class.ilHTTP.php

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<?php

class ilHTTP {

        protected static $http_codes = array(
                100 => 'Continue',
                101 => 'Switching Protocols',
                102 => 'Processing',
                200 => 'OK',
                201 => 'Created',
                202 => 'Accepted',
                203 => 'Non-Authoritative Information',
                204 => 'No Content',
                205 => 'Reset Content',
                206 => 'Partial Content',
                207 => 'Multi-Status',
                300 => 'Multiple Choices',
                301 => 'Moved Permanently',
                302 => 'Found',
                303 => 'See Other',
                304 => 'Not Modified',
                305 => 'Use Proxy',
                306 => 'Switch Proxy',
                307 => 'Temporary Redirect',
                400 => 'Bad Request',
                401 => 'Unauthorized',
                402 => 'Payment Required',
                403 => 'Forbidden',
                404 => 'Not Found',
                405 => 'Method Not Allowed',
                406 => 'Not Acceptable',
                407 => 'Proxy Authentication Required',
                408 => 'Request Timeout',
                409 => 'Conflict',
                410 => 'Gone',
                411 => 'Length Required',
                412 => 'Precondition Failed',
                413 => 'Request Entity Too Large',
                414 => 'Request-URI Too Long',
                415 => 'Unsupported Media Type',
                416 => 'Requested Range Not Satisfiable',
                417 => 'Expectation Failed',
                418 => 'I\'m a teapot',
                422 => 'Unprocessable Entity',
                423 => 'Locked',
                424 => 'Failed Dependency',
                425 => 'Unordered Collection',
                426 => 'Upgrade Required',
                449 => 'Retry With',
                450 => 'Blocked by Windows Parental Controls',
                500 => 'Internal Server Error',
                501 => 'Not Implemented',
                502 => 'Bad Gateway',
                503 => 'Service Unavailable',
                504 => 'Gateway Timeout',
                505 => 'HTTP Version Not Supported',
                506 => 'Variant Also Negotiates',
                507 => 'Insufficient Storage',
                509 => 'Bandwidth Limit Exceeded',
                510 => 'Not Extended',
        );
        const PREFIX = 'HTTP/1.1';


        public static function status($status) {
                if (!array_key_exists($status, self::$http_codes)) {
                        throw new ilException('Wrong HTTP-Status Code');
                }
                if (function_exists('http_response_code')) {
                        http_response_code($status);
                } else {
                        self::httpResponseCode($status);
                }
        }


        private static function httpResponseCode($status) {
                $protocol = (isset($_SERVER['SERVER_PROTOCOL']) ? $_SERVER['SERVER_PROTOCOL'] : self::PREFIX);
                $string = $protocol . ' ' . $status . ' ' . self::$http_codes[$status];
                $GLOBALS['http_response_code'] = $status;

                header($string, true, $status);
        }
}