static void sdl_serialize_key(zend_string *key, smart_str *out)
{
	if (key) {
		WSDL_CACHE_PUT_INT(ZSTR_LEN(key), out);
		WSDL_CACHE_PUT_N(ZSTR_VAL(key), ZSTR_LEN(key), out);
	} else {
		WSDL_CACHE_PUT_INT(WSDL_NO_STRING_MARKER, out);
	}
}
static void sdl_serialize_key(zend_string *key, smart_str *out)
{
	if (key) {
		WSDL_CACHE_PUT_INT(ZSTR_LEN(key), out);
		WSDL_CACHE_PUT_N(ZSTR_VAL(key), ZSTR_LEN(key), out);
	} else {
		WSDL_CACHE_PUT_INT(WSDL_NO_STRING_MARKER, out);
	}
}