streamWrapper::stream_cast()
(PHP 5 >= 5.3.0, PHP 7)
Retrieve the underlaying resource
说明
public streamWrapper::stream_cast(int $cast_as): resource
This method is called in response tostream_select().
参数
- $cast_as
Can be
STREAM_CAST_FOR_SELECTwhenstream_select()is callingstream_cast()orSTREAM_CAST_AS_STREAMwhenstream_cast()is called for other uses.
返回值
Should return the underlying stream resource used by the wrapper,orFALSE.
参见
stream_select()Runs the equivalent of the select() system call on the given arrays of streams with a timeout specified by tv_sec and tv_usec