php 301 permanently redirect [php5.1 manual]

PHP下的301重定向

<?php
/**
 * HTTP Protocol defined status codes
 * @param int $num
 */

function HTTPStatus($num) {

 static $http = array (
  100 => "HTTP/1.1 100 Continue",
  101 => "HTTP/1.1 101 Switching Protocols",
  200 => "HTTP/1.1 200 OK",
  201 => "HTTP/1.1 201 Created",
  202 => "HTTP/1.1 202 Accepted",
  203 => "HTTP/1.1 203 Non-Authoritative Information",
  204 => "HTTP/1.1 204 No Content",
  205 => "HTTP/1.1 205 Reset Content",
  206 => "HTTP/1.1 206 Partial Content",
  300 => "HTTP/1.1 300 Multiple Choices",
  301 => "HTTP/1.1 301 Moved Permanently",
  302 => "HTTP/1.1 302 Found",
  303 => "HTTP/1.1 303 See Other",
  304 => "HTTP/1.1 304 Not Modified",
  305 => "HTTP/1.1 305 Use Proxy",
  307 => "HTTP/1.1 307 Temporary Redirect",
  400 => "HTTP/1.1 400 Bad Request",
  401 => "HTTP/1.1 401 Unauthorized",
  402 => "HTTP/1.1 402 Payment Required",
  403 => "HTTP/1.1 403 Forbidden",
  404 => "HTTP/1.1 404 Not Found",
  405 => "HTTP/1.1 405 Method Not Allowed",
  406 => "HTTP/1.1 406 Not Acceptable",
  407 => "HTTP/1.1 407 Proxy Authentication Required",
  408 => "HTTP/1.1 408 Request Time-out",
  409 => "HTTP/1.1 409 Conflict",
  410 => "HTTP/1.1 410 Gone",
  411 => "HTTP/1.1 411 Length Required",
  412 => "HTTP/1.1 412 Precondition Failed",
  413 => "HTTP/1.1 413 Request Entity Too Large",
  414 => "HTTP/1.1 414 Request-URI Too Large",
  415 => "HTTP/1.1 415 Unsupported Media Type",
  416 => "HTTP/1.1 416 Requested range not satisfiable",
  417 => "HTTP/1.1 417 Expectation Failed",
  500 => "HTTP/1.1 500 Internal Server Error",
  501 => "HTTP/1.1 501 Not Implemented",
  502 => "HTTP/1.1 502 Bad Gateway",
  503 => "HTTP/1.1 503 Service Unavailable",
  504 => "HTTP/1.1 504 Gateway Time-out"
  );

  header($http[$num]);
 }

 HTTPStatus(301);
 header( "Location: http://www.test.com" );

 // apache2 access_log
 // 127.0.0.1 - - [05/Apr/2008:21:45:56 +0800] "GET /redirect301.php HTTP/1.1" 301 -
 // 127.0.0.1 - - [05/Apr/2008:21:45:58 +0800] "GET / HTTP/1.1" 200 859
 ?>