An SSH shell like a stream

Hi, In the description of ssh2_shell, there's: "Open a shell at the remote end and allocate a stream for it." So the result of this command must be a stream. Well, it's good, I'll use fgets, fwrite and stream_* functions ! BUT, the problem is that I can't use a SSH2 Stream with the stream_select function... Warning: stream_select() [function.stream-select]: cannot represent a stream of type SSH2 Channel as a select()able descriptor in XX on line XX Why I cannot ? Is there a workaround ? Regards, Samuel ROZE.