header.php.tmp

来自「PHP 知识管理系统（基于树结构的知识管理系统）, 英文原版的PHP源码。」· TMP 代码 · 共 532 行 · 第 1/2 页

            foreach ($this->_headers as $header => $value) {
                header($header .': '. $value);
            }
        }
        return true;
    }

    /**
     * Send Satus Code
     * 
     * Send out the given HTTP-Status code. Use this for example when you 
     * want to tell the client this page is cached, then you would call 
     * sendStatusCode(304).
     *
     * @see HTTP_Header_Cache::exitIfCached()
     * 
     * @access  public
     * @return  bool    Returns true on success or false if headers are already
     *                  sent.
     * @param   int     $code The status code to send, i.e. 404, 304, 200, etc.
     */
    function sendStatusCode($code)
    {
        if (headers_sent()) {
            return false;
        }
        
        if ($code == (int) $code && defined('HTTP_HEADER_STATUS_'. $code)) {
            $code = constant('HTTP_HEADER_STATUS_'. $code);
        }
        
        if (strncasecmp(PHP_SAPI, 'cgi', 3)) {
            header('HTTP/'. $this->_httpVersion .' '. $code);
        } else {
            header('Status: '. $code);
        }
        return true;
    }

    /**
     * Date to Timestamp
     * 
     * Converts dates like
     *      Mon, 31 Mar 2003 15:26:34 GMT
     *      Tue, 15 Nov 1994 12:45:26 GMT
     * into a timestamp, strtotime() didn't do it in older versions.
     *
     * @deprecated      Use PHPs strtotime() instead.
     * @access  public
     * @return  mixed   Returns int unix timestamp or false if the date doesn't
     *                  seem to be a valid GMT date.
     * @param   string  $date The GMT date.
     */
    function dateToTimestamp($date)
    {
        static $months = array(
            null => 0, 'Jan' => 1, 'Feb' => 2, 'Mar' => 3, 'Apr' => 4,
            'May' => 5, 'Jun' => 6, 'Jul' => 7, 'Aug' => 8, 'Sep' => 9,
            'Oct' => 10, 'Nov' => 11, 'Dec' => 12
        );
        
        if (-1 < $timestamp = strToTime($date)) {
            return $timestamp;
        }
        
        if (!preg_match('~[^,]*,\s(\d+)\s(\w+)\s(\d+)\s(\d+):(\d+):(\d+).*~',
            $date, $m)) {
            return false;
        }
        
        // [0] => Mon, 31 Mar 2003 15:42:55 GMT
        // [1] => 31 [2] => Mar [3] => 2003 [4] => 15 [5] => 42 [6] => 55
        return mktime($m[4], $m[5], $m[6], $months[$m[2]], $m[1], $m[3]);
    }

    /**
     * Redirect
     * 
     * This function redirects the client. This is done by issuing a Location 
     * header and exiting.  Additionally to HTTP::redirect() you can also add 
     * parameters to the url.
     * 
     * If you dont need parameters to be added, simply use HTTP::redirect()
     * otherwise use HTTP_Header::redirect().
     *
     * @see     HTTP::redirect()
     * @author  Wolfram Kriesing <[e-mail]>
     * @access  public
     * @return  void
     * @param   string  $url The URL to redirect to, if none is given it 
     *                  redirects to the current page.
     * @param   array   $param Array of query string parameters to add; usually
     *                  a set of key => value pairs; if an array entry consists
     *                  only of an value it is used as key and the respective
     *                  value is fetched from $GLOBALS[$value]
     * @param   bool    $session Whether the session name/id should be added
     */
    function redirect($url = null, $param = array(), $session = false)
    {
        if (!isset($url)) {
            $url = $_SERVER['PHP_SELF'];
        }
        
        $qs = array();

        if ($session) {
            $qs[] = session_name() .'='. session_id();
        }

        if (is_array($param) && count($param)) {
            if (count($param)) {
                foreach ($param as $key => $val) {
                    if (is_string($key)) {
                        $qs[] = urlencode($key) .'='. urlencode($val);
                    } else {
                        $qs[] = urlencode($val) .'='. urlencode(@$GLOBALS[$val]);
                    }
                }
            }
        }
        
        if ($qstr = implode('&', $qs)) {
            $purl = parse_url($url);
            $url .= (isset($purl['query']) ? '&' : '?') . $qstr;
        }

        parent::redirect($url);
    }

    /**#@+
     * @author  Davey Shafik <[e-mail]>
     * @param   int $http_code HTTP Code to check
     * @access  public
     */

    /**
     * Return HTTP Status Code Type
     *
     * @return int|false
     */
    function getStatusType($http_code) 
    {
        if(is_int($http_code) && defined('HTTP_HEADER_STATUS_' .$http_code) || defined($http_code)) {
            $type = substr($http_code,0,1);
            switch ($type) {
                case HTTP_HEADER_STATUS_INFORMATIONAL:
                case HTTP_HEADER_STATUS_SUCCESSFUL:
                case HTTP_HEADER_STATUS_REDIRECT:
                case HTTP_HEADER_STATUS_CLIENT_ERROR:
                case HTTP_HEADER_STATUS_SERVER_ERROR:
                    return $type;
                    break;
                default:
                    return false;
                    break;
            }
        } else {
            return false;
        }
    }

    /**
     * Return Status Code Message
     *
     * @return string|false
     */
    function getStatusText($http_code) 
    {
        if ($this->getStatusType($http_code)) {
            if (is_int($http_code) && defined('HTTP_HEADER_STATUS_' .$http_code)) {
                return substr(constant('HTTP_HEADER_STATUS_' .$http_code),4);
            } else {
                return substr($http_code,4);
            }
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is Information (1xx)
     *
     * @return boolean
     */
    function isInformational($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return $status_type{0} == HTTP_HEADER_STATUS_INFORMATIONAL;
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is Successful (2xx)
     *
     * @return boolean
     */
    function isSuccessful($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return $status_type{0} == HTTP_HEADER_STATUS_SUCCESSFUL;
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is a Redirect (3xx)
     *
     * @return boolean
     */
    function isRedirect($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return $status_type{0} == HTTP_HEADER_STATUS_REDIRECT;
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is a Client Error (4xx)
     *
     * @return boolean
     */
    function isClientError($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return $status_type{0} == HTTP_HEADER_STATUS_CLIENT_ERROR;
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is Server Error (5xx)
     *
     * @return boolean
     */
    function isServerError($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return $status_type{0} == HTTP_HEADER_STATUS_SERVER_ERROR;
        } else {
            return false;
        }
    }

    /**
     * Checks if HTTP Status code is Server OR Client Error (4xx or 5xx)
     *
     * @return boolean
     */
    function isError($http_code) 
    {
        if ($status_type = $this->getStatusType($http_code)) {
            return (($status_type == HTTP_HEADER_STATUS_CLIENT_ERROR) || ($status_type == HTTP_HEADER_STATUS_SERVER_ERROR)) ? true : false;
        } else {
            return false;
        }
    }
    /**#@-*/
}
?>