php header 404写法 php header函数用法

php header 404写法:

header("HTTP/1.1 404 Not Found");exit;

如果以上代码不凑效,可以试试以下代码: 
header("Status: 404 Not Found");

最好两段代码都写上.为什么一段代码可以,一段不行呢?我也不清楚,反正最好的写法如下: 

header("HTTP/1.1 404 Not Found");
header("Status: 404 Not Found");
exit;

多说一句,这段代码必须在任何输出之前执行! 
更多 php header函数 用法请查阅:  http://tuzwu.iteye.com/blog/search?query=header  

http状态码所代表的意思(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 


转自:http://tuzwu.iteye.com/blog/690610

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