yii\mongodb\file\StreamWrapper::stream_flush PHP Метод

This method is called in response to fflush() and when the stream is being closed while any unflushed data has been written to it before.

См. также: fflush()

public stream_flush ( ) : boolean
Результат	boolean	whether cached data was successfully stored.

    public function stream_flush()
    {
        return true;
    }

StreamWrapper