SimpleXML object (1 item)
[0] // <soap:Envelope>
	->children('soap', true)
		->Header[0]
			->children('s', true)
				->credentials[0]
					->children('', true)
						->username[0]
						->password[0]
		->Body[0]
			->children('tns', true)
				->DoSomething[0]
					->children('', true)
						->from[0]
						->to[0]