[摘要]在照彭武兴先生的《PHP BIBLE》中所述，header可以送出Status标头，如 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...
在照彭武兴先生的《PHP BIBLE》中所述，header可以送出Status标头，如
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
……