soap xml response - how to get that stubborn data out [duplicate] - php

Question

This question already has answers here:
Reference - How do I handle Namespaces (Tags and Attributes with a Colon in their Name) in SimpleXML?
(2 answers)
Closed 3 years ago.
I'm trying to get the contents of the faultstring element and I'm more comfortable with SimpleXML's object syntax ($xml->...->faultstring.) The DomDocument method below works, but I'd prefer to stick with SimpleXML.
PHP version 5.6.40, Libxml 2.9.1.
$xmlResponse = '<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<soap:Fault>
<faultcode>soap:Client</faultcode>
<faultstring>Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.</faultstring>
<detail />
</soap:Fault>
</soap:Body>
</soap:Envelope>';
// DOES NOT WORK
$xml = simplexml_load_string($xmlResponse,NULL,NULL,"http://schemas.xmlsoap.org/soap/envelope/");
$faultstring = (string) ($xml->Body->Fault->faultstring);
var_dump($faultstring);
// WORKS
$_DomObject = new DOMDocument;
$_DomObject->loadXML($xmlResponse);
if (!$_DomObject) die("Error while parsing the document");
$s = simplexml_import_dom($_DomObject);
foreach(['faultcode','faultstring','detail'] as $tag) {
echo $tag.' => '.$_DomObject->getElementsByTagName($tag)[0]->textContent.'<br/>';
}

Answer 1

<?php
$xmlResponse = <<<XML
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<soap:Body>
<soap:Fault>
<faultcode>soap:Client</faultcode>
<faultstring>Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.</faultstring>
<detail />
</soap:Fault>
</soap:Body>
</soap:Envelope>
XML;
XML namespaces are getting in the way; they're the soap: prefix on the element names. It's possible to register all the namespaces and get it working that way, but just using XPath is easier:
$xml = new SimpleXMLElement($xmlResponse);
$fault = $xml->xpath("//faultstring");
echo (string)$fault[0] . "\n";
And here's how it looks using namespaces. You still get the object syntax, but it becomes a lot more complicated.
$xml = new SimpleXMLElement($xmlResponse);
$fault = $xml->children("soap", true)->Body->children("soap", true)->Fault->children()->faultstring;
echo (string)$fault . "\n";
Output for both:
Server did not recognize the value of HTTP Header SOAPAction: https://gw1.domain.com:4430/.