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