SimpleXMLElement() - XPath() & SOAP returning nothing - php

Question

After hours of searching, finding similar threads and still not being able to get it to work I've resorted to posting my specific problem. I'm getting a SOAP encoded XML response from a server that i want to use SimpleXMLElement() on, but i'm having a real hard time establishing a base path to work from.
I've tried two different methods:
xpath():
public function XMLParseUserData($xml)
{
$ActivityData = new SimpleXMLElement($xml);
$ActivityData->registerXPathNamespace("ns", "http://webservices.website.net/");
$basePath = $ActivityData->xpath('//ns:GetUserActivityDataResult/ActArray');
foreach ($basePath->ACT as $userActivity)
{
$this->uGUID = $userActivity->UserGUID;
echo $this->uGUID."<br />";
}
}
children():
public function XMLParseUserData($xml)
{
$ActivityData = new SimpleXMLElement($xml);
$basePath = $ActivityData->children('soap',true)->Body->GetUserActivityDataResponse->GetUserActivityDataResult->ActArray->ACT;
foreach ($basePath as $userActivity)
{
$this->uGUID = $userActivity->UserGUID;
echo $this->uGUID."<br />";
}
}
The XML response:
<?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>
<GetUserActivityDataResponse xmlns="http://webservices.website.net/">
<GetUserActivityDataResult>
<ResponseCode>SUCCESS</ResponseCode>
<FailedUserCount>0</FailedUserCount>
<ActCount>1</ActCount>
<ActArray>
<ACT>
<UserGUID>0dc299ba-XXXX-XXXX-XXXX-7ca097d51eb6</UserGUID>
<ActDataCount>15</ActDataCount>
<ActData>
<ACT_DATA>
<Start>2012-03-05T08:40:00</Start>
<End>2012-03-05T09:00:00</End>
<SourceCount>1</SourceCount>
<SourceData>
<ACT_SRC_DATA>
<Source>ACTIPED</Source>
<TypeCount>3</TypeCount>
<TypeData>
<ACT_TYPE_DATA>
<Type>WALK</Type>
<S>40</S>
<C>2</C>
<D>20</D>
<T>16</T>
</ACT_TYPE_DATA>
<ACT_TYPE_DATA>
<Type>RUN</Type>
<S>20</S>
<C>2</C>
<D>20</D>
<T>10</T>
</ACT_TYPE_DATA>
<ACT_TYPE_DATA>
<Type>OTHER</Type>
<S>0</S>
<C>0</C>
<D>0</D>
<T>28</T>
</ACT_TYPE_DATA>
</TypeData>
<MetricCount>0</MetricCount>
</ACT_SRC_DATA>
</SourceData>
</ACT_DATA>
</ActData>
</ACT>
</ActArray>
<AsOfServerTimeGMT>2012-03-06T16:41:41.513</AsOfServerTimeGMT>
</GetUserActivityDataResult>
</GetUserActivityDataResponse>
</soap:Body>
</soap:Envelope>
Neither method works and both leave me with the same error:
Warning: Invalid argument supplied for foreach() in /c08/domains/dev.mysite.com/html/class/XMLParse.class.php on line 29

Answer 1

It says:
<GetUserActivityDataResponse xmlns="http://webservices.website.net/">
and you are trying to do
$basePath = $soapEnvelope
->children('soap', true)
->Body
->GetUserActivityDataResponse
…
which means you try to get <soap:GetUserActivityDataResponse> which obviously doesnt exist. You have to do (demo)
$basePath = $soapEnvelope
->children('soap', true)
->Body
->children('http://webservices.website.net/')
->GetUserActivityDataResponse
->GetUserActivityDataResult
->ActArray
->ACT;
Actually, you could just do ->children() to jump back to the default namespace, but I find providing the namespace explicitly somewhat clearer. Your choice.
Your XPath fails because you didn't specify the namespace for ActArray. Also, when xpath() is successful, it returns an array of SimpleXmlElements. You tried array->ACT, which doesn't work because an array is not an object. The first ActArray is in $basePath[0]. So you have to adjust the code to
$basePath = $soapEnvelope->xpath('//ns:GetUserActivityDataResult/ns:ActArray');
foreach ($basePath[0]->ACT as $userActivity) {
…
To get the ACT elements directly, change the XPath to
//ns:GetUserActivityDataResult/ns:ActArray/ns:ACT