<?php

/**
 * Class RebillyHttpStatusCode
 * Helper class pre-defined Http response code
 */
class RebillyHttpStatusCode
{
    /**
     * Http response code
     */
    const STATUS_OK = 200;
    const STATUS_CREATED = 201;
    const STATUS_NO_CONTENT = 204;
    const ERROR_BAD_REQUEST = 400;
    const ERROR_UNAUTHORIZED = 401;
    const ERROR_REQUEST_FAILED = 402;
    const ERROR_FORBIDDEN = 403;
    const ERROR_NOT_FOUND = 404;
    const ERROR_INVALID_REQUEST = 405;
    const ERROR_REQUEST_TIMEOUT = 408;
    const ERROR_PRECONDITION_FAILED = 412;
    const ERROR_UNPROCESSABLE_ENTITY = 422;
    const ERROR_INTERNAL_500 = 500;
    const ERROR_INTERNAL_502 = 502;
    const ERROR_INTERNAL_503 = 503;
    const ERROR_INTERNAL_504 = 504;
}

<?php

/**
 * Class RebillyHttpStatusCode
 * Helper class pre-defined Http response code
 */
class RebillyHttpStatusCode
{
    /**
     * Http response code
     */
    const STATUS_OK = 200;
    const STATUS_CREATED = 201;
    const STATUS_ACCEPTED = 202;
    const STATUS_NO_CONTENT = 204;
    const REDIRECT_SEE_OTHER = 303;
    const ERROR_BAD_REQUEST = 400;
    const ERROR_UNAUTHORIZED = 401;
    const ERROR_REQUEST_FAILED = 402;
    const ERROR_FORBIDDEN = 403;
    const ERROR_NOT_FOUND = 404;
    const ERROR_INVALID_REQUEST = 405;
    const ERROR_REQUEST_TIMEOUT = 408;
    const ERROR_PRECONDITION_FAILED = 412;
    const ERROR_UNPROCESSABLE_ENTITY = 422;
    const ERROR_INTERNAL_500 = 500;
    const ERROR_INTERNAL_502 = 502;
    const ERROR_INTERNAL_503 = 503;
    const ERROR_INTERNAL_504 = 504;
}

Add some const in Http helper
Add some const in Http helper
