Client depend on the language that we used to call the web service.  For PHP we used SOAP client.
 
For example our WSDL is : http://www.example.com/developer/webservice/testservice/wsdl We can call it like below:
 

$WSDL_URL = 'http://www.example.com/developer/webservice/testservice/wsdl';
 
// Create Service
$soapClient = new SoapClient($WSDL_URL);
 
// Call function from other location: 
$time = $soapClient->getMyTime('2013-01-01');