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while running https://localhost/hw/ZeroWebserviceclient.php on browseriam getting following error

Fatal error: Uncaught SoapFault exception: [WSDL] SOAP-ERROR: Parsing WSDL: Couldn't load from 'http://localhost/WebServiceTutor ial/ZeroWebservice. wsdl' : failed to load external entity "http://localhost/WebServiceTutor ial/ZeroWebservice. wsdl" in C:\xampp\htdocs \hw\ZeroWebserv iceClient.php:3 Stack trace: #0 C:\xampp\htdocs \hw\ZeroWebserv iceClient.php(3 ): SoapClient->SoapClient('ht tp://localhos...') #1 {main} thrown in C:\xampp\htdocs \hw\ZeroWebserv iceClient.php on line 3

ZeroWebservicec lient.php code as below

<?php
ini_set('soap.w sdl_cache_enabl ed', '0'); // disabling WSDL cache
$client = new SoapClient("htt p://localhost/WebServiceTutor ial/ZeroWebservice. wsdl");
$return = $client->sayHelloWorld( 'User');
print_r($return );
?>

help me please its urgent