PHP中如何使用header发送头部信息

在照彭武兴先生的《PHP BIBLE》中所述,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

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