PHP DOM XML Creation

I am currently working on Shopify webhooks which posts XML to the Colorado timber line API. But due to the order protocol of the Colorado timber line API, it is required to modify the XML posted by Shopify webhook to be restuctured.

Here's how I did the restucturing:

$doc = new DOMDocument; 
$doc->load('timber.xml');
$thedocument = $doc->documentElement;
//this gives you a list of elements by tag name
$order_number = $thedocument->getElementsByTagName('order-number')->item(0);
$order_number_val = $order_number->textContent;

$shipping_address = $thedocument->getElementsByTagName('shipping-address')->item(0);
$shipping_address = $shipping_address->lastChild;
$shipping_address = $shipping_address->previousSibling;
$shipping_address = $shipping_address->previousSibling;
$shipping_address_val = $shipping_address->textContent;

$address1 = $thedocument->getElementsByTagName('shipping-address')->item(0);
$address1 = $address1->firstChild;
$address1_val = $address1->textContent;

$address2 = $address1->nextSibling;
$address2_val = $address2->textContent;

$city = $address2->nextSibling;
$city_val = $city->textContent;

$country = $city->nextSibling;
$country = $country->nextSibling;
$country_val = $country->textContent;

$province = $shipping_address->previousSibling;
$province = $province->previousSibling;
$province_val = $province->textContent;

$zip = $province->nextSibling;
$zip_val = $zip->textContent;

$email = $thedocument->getElementsByTagName('customer')->item(0);
$email = $email->firstChild;
$email = $email->nextSibling;
$email = $email->nextSibling;
$email_val = $email->textContent;

$phone = $province->previousSibling;
$phone_val = $phone->textContent;

$note = $email->nextSibling;
$note = $note->nextSibling;
$note = $note->nextSibling;
$note = $note->nextSibling;
$note = $note->nextSibling;
$note = $note->nextSibling;
$note_val = $note->textContent;

$fulfillment_service = $thedocument->getElementsByTagName('line-items')->item(0);
$fulfillment_service = $fulfillment_service->firstChild;
$fulfillment_service = $fulfillment_service->firstChild;
$fulfillment_service_val = $fulfillment_service->textContent;

$created_at = $thedocument->getElementsByTagName('created-at')->item(0);
$created_at_val = $created_at->textContent;


   /* create a dom document with encoding utf8 */
    $domtree = new DOMDocument('1.0', 'UTF-8');
    /* create the root element of the xml tree */
    $Order = $domtree->createElement("Order");
    $Order->setAttribute("OrderID",$order_number_val);
    $Order->setAttribute("AffiliateID","CT_0027393");
    /* append it to the document created */
    $Order = $domtree->appendChild($Order);

    /* append children to the root element of the document */
    $ShipToName = $domtree->createElement("ShipToName",$shipping_address_val);
    $ShipToName = $Order->appendChild($ShipToName);

    $ShipToContact = $domtree->createElement("ShipToContact",$shipping_address_val);
    $ShipToContact = $Order->appendChild($ShipToContact);

    $ShipToName2 = $domtree->createElement("ShipToName2");
    $ShipToName2 = $Order->appendChild($ShipToName2);

    $AddressLine1 = $domtree->createElement("AddressLine1",$address1_val);
    $AddressLine1 = $Order->appendChild($AddressLine1);

    $AddressLine2 = $domtree->createElement("AddressLine2",$address2_val);
    $AddressLine2->setAttribute("nil","true");
    $AddressLine2 = $Order->appendChild($AddressLine2);

    $AddressLine3 = $domtree->createElement("AddressLine3");
    $AddressLine3 = $Order->appendChild($AddressLine3);

    $City = $domtree->createElement("City", $city_val);
    $City = $Order->appendChild($City);

    $Country = $domtree->createElement("Country", $country_val);
    $Country = $Order->appendChild($Country);

    $State = $domtree->createElement("State", $province_val);
    $State = $Order->appendChild($State);

    $Province = $domtree->createElement("Province", $province_val);
    $Province = $Order->appendChild($Province);

    $Zip = $domtree->createElement("Zip", $zip_val);
    $Zip = $Order->appendChild($Zip);

    $Email = $domtree->createElement("Email", $email_val);
    $Email = $Order->appendChild($Email);

    $Phone = $domtree->createElement("Phone", $phone_val);
    $Phone = $Order->appendChild($Phone);

    $SpecialInstructions = $domtree->createElement("SpecialInstructions", $note_val);
    $SpecialInstructions->setAttribute("nil","true");
    $SpecialInstructions = $Order->appendChild($SpecialInstructions);

    $SpecialInstructions2 = $domtree->createElement("SpecialInstructions2");
    $SpecialInstructions2 = $Order->appendChild($SpecialInstructions2);

    $RequestedDeliveryDate = $domtree->createElement("RequestedDeliveryDate");
    $RequestedDeliveryDate = $Order->appendChild($RequestedDeliveryDate);

    $ShipMethod = $domtree->createElement("ShipMethod", $fulfillment_service_val);
    $ShipMethod = $Order->appendChild($ShipMethod);

