setWsdl('https://api.example.com/1.2/mailmerge.asmx?WSDL') ->setUsername(DEMOS_ZEND_SERVICE_LIVEDOCX_USERNAME) ->setPassword(DEMOS_ZEND_SERVICE_LIVEDOCX_PASSWORD); $mailMerge->getTemplateFormats(); // then call methods as usual printf('Username : %s%sPassword : %s%s WSDL : %s%s%s', $mailMerge->getUsername(), PHP_EOL, $mailMerge->getPassword(), PHP_EOL, $mailMerge->getWsdl(), PHP_EOL, PHP_EOL ); unset($mailMerge, $mySoapClient);