<?php
declare(strict_types=1);
namespace Psr\Http\Message;
/**
* Representation of an outgoing, server-side response.
*
* Per the HTTP specification, this interface includes properties for
* each of the following:
*
* - Protocol version
* - Status code and reason phrase
* - Headers
* - Message body
*
* Responses are considered immutable; all methods that might change state MUST
* be implemented such that they retain the internal state of the current
* message and return an instance that contains the changed state.
*/
interface ResponseInterface extends MessageInterface
{
/**
* Gets the response status code.
*
* The status code is a 3-digit integer result code of the server's attempt
* to understand and satisfy the request.
*
* @return int Status code.
*/
public function getStatusCode();
/**
* Return an instance with the specified status code and, optionally, reason phrase.
*
* If no reason phrase is specified, implementations MAY choose to default
* to the RFC 7231 or IANA recommended reason phrase for the response's
* status code.
*
* This method MUST be implemented in such a way as to retain the
* immutability of the message, and MUST return an instance that has the
* updated status and reason phrase.
*
* @link http://tools.ietf.org/html/rfc7231#section-6
* @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
* @param int $code The 3-digit integer result code to set.
* @param string $reasonPhrase The reason phrase to use with the
* provided status code; if none is provided, implementations MAY
* use the defaults as suggested in the HTTP specification.
* @return static
* @throws \InvalidArgumentException For invalid status code arguments.
*/
public function withStatus(int $code, string $reasonPhrase = '');
/**
* Gets the response reason phrase associated with the status code.
*
* Because a reason phrase is not a required element in a response
* status line, the reason phrase value MAY be null. Implementations MAY
* choose to return the default RFC 7231 recommended reason phrase (or those
* listed in the IANA HTTP Status Code Registry) for the response's
* status code.
*
* @link http://tools.ietf.org/html/rfc7231#section-6
* @link http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
* @return string Reason phrase; must return an empty string if none present.
*/
public function getReasonPhrase();
}