    $PackingListInformation = $domtree->createElement("PackingListInformation");
    $PackingListInformation = $Order->appendChild($PackingListInformation);

    $Logo = $domtree->createElement("Logo");
    $Logo->setAttribute("URL","https://cdn.shopify.com/s/files/1/0668/2591/t/1/assets/logo.png?2387");
    $Logo = $PackingListInformation->appendChild($Logo);

    $Message1 = $domtree->createElement("Message1","Thanks for your order!");
    $Message2 = $domtree->createElement("Message2","Refer your friends for a discount!");
    $Message3 = $domtree->createElement("Message3");
    $Message1 = $PackingListInformation->appendChild($Message1);
    $Message2 = $PackingListInformation->appendChild($Message2);
    $Message3 = $PackingListInformation->appendChild($Message3);

    $OrderDate = $domtree->createElement("OrderDate", $created_at_val);
    $OrderDate = $PackingListInformation->appendChild($OrderDate);

    $SoldToName = $domtree->createElement("SoldToName",$shipping_address_val);
    $SoldToName = $PackingListInformation->appendChild($SoldToName);

    $SoldToAddressLine1 = $domtree->createElement("SoldToAddressLine1", $address1_val);
    $SoldToAddressLine2 = $domtree->createElement("SoldToAddressLine2", $address2_val);
    $SoldToAddressLine2->setAttribute("nil","true");
    $SoldToAddressLine3 = $domtree->createElement("SoldToAddressLine3");
    $SoldToCity = $domtree->createElement("SoldToCity", $city_val);
    $SoldToCountry = $domtree->createElement("SoldToCountry", $country_val);
    $SoldToState = $domtree->createElement("SoldToState", $province_val);
    $SoldToProvince = $domtree->createElement("SoldToProvince", $province_val);
    $SoldToZip = $domtree->createElement("SoldToZip", $zip_val);

    $SoldToAddressLine1 = $PackingListInformation->appendChild($SoldToAddressLine1);
    $SoldToAddressLine2 = $PackingListInformation->appendChild($SoldToAddressLine2);
    $SoldToAddressLine3 = $PackingListInformation->appendChild($SoldToAddressLine3);
    $SoldToCity = $PackingListInformation->appendChild($SoldToCity);
    $SoldToCountry = $PackingListInformation->appendChild($SoldToCountry);
    $SoldToState = $PackingListInformation->appendChild($SoldToState);
    $SoldToProvince = $PackingListInformation->appendChild($SoldToProvince);
    $SoldToZip = $PackingListInformation->appendChild($SoldToZip);

    $line_items = $thedocument->getElementsByTagName('line-item');
    $len = $line_items->length;
    //die(0);
    $line_item = array();
    $Imagesetimage =array();
    for ($i=0; $i<$len; $i++) {

    $line_item[$i] = $thedocument->getElementsByTagName('line-item')->item($i);
    $Imagesetimage[$i] = $thedocument->getElementsByTagName('value')->item($i);
    $line_item[$i] = $line_item[$i]->firstChild;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $line_item[$i] = $line_item[$i]->nextSibling;
    $Quantity = $line_item[$i]->textContent;
    $ItemID = $line_item[$i]->previousSibling;
    $ItemID = $ItemID->textContent;

    $sku = $line_item[$i]->nextSibling;
    $sku = $sku->nextSibling;
    $sku_val = $sku->textContent;

    $Imagesetimage_val = $Imagesetimage[$i]->textContent;

    $Merchandise = $domtree->createElement("Merchandise");
    $Merchandise->setAttribute("Quantity",$Quantity);
    $Merchandise->setAttribute("ItemID",$ItemID);
    $Merchandise = $Order->appendChild($Merchandise);

    $PartNumber = $domtree->createElement("PartNumber",$sku_val);
    $PartNumber = $Merchandise->appendChild($PartNumber);

    $Printmode = $domtree->createElement("Printmode","dark");
    $Printmode = $Merchandise->appendChild($Printmode);

    $ImageSet = $domtree->createElement("ImageSet");
    $ImageSet = $Merchandise->appendChild($ImageSet);

    $Image = $domtree->createElement("Image");
    $Image->setAttribute("URL",$Imagesetimage_val);
    $Image = $ImageSet->appendChild($Image);

    $PackageListOverride = $domtree->createElement("PackageListOverride");
    $PackageListOverride = $Merchandise->appendChild($PackageListOverride); 

    $ItemName = $domtree->createElement("ItemName");
    $ItemDescription = $domtree->createElement("ItemDescription");
    $ItemName = $PackageListOverride->appendChild($ItemName);   
    $ItemDescription = $PackageListOverride->appendChild($ItemDescription); 

    }
    /* get the xml printed */
    echo $domtree->save('xmlcreated.xml');

As you can see the code looks pretty ugly and I'm pretty sure shouldn't be such huge. I'm trying to modify the code to be pretty. I'm kind of new when it comes to write good code. Any Ideas on how I should be moving forward?