SOAP request & response parsing

public function parseSoapResponseToArray($response) {
    $xml = preg_replace('/(<\/?)(\w+):([^>]*>)/', '$1$2$3', $response);
    $xml = simplexml_load_string($xml);
    $json = json_encode($xml);
    return $responseArray = json_decode($json,true);
}
$request_xml = '<?xml version="1.0" encoding="UTF-8"?>
            <soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ws="http://ws.rating.uss.transforce.ca" xmlns:xsd="http://ws.rating.uss.transforce.ca/xsd" xmlns:xsd1="http://dto.uss.transforce.ca/xsd">
               <soapenv:Header/>
               <soapenv:Body>
                  <ws:getRates>
                     <ws:request>
                        <xsd:password>uss</xsd:password>
                        <xsd:user_id>admin@uss.com</xsd:user_id>
                        <xsd:shipment>
                           <xsd1:delivery_address_line_1>123 MAIN ST</xsd1:delivery_address_line_1>
                           <xsd1:delivery_city>MISSISSAUGA</xsd1:delivery_city>
                           <xsd1:delivery_country>CA</xsd1:delivery_country>
                           <xsd1:delivery_name>COMPANY NAME</xsd1:delivery_name>
                           <xsd1:delivery_postal_code>L5R3R3</xsd1:delivery_postal_code>
                           <xsd1:delivery_province>ON</xsd1:delivery_province>
                           <xsd1:dimension_unit>I</xsd1:dimension_unit>
                           <xsd1:packages>
                              <xsd1:package_info_num>
                                 <xsd1:name>LENGTH</xsd1:name>
                                 <xsd1:value>20.0</xsd1:value>
                              </xsd1:package_info_num>
                              <xsd1:package_info_num>
                                 <xsd1:name>WIDTH</xsd1:name>
                                 <xsd1:value>20.0</xsd1:value>
                              </xsd1:package_info_num>
                              <xsd1:package_info_num>
                                 <xsd1:name>HEIGHT</xsd1:name>
                                 <xsd1:value>20.0</xsd1:value>
                              </xsd1:package_info_num>
                              <xsd1:reported_weight>10</xsd1:reported_weight>
                           </xsd1:packages>
                           <xsd1:pickup_address_line_1>5555 DIXIE RD</xsd1:pickup_address_line_1>
                           <xsd1:pickup_city>MISSISSAUGA</xsd1:pickup_city>
                           <xsd1:pickup_name>LOOMIS EXPRESS</xsd1:pickup_name>
                           <xsd1:pickup_postal_code>L4W1E6</xsd1:pickup_postal_code>
                           <xsd1:pickup_province>ON</xsd1:pickup_province>
                           <xsd1:reported_weight_unit>L</xsd1:reported_weight_unit>
                           <xsd1:service_type>DD</xsd1:service_type>
                           <xsd1:shipment_info_str>
                              <xsd1:name>fragile</xsd1:name>
                              <xsd1:value>TRUE</xsd1:value>
                           </xsd1:shipment_info_str>
                           <xsd1:shipment_info_str>
                              <xsd1:name>sat_delivery</xsd1:name>
                              <xsd1:value>TRUE</xsd1:value>
                           </xsd1:shipment_info_str>
                           <xsd1:shipment_info_num>
                              <xsd1:name>declared_value</xsd1:name>
                              <xsd1:value>200</xsd1:value>
                           </xsd1:shipment_info_num>
                           <xsd1:shipper_num>HB4499</xsd1:shipper_num>
                           <xsd1:shipping_date>20170717</xsd1:shipping_date>
                        </xsd:shipment>
                     </ws:request>
                  </ws:getRates>
               </soapenv:Body>
            </soapenv:Envelope>';
            //Change this variables.
            $location_URL = 'https://sandbox.loomis-express.com/axis2/services/USSRatingService?wsdl';
            $action_URL = "https://sandbox.loomis-express.com/axis2/services/USSRatingService?wsdl";

            $client = new SoapClient(null, array(
            'location' => $location_URL,
            'uri'      => "",
            'trace'    => 1,
            ));
            try{
               //Get response from here
               $response = $client->__doRequest($request_xml,$location_URL,$action_URL,1);
               $responseArray = parseSoapResponseToArray($response);
            }
            catch (SoapFault $exception){
                var_dump(get_class($exception));
                var_dump($exception);
            }