PHP Soap Client is not supporting WSDL extension while connecting to SAP system

The possible solution could be to update policy tag like this

<wsp:UsingPolicy wsdl:required="true"/>

Update the policy tag like this:

<wsp:UsingPolicy wsdl:required="false"/>

And try the service

Another possible option is to change /ws_policy/ to /standard/ and you will be able to use PHP Soap Client to consume Web Service.

Go to Web Service Administration in your SAP ECC system using SOAMANAGER -> SOA-Management

In URL of the browser, you can see the “ws_policy” tag -> replace this with “standard” and you will have WSDL without policy tag.