ZVAL_LONG(&ztype, arg->type);
zend_call_method_with_2_params(arg->zconv, NULL, NULL, "converttostring", &rv, zparam, &ztype);
ZVAL_LONG(&ztype, arg->type);
zend_call_method_with_2_params(arg->zconv, NULL, NULL, "converttostring", &rv, zparam, &ztype);