HTTP_CONTINUE
HTTP_CONTINUE = 100
Representation of an outgoing, getServer-side response.
Per the HTTP specification, this interface includes properties for each of the following:
setStatusCode(integer $code, string $reason = '') : self
Return an instance with the specified status code and, optionally, reason phrase.
If no reason phrase is specified, will default recommended reason phrase for the response's status code.
| integer | $code | The 3-digit integer result code to set. | 
| string | $reason | The reason phrase to use with the provided status code; if none is provided, will default to the IANA name. | 
For invalid status code arguments.
setDate(\DateTime  $date) : \CodeIgniter\HTTP\ResponseInterface
                Sets the date header
| \DateTime | $date | 
setContentType(string $mime, string $charset = 'UTF-8') : \CodeIgniter\HTTP\ResponseInterface
Sets the Content Type header for this response with the mime type and, optionally, the charset.
| string | $mime | |
| string | $charset | 
setCache(array  $options = array()) : \CodeIgniter\HTTP\ResponseInterface
                A shortcut method that allows the developer to set all of the cache-control headers in one method call.
The options array is used to provide the cache-control directives for the header. It might look something like:
 $options = [
     'max-age'  => 300,
     's-maxage' => 900
     'etag'     => 'abcde',
 ];Typical options are:
| array | $options | 
send() : \CodeIgniter\HTTP\ResponseInterface
Sends the output to the browser.