Query XML via PHP: Get Value of Element

<?php
$xmlstr = <<<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:Header>
                <ResponseHeader xmlns="http://www.domain.com/">
                        <IsError>false</IsError>
                        <Message>Payment Success</Message>
                        <HasReturnObject>true</HasReturnObject>
                        <ReturnObjectDescription>Customer id</ReturnObjectDescription>
                        <ReturnObject xmlns:q1="http://microsoft.com/wsdl/types/" xsi:type="q1:guid">8b020dc7-7e3d-46d7-9f95-9f11d06dc475</ReturnObject>
                </ResponseHeader>
        </soap:Header>
        <soap:Body>
                <RegisterSubscriptionResponse xmlns="http://www.domain.com/">
                        <RegisterSubscriptionResult>0</RegisterSubscriptionResult>
                </RegisterSubscriptionResponse>
        </soap:Body>
</soap:Envelope>
XML;
 
$xml = preg_split ( '/\n/' , $xmlstr );
//$code = array(); $count = 0;
$target  = '<ReturnObject xmlns:q1="http://microsoft.com/wsdl/types/" xsi:type="q1:guid">';
for($i=0; $i<sizeof($xml); $i++) {
  $pos = strpos($xml[$i], $target);
  if ($pos) {
    $code = substr(trim($xml[$i]), strlen($target), 36);
    //$code[$count++] = substr(trim($xml[$i]), strlen($target), 36);
    //break;
  }
}
 
 
?>

                                              

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<?php
 
$string = <<<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:Header>
		<ResponseHeader xmlns="http://www.domain.com/">
			<IsError>false</IsError>
			<Message>Payment Success</Message>
			<HasReturnObject>true</HasReturnObject>
			<ReturnObjectDescription>Customer id</ReturnObjectDescription>
			<ReturnObject xmlns:q1="http://microsoft.com/wsdl/types/" xsi:type="q1:guid">8b020dc7-7e3d-46d7-9f95-9f11d06dc475</ReturnObject>
		</ResponseHeader>
	</soap:Header>
	<soap:Body>
		<RegisterSubscriptionResponse xmlns="http://www.domain.com/">
			<RegisterSubscriptionResult>0</RegisterSubscriptionResult>
		</RegisterSubscriptionResponse>
	</soap:Body>
</soap:Envelope>
XML;
 
 
$processed_string = str_replace("xmlns=", "ns=", $string);
 
$myxml = simplexml_load_string($processed_string);
 
$result = $myxml->xpath("//ReturnObject");
 
echo $result[0];
 
 
?>

                                              

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