header可以送出Status标头，如
<?php

header("Status: 404 Not Found");

?>

就可以让用户浏览器出现文件找不到的404错误，但是我试了这样是不行的。

后来我到w3.org上查了http的相关资料，终于试出来了如何Header出状态代码(Status)，与大家分享。

其实应该是这样的:

Header("http/1.1 403 Forbidden");

?>

第一部分为HTTP协议的版本(HTTP-Version)

第二部分为状态代码(Status)

第三部分为原因短语(Reason-Phrase)

三部分中间用一个空格分开，且中间不能有回车,第一部分和第二部分是必需的，第三部分则是给人看的，可写可不写甚至乱写。

还有，这一句的输出必须在Html文件的第一行。

下面我给出各代码所代表的意思(是从w3.org上查到的,够权威了):

* 1xx: Informational - Request received, continuing process

* 2xx: Success - The action was successfully received, understood,

and accepted

* 3xx: Redirection - Further action must be taken in order to

complete the request

* 4xx: Client Error - The request contains bad syntax or cannot be

fulfilled

* 5xx: Server Error - The server failed to fulfill an apparently

valid request


| "100" ; Continue

| "101" ; Switching Protocols

| "200" ; OK

| "201" ; Created

| "202" ; Accepted

| "203" ; Non-Authoritative Information

| "204" ; No Content

| "205" ; Reset Content

| "206" ; Partial Content

| "300" ; Multiple Choices

| "301" ; Moved Permanently

| "302" ; Moved Temporarily

| "303" ; See Other

| "304" ; Not Modified

| "305" ; Use Proxy

| "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 Time-out

| "409" ; Conflict

| "410" ; Gone

| "411" ; Length Required

| "412" ; Precondition Failed

| "413" ; Request Entity Too Large

| "414" ; Request-URI Too Large

| "415" ; Unsupported Media Type

| "500" ; Internal Server Error

| "501" ; Not Implemented

| "502" ; Bad Gateway

| "503" ; Service Unavailable

| "504" ; Gateway Time-out

| "505" ; HTTP Version not supported