexport extends MagentoFrameworkAppActionAction
{
   public function execute()
    {
     $objectManager =  MagentoFrameworkAppObjectManager::getInstance();
                $objDate = $objectManager->create('MagentoFrameworkStdlibDateTimeDateTime');
                $date = $objDate->gmtDate();
                $strdate = str_replace(' ', '-', $date);
                $strd = str_replace(':', '-', $strdate);
                $filesystem = $objectManager->get('MagentoFrameworkFilesystem');
                $directoryList = $objectManager->get('MagentoFrameworkAppFilesystemDirectoryList');
                $media = $filesystem->getDirectoryWrite($directoryList::MEDIA)->getAbsolutePath();
                $products = $objectManager->create('MagentoCatalogModelProduct')->getCollection();
                $products->addAttributeToSelect('*')->load();
                $file = $media."product.xml";
                    if (file_exists($file)) {
                        rename($file, $media.'product-'.$strd.'.xml');
                    }
                    $doc = new DOMDocument();
                    $doc->encoding = 'UTF-8';
                    $doc->formatOutput = true;
                    $root = $doc->createElement("products");
                    $doc->appendChild($root);
                    if ($products->getSize() > 0) {
                    foreach ($products as $_product) {
                        $product = $doc->createElement("product");

                        $id = $doc->createElement("id");
                        $id->appendChild(
                            $doc->createTextNode($_product->getId())
                        );
                        $product->appendChild($id);

                        $name = $doc->createElement("name");
                        $name->appendChild(
                            $doc->createTextNode(trim($_product->getName()))
                        );
                        $product->appendChild($name);

                        $description = $doc->createElement("description");
                        $str = strip_tags($_product->getDescription());
                        //preg_replace('/[^a-zA-Z0-9_ %[].()%&-]/s', '',  $str);
                        $description->appendChild(
                            $doc->createTextNode($str)
                        );
                        $product->appendChild($description);

                        $url = $doc->createElement("url");
                        $url->appendChild(
                            $doc->createTextNode(trim($_product->getProductUrl()))
                        );
                        $product->appendChild($url);

                        $brand = $doc->createElement("brand");
                        $brand->appendChild(
                            $doc->createTextNode($_product->getBrand())
                        );
                        $product->appendChild($brand);
                        $price = $doc->createElement("price");
                        $price->appendChild(
                            $doc->createTextNode(trim((int)$_product->getPrice()))
                        );
                        $product->appendChild($price);

                        $original_price = $doc->createElement("original_price");
                        $original_price->appendChild(
                            $doc->createTextNode(trim((int)$_product->getOriginalPrice()))
                        );
                        $product->appendChild($original_price);

                        $currency = $doc->createElement("currency");
                        $currency->appendChild(
                            $doc->createTextNode($_product->getCurrency())
                        );
                        $product->appendChild($currency);

                        $category = $doc->createElement("category");
                        $category->appendChild(
                            $doc->createTextNode($_product->getCategory())
                        );
                        $product->appendChild($category);
                        $root->appendChild($product);
                    }
                        file_put_contents($file, $doc->saveXML(), FILE_APPEND);
                    }
    }

}