(PHP 5 >= 5.3.0, PHP 7)
streamWrapper::stream_cast — Retrieve the underlaying resource
public streamWrapper::stream_cast ( int $cast_as ) : 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
.
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https://www.php.net/manual/en/streamwrapper.stream-cast.php