(PHP 4 >= 4.3.2, PHP 5)
streamWrapper::stream_flush — Flushes the output
This method is called in response to fflush().
If you have cached data in your stream but not yet stored it into the underlying storage, you should do so now.
Тази функция няма параметри.
Should return TRUE if the cached data was successfully stored (or if there was no data to store), or FALSE if the data could not be stored.
Забележка: If not implemented, FALSE is assumed as the return value.