Avoiding defaults

• Avoid default values
• Manually open and close nodes

<?php
require dirname( __DIR__ ) . '/vendor/autoload.php';

// example 3: Use add_parent_node() + add_node() to avoid default values.
$adf = ( new carmelosantana\SendADF\SendADF() )
    ->add_requestdate( '02/08/2021 10:41AM' )
    ->add_parent_node( 'vehicle', [
        'year' => 1999,
        'make' => 'Chevrolet',
        'model' => 'Blazer',
        'vin' => '2GTEK19R7V1511644',
        'stock' => 'P7286',
        'trim' => 'LT',
        'doors' => 4,
        'bodystyle' => 'SUV',
        'transmission' => 'A',
    ], [ 'interest' => 'buy', 'status' => 'used', 'this' => 'not in spec' ] )
        ->add_node( 'odometer', 90000, [ 'status' => 'replaced', 'units' => 'miles'] ) 
        ->add_parent_node( 'colorcombination', [
            'interiorcolor' => 'lush brown',
            'exteriorcolor' => 'emerald green',
            'preference' => '2'
        ], [], true )
    ->close_node()
    ->add_parent_node( 'customer' )
        ->add_parent_node( 'contact' )
            ->add_node( 'name', 'John', [ 'part' => 'first' ] )
            ->add_node( 'name', 'Doe', [ 'part' => 'last' ] )
            ->add_node( 'email', '[email protected]' )
            ->add_node( 'phone', '393-999-3922', [ 'type' => 'voice', 'time' => 'morning' ] )
        ->close_node()
        ->add_parent_node( 'timeframe', [ 'description' => 'Within 1 month' ], [], true )
        ->add_node( 'comments', 'Can you deliver my new car by next Thursday?' )
    ->close_node()
    ->add_parent_node( 'vendor' )
        ->add_node( 'vendorname', 'Carmelo\'s Internet Outlet' )
        ->add_node( 'url', 'https://carmelosantana.com' )
        ->add_parent_node( 'contact' )
            ->add_node( 'name', 'Carmelo Santana', [ 'part' => 'full' ] )
            ->add_node( 'email', '[email protected]' )
            ->add_node( 'phone', '333-999-2222', [ 'type' => 'voice', 'time' => 'evening'] )
            ->add_node( 'phone', '393-991-2999', [ 'type' => 'fax', 'time' => 'evening'] )
            ->add_parent_node( 'address', null, [ 'type' => 'business' ] )
                ->add_node( 'street', '86 Broadway', [ 'line' => 1 ] )
                ->add_node( 'street', 'First Floor', [ 'line' => 2 ] )
                ->add_node( 'city', 'Newburgh' )
                ->add_node( 'regioncode', 'NY' )
                ->add_node( 'postalcode', '12550-7638' )
                ->add_node( 'country', 'US' )
            ->close_node()
        ->close_node()
    ->close_node()
    ->add_parent_node( 'provider' )
        ->add_node( 'name', 'CarPoint' )
        ->add_node( 'service', 'Used Car Classifieds' )
        ->add_node( 'url', 'http://carpoint.msn.com' )
        ->add_node( 'email', '[email protected]' )
        ->add_node( 'phone', '425-555-1212' );
                
echo $adf->getPrettyPrintXML();

Output

<?xml version="1.0" encoding="UTF-8"?>
<?adf version="1.0"?>
<adf>
  <prospect status="new">
    <requestdate>2021-02-08T10:41:00-05:00</requestdate>
    <vehicle interest="buy" status="used">
      <year>1999</year>
      <make>Chevrolet</make>
      <model>Blazer</model>
      <vin>2GTEK19R7V1511644</vin>
      <stock>P7286</stock>
      <trim>LT</trim>
      <doors>4</doors>
      <bodystyle>SUV</bodystyle>
      <transmission>A</transmission>
      <odometer status="replaced" units="miles">90000</odometer>
      <colorcombination>
        <interiorcolor>lush brown</interiorcolor>
        <exteriorcolor>emerald green</exteriorcolor>
        <preference>2</preference>
      </colorcombination>
    </vehicle>
    <customer>
      <contact>
        <name part="first">John</name>
        <name part="last">Doe</name>
        <email>[email protected]</email>
        <phone type="voice" time="morning">393-999-3922</phone>
      </contact>
      <timeframe>
        <description>Within 1 month</description>
      </timeframe>
      <comments>Can you deliver my new car by next Thursday?</comments>
    </customer>
    <vendor>
      <vendorname>Carmelo's Internet Outlet</vendorname>
      <url>https://carmelosantana.com</url>
      <contact>
        <name part="full">Carmelo Santana</name>
        <email>[email protected]</email>
        <phone type="voice" time="evening">333-999-2222</phone>
        <phone type="fax" time="evening">393-991-2999</phone>
        <address type="business">
          <street line="1">86 Broadway</street>
          <street line="2">First Floor</street>
          <city>Newburgh</city>
          <regioncode>NY</regioncode>
          <postalcode>12550-7638</postalcode>
          <country>US</country>
        </address>
      </contact>
    </vendor>
    <provider>
      <name>CarPoint</name>
      <service>Used Car Classifieds</service>
      <url>http://carpoint.msn.com</url>
      <email>[email protected]</email>
      <phone>425-555-1212</phone>
    </provider>
  </prospect>
</adf>