(PHP 5 >= 5.3.0)
streamWrapper::stream_cast — Retrieve the underlaying resource
This method is called in response to stream_select().
Can be STREAM_CAST_FOR_SELECT when stream_select() is calling stream_cast() or STREAM_CAST_AS_STREAM when stream_cast() is called for other uses.
Should return the underlying stream resource used by the wrapper, or FALSE.