php用soap调用接口实例，返回值没有见到xml

<?php
require_once('lib/nusoap.php' );
$client = new nusoap_client("http://10.10.1.63:8888/cmtsmain/services/WebServiceServer?wsdl", 'wsdl' );
$client->soap_defencoding = 'utf-8' ;  
$client->decode_utf8 = false ;  
$client->xml_encoding = 'utf-8' ;
$err = $client ->getError();
if ($err ) {
       echo '<h2>Constructor error</h2><pre>' . $err . '</pre>' ;
       echo '<h2>Debug</h2><pre>' . htmlspecialchars( $client->getDebug(), ENT_QUOTES) . '</pre>' ;
       exit();
}
$pAppCode = '123' ;
$pCinemaID = '1561' ;
$secretKey = '1234567' ;
$pVerifyInfo = strtolower(md5(strtolower($pAppCode .$pCinemaID .$secretKey )));

//需要截取从第8位开始截取，取 16位的字符

$params = array (
    'pAppCode'          => "123" ,
    'pCinemaID'   => '1561',
    'pVerifyInfo'   => '7d1daac20de86ec2'
  
);
$result = $client ->call('getCinema', $params);
var_dump($result);

//如上的var_dump() 我原本期望的输出含有xml格式是：

<GetCinemaResult xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
     <ResultCode>0</ResultCode>
     <Cinemas>
          <Cinema>
               <PlaceNo>54</PlaceNo>
               <PlaceName>阳光影院</PlaceName>
               <CityNo></CityNo>
               <CreateDate></CreateDate>
          </Cinema>
          <Cinema>
               <PlaceNo>123</PlaceNo>
               <PlaceName>莲花影院</PlaceName>
               <CityNo>27</CityNo>
               <CreateDate></CreateDate>
          </Cinema>
          <Cinema>
               <PlaceNo>123</PlaceNo>
               <PlaceName>莲花影院</PlaceName>
               <CityNo>27</CityNo>
               <CreateDate></CreateDate>
          </Cinema>
          <Cinema>
               <PlaceNo>1561</PlaceNo>
               <PlaceName>中心地面</PlaceName>
               <CityNo>69</CityNo>
               <CreateDate></CreateDate>
          </Cinema>
     </Cinemas>
</GetCinemaResult>

但是浏览器一直输出：

array(1) { ["return"]=> string(649) "054阳光影院123莲花影院27123莲花影院271561中心地面69" } 眼看着649字符，却看不到xml标签，后来才想到var_dump出来得的xml标签都被浏览器给解析了。

if ($client ->fault) {
       echo '<h2>Fault (Expect - The request contains an invalid SOAP body)</h2><pre>'; print_r($result); echo '</pre>';
} else {
       $err = $client ->getError();
       if ($err ) {
             echo '<h2>Error</h2><pre>' . $err . '</pre>' ;
      } else {
             echo '<h2>Result</h2><pre>'; print_r( $result); echo '</pre>';
      }
}
echo '<h2>Request</h2><pre>' . htmlspecialchars( $client->request, ENT_QUOTES) . '</pre>' ;
echo '<h2>Response</h2><pre>' . htmlspecialchars( $client->response, ENT_QUOTES) . '</pre>' ;
echo '<h2>Debug</h2><pre>' . htmlspecialchars( $client->getDebug(), ENT_QUOTES) . '</pre>' ;