#define http_message_serialize(m, s, l) _http_message_serialize((m), (s), (l))
PHP_HTTP_API void _http_message_serialize(http_message *message, char **string, size_t *length);
#define http_message_serialize(m, s, l) _http_message_serialize((m), (s), (l))
PHP_HTTP_API void _http_message_serialize(http_message *message, char **string, size_t *length);