Parse Soap Response with SimpleXML problem

So I am making a soap call in PHP using fopen.  I cannot figure out how to parse to a specific value in the soap env response to save my life.

I have been Topekaing( errr Googleing) this for hours and have tried everything from declare namespaces to removing the colons etc...

Any help woudl be appreciated!
//soap req env

$contents = '<soapenv:Envelope xmlns:soapenv="">

//Soap Response

<?xml version='1.0' encoding='utf-8'?>
	<soapenv:Envelope xmlns:soapenv="">
		<soapenv:Header />
			<ns2:PayResponse xmlns:ns2="">

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This issue is discussed here:

Basically, they are getting rid of the colon between the namespace and the tag name:
$xmlString = preg_replace("/(<\/?)(\w+):([^>]*>)/", "$1$2$3", $response);

then they load the "clean" xml (which is now in $xmlString) into simple xml

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