(PHP 5 >= 5.3.0, PHP 7, PHP 8)
streamWrapper::stream_set_option — Change stream options
$option, int $arg1, int $arg2): boolThis method is called to set options on the stream.
optionOne of:
STREAM_OPTION_BLOCKING (The method was called in response to stream_set_blocking())STREAM_OPTION_READ_TIMEOUT (The method was called in response to stream_set_timeout())STREAM_OPTION_WRITE_BUFFER (The method was called in response to stream_set_write_buffer())arg1
If option is
STREAM_OPTION_BLOCKING: requested blocking mode (1 meaning block 0 not blocking).STREAM_OPTION_READ_TIMEOUT: the timeout in seconds.STREAM_OPTION_WRITE_BUFFER: buffer mode (STREAM_BUFFER_NONE or STREAM_BUFFER_FULL).arg2
If option is
STREAM_OPTION_BLOCKING: This option is not set.STREAM_OPTION_READ_TIMEOUT: the timeout in microseconds.STREAM_OPTION_WRITE_BUFFER: the requested buffer size.
成功时返回 true， 或者在失败时返回 false。
If option is not implemented, false should be
returned.