the demo is
$client=new soapclient('http://localhost/nusoap/samples/server/AuthorityService.php?wsdl',true);
but i want
$client=new soapclient('c:/localhost.wsdl');
dose nusoap support?
thanks

no.
you still have to specify 2nd parameters that confirms that you are supplying wsdl in the 1st.
Also from your post it's not clear if c:\localhost.wsdl is a correct filename.

1: $s=new soapclient('http://myserver/test?wsdl',"wsdl");
2: $result=$s->call('test', $parameters);

when 1 ,the program call the url myserver
and 2 the program also call the url myserver

I want to modify the nusoap.php
Let 1
$s=new soapclient('http://myserver/test?wsdl',"wsdl");
can't call the url myserver
because I use url filter in the webservices server
web services client must call the url once!
thanks

It's wrong assumption.
It would be the case if you worked with local copy of WSDL file.
Otherwise, your webserver client have to acquire WSDL each time your create soapclient.
But it does not mean that it have to do so each time your call Soap methods.
Did I make it clear?