PHP Class for HTTP Response Status Codes

http_response_code.php

<?php
/**
* StatusCodes provides named constants for
* HTTP protocol status codes. Written for the
* Recess Framework (http://www.recessframework.com/)
*
* @author Kris Jordan
* @license MIT
* @package recess.http
*
* usage: <?php header(StatusCodes::httpHeaderFor(503)); ?>
*/

class StatusCodes
{
  // [Informational 1xx]
  const HTTP_CONTINUE = 100;
  const HTTP_SWITCHING_PROTOCOLS = 101;
  // [Successful 2xx]
  const HTTP_OK = 200;
  const HTTP_CREATED = 201;
  const HTTP_ACCEPTED = 202;
  const HTTP_NONAUTHORITATIVE_INFORMATION = 203;
  const HTTP_NO_CONTENT = 204;
  const HTTP_RESET_CONTENT = 205;
  const HTTP_PARTIAL_CONTENT = 206;
  // [Redirection 3xx]
  const HTTP_MULTIPLE_CHOICES = 300;
  const HTTP_MOVED_PERMANENTLY = 301;
  const HTTP_FOUND = 302;
  const HTTP_SEE_OTHER = 303;
  const HTTP_NOT_MODIFIED = 304;
  const HTTP_USE_PROXY = 305;
  const HTTP_UNUSED = 306;
  const HTTP_TEMPORARY_REDIRECT = 307;
  // [Client Error 4xx]
  const errorCodesBeginAt = 400;
  const HTTP_BAD_REQUEST = 400;
  const HTTP_UNAUTHORIZED = 401;
  const HTTP_PAYMENT_REQUIRED = 402;
  const HTTP_FORBIDDEN = 403;
  const HTTP_NOT_FOUND = 404;
  const HTTP_METHOD_NOT_ALLOWED = 405;
  const HTTP_NOT_ACCEPTABLE = 406;
  const HTTP_PROXY_AUTHENTICATION_REQUIRED = 407;
  const HTTP_REQUEST_TIMEOUT = 408;
  const HTTP_CONFLICT = 409;
  const HTTP_GONE = 410;
  const HTTP_LENGTH_REQUIRED = 411;
  const HTTP_PRECONDITION_FAILED = 412;
  const HTTP_REQUEST_ENTITY_TOO_LARGE = 413;
  const HTTP_REQUEST_URI_TOO_LONG = 414;
  const HTTP_UNSUPPORTED_MEDIA_TYPE = 415;
  const HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416;
  const HTTP_EXPECTATION_FAILED = 417;
  // [Server Error 5xx]
  const HTTP_INTERNAL_SERVER_ERROR = 500;
  const HTTP_NOT_IMPLEMENTED = 501;
  const HTTP_BAD_GATEWAY = 502;
  const HTTP_SERVICE_UNAVAILABLE = 503;
  const HTTP_GATEWAY_TIMEOUT = 504;
  const HTTP_VERSION_NOT_SUPPORTED = 505;
  private static $messages = array(
  // [Informational 1xx]
  100 => '100 Continue', 101 => '101 Switching Protocols',
  // [Successful 2xx]
  200 => '200 OK', 201 => '201 Created', 202 => '202 Accepted', 203 => '203 Non-Authoritative Information', 204 => '204 No Content', 205 => '205 Reset Content', 206 => '206 Partial Content',
  // [Redirection 3xx]
  300 => '300 Multiple Choices', 301 => '301 Moved Permanently', 302 => '302 Found', 303 => '303 See Other', 304 => '304 Not Modified', 305 => '305 Use Proxy', 306 => '306 (Unused)', 307 => '307 Temporary Redirect',
  // [Client Error 4xx]
  400 => '400 Bad Request', 401 => '401 Unauthorized', 402 => '402 Payment Required', 403 => '403 Forbidden', 404 => '404 Not Found', 405 => '405 Method Not Allowed', 406 => '406 Not Acceptable', 407 => '407 Proxy Authentication Required', 408 => '408 Request Timeout', 409 => '409 Conflict', 410 => '410 Gone', 411 => '411 Length Required', 412 => '412 Precondition Failed', 413 => '413 Request Entity Too Large', 414 => '414 Request-URI Too Long', 415 => '415 Unsupported Media Type', 416 => '416 Requested Range Not Satisfiable', 417 => '417 Expectation Failed',
  // [Server Error 5xx]
  500 => '500 Internal Server Error', 501 => '501 Not Implemented', 502 => '502 Bad Gateway', 503 => '503 Service Unavailable', 504 => '504 Gateway Timeout', 505 => '505 HTTP Version Not Supported');

  public static function httpHeaderFor($code)
  {
    return 'HTTP/1.1 '.self::$messages[$code];
  }

  public static function getMessageForCode($code)
  {
    return self::$messages[$code];
  }

  public static function isError($code)
  {
    return is_numeric($code) && $code >= self::HTTP_BAD_REQUEST;
  }

  public static function canHaveBody($code)
  {
    return
    // True if not in 100s
    ($code < self::HTTP_CONTINUE || $code >= self::HTTP_OK) && // and not 204 NO CONTENT
    $code != self::HTTP_NO_CONTENT && // and not 304 NOT MODIFIED
    $code != self::HTTP_NOT_MODIFIED;
  }
}
?>