(PHP 4 >= 4.3.0, PHP 5)
stream_context_set_option — Sets an option for a stream/wrapper/context
Sets an option on the specified context. value is set to option for wrapper
The stream or context resource to apply the options too.
The options to set for the default context.
Note:
options must be an associative array of associative arrays in the format $arr['wrapper']['option'] = $value.
Refer to context options and parameters for a listing of stream options.
成功时返回 TRUE， 或者在失败时返回 FALSE.