php 7 DomDocument XML xpath->query get subnode values

Question

I'm trying to extract some info from eBaysvc.wsdl: passing API_Name I want to retrieve the Names of the Nodes required for such API and some more info let's suppose we want to get AddDispute Nodes, AddDisputeNode has as first node...

<xs:element name="DisputeExplanation" type="ns:DisputeExplanationCodeType" minOccurs="0">
    <xs:annotation>
        <xs:documentation>
            This enumerated ....
        </xs:documentation>
        <xs:appinfo>
            <CallInfo>
                <CallName>AddDispute</CallName>
                <RequiredInput>Yes</RequiredInput>
                <allValuesExcept>PaymentMethodNotSupported, ShipCountryNotSupported, Unspecified, UPIAssistance, UPIAssistanceDisabled</allValuesExcept>
            </CallInfo>
            <SeeLink>
                <Title>Creating and Managing Disputes With Trading API</Title>
                <URL>http://developer.ebay.com/DevZone/guides/features-guide/default.html#development/UPI-DisputesAPIManagement.html#UsingAddDispute</URL>
            </SeeLink>
        </xs:appinfo>
    </xs:annotation>
</xs:element>

Therefore I built the following script:

$file = 'ebaysvc.wsdl';
$xmlDoc = new DOMDocument('1.0','UTF-8');
$xmlDoc->preserveWhiteSpace = false;
$xmlDoc->formatOutput = true;
$xmlDoc->load($file);
$xpath = new DomXpath($xmlDoc);
$xpath->registerNamespace('xs', 'http://www.w3.org/2001/XMLSchema');

$API='AddDispute';

$Nodes = $xpath->query('//xs:complexType[@name="'.$API.'RequestType"]/xs:complexContent/xs:extension/xs:sequence')->item(0);

foreach($Nodes->childNodes as $node)
{
  $Node_name=$node->getAttribute('name');
  $Node_type=str_replace(['ns:','xs:'],'',$node->getAttribute('type'));
  echo "<br />".$Node_name.' => '.$Node_type;  
}

But I need also the Value of the node and I expected to get it adding this instruction the foreach loop:

$RequiredInput = $xpath->query('xs:annotation/xs:appinfo/CallInfo/RequiredInput',$node)->item(0));

while I get no result:

the only way I got it is to add 2 nested loops:

$RequiredInput = $xpath->query('xs:annotation/xs:appinfo',$node);//->item(0);
  foreach($RequiredInput->childNodes as $nn)
  {
    foreach($nn->childNodes as $nnn)
    {
      echo '<br />'.$nnn->nodeName.' => '.$nnn->nodeValue;
    }
  }

It seems does not accept that inner nodes does not have xs: namespace..

but this seems me a nonsense, but I can't find the right solution. Can suggest me what I'm doing wrongly?

score 1 · Accepted Answer · answered Aug 13 '19 at 08:29

As the complete document declares xmlns="urn:ebay:apis:eBLBaseComponents" the non-prefixed elements like CallInfo end up in that default namespace urn:ebay:apis:eBLBaseComponents and therefore, as with any elements in the default namespace, to select them with XPath 1.0, you need to use a prefix e.g.

$xpath->registerNamespace('ebl', 'urn:ebay:apis:eBLBaseComponents');

$RequiredInput = $xpath->query('xs:annotation/xs:appinfo/ebl:CallInfo/ebl:RequiredInput',$node)

as your current attempt with e.g. CallInfo tries to select elements with local name CallInfo in no namespace while you need to select the CallInfo elements in that particular namespace.

You're fully right..Thanks a lot! Now I can work on recursion although I think I will need further help :-( — Joe, Aug 13 '19 at 08:37

php 7 DomDocument XML xpath->query get subnode values

1 Answers1