(PHP 5 >= 5.3.0, PHP 7, PHP 8)
streamWrapper::stream_cast — Retrieve the underlaying resource
This method is called in response to stream_select().
cast_as
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
.