php_http_expect(SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS(), "|S!S!", &driver_name, &persistent_handle_name), invalid_arg, return);
if (!zend_hash_num_elements(&php_http_client_drivers)) {
php_http_expect(SUCCESS == zend_parse_parameters(ZEND_NUM_ARGS(), "|S!S!", &driver_name, &persistent_handle_name), invalid_arg, return);
if (!zend_hash_num_elements(&php_http_client_drivers)) {