PHP 5.6使用SOAP 1.1使用Web服务时出现外部实体错误

Question

I have an WSDL file locally. In the documentation of the Web service it says:

"It uses the WCF basicHttpBinding that uses SOAP 1.1."

I have checked that my local WSDL file is to be found on the used URL.

When I run the code underneath, I get this error:

SOAP-ERROR: Parsing WSDL: Couldn't load from "localhost...?asmx": failed to load external entity ""localhost...?asmx"

<?php
try {
  $client = new SoapClient('http://localhost:8731/KPIntegrationService?asmx');
  // $client = new SoapClient(");   
} catch (Exception $e) {
    echo "<h2>Exception Error!</h2>";
    echo $e->getMessage();
}   
?>