public function addFunction($function, $namespace = '')
    {
        static $port;
        static $operation;
        static $binding;

        if (!is_array($function)) {
            $function = (array) $function;
        }

        $uri = $this->getUri();

        if (!($this->_wsdl instanceof Zend_Soap_Wsdl)) {
            $parts = explode('.', basename($_SERVER['SCRIPT_NAME']));
            $name = $parts[0];
            $wsdl = new Zend_Soap_Wsdl($name, $uri, $this->_strategy);

            // The wsdl:types element must precede all other elements (WS-I Basic Profile 1.1 R2023)
            $wsdl->addSchemaTypeSection();

            $port = $wsdl->addPortType($name . 'Port');
            $binding = $wsdl->addBinding($name . 'Binding', 'tns:' .$name. 'Port');

            $wsdl->addSoapBinding($binding, $this->_bindingStyle['style'], $this->_bindingStyle['transport']);
            $wsdl->addService($name . 'Service', $name . 'Port', 'tns:' . $name . 'Binding', $uri);
        } else {
            $wsdl = $this->_wsdl;
        }

        foreach ($function as $func) {
            $method = $this->_reflection->reflectFunction($func);
            $this->_addFunctionToWsdl($method, $wsdl, $port, $binding);
        }
        $this->_wsdl = $wsdl;
    }