1: <?php
 2: 
 3: namespace Psr\Http\Message;
 4: 
 5: /**
 6:  * Representation of an outgoing, server-side response.
 7:  *
 8:  * Per the HTTP specification, this interface includes properties for
 9:  * each of the following:
10:  *
11:  * - Protocol version
12:  * - Status code and reason phrase
13:  * - Headers
14:  * - Message body
15:  *
16:  * Responses are considered immutable; all methods that might change state MUST
17:  * be implemented such that they retain the internal state of the current
18:  * message and return an instance that contains the changed state.
19:  */
20: interface ResponseInterface extends MessageInterface
21: {
22:     /**
23:      * Gets the response status code.
24:      *
25:      * The status code is a 3-digit integer result code of the server's attempt
26:      * to understand and satisfy the request.
27:      *
28:      * @return int status code
29:      */
30:     public function getStatusCode();
31: 
32:     /**
33:      * Return an instance with the specified status code and, optionally, reason phrase.
34:      *
35:      * If no reason phrase is specified, implementations MAY choose to default
36:      * to the RFC 7231 or IANA recommended reason phrase for the response's
37:      * status code.
38:      *
39:      * This method MUST be implemented in such a way as to retain the
40:      * immutability of the message, and MUST return an instance that has the
41:      * updated status and reason phrase.
42:      *
43:      *     provided status code; if none is provided, implementations MAY
44:      *     use the defaults as suggested in the HTTP specification.
45:      *
46:      * @see http://tools.ietf.org/html/rfc7231#section-6
47:      * @see http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
48:      *
49:      * @param int    $code         the 3-digit integer result code to set
50:      * @param string $reasonPhrase The reason phrase to use with the
51:      *
52:      * @throws \InvalidArgumentException for invalid status code arguments
53:      *
54:      * @return self
55:      */
56:     public function withStatus($code, $reasonPhrase = '');
57: 
58:     /**
59:      * Gets the response reason phrase associated with the status code.
60:      *
61:      * Because a reason phrase is not a required element in a response
62:      * status line, the reason phrase value MAY be null. Implementations MAY
63:      * choose to return the default RFC 7231 recommended reason phrase (or those
64:      * listed in the IANA HTTP Status Code Registry) for the response's
65:      * status code.
66:      *
67:      * @see http://tools.ietf.org/html/rfc7231#section-6
68:      * @see http://www.iana.org/assignments/http-status-codes/http-status-codes.xhtml
69:      *
70:      * @return string reason phrase; must return an empty string if none present
71:      */
72:     public function getReasonPhrase();
73: }
74: