header 和http状态码

select qg.*,gg.finalgrade,gi.itemname,gi.courseid,gi.itemmodule,gi.itemtype from mymdl_quiz_grades as qg left join mymdl_grade_grades as gg on qg.userid=gg.userid inner join mymdl_grade_items as gi on gg.itemid=gi.id where gi.courseid=2 and qg.userid=109;

 

状态码：https://zh.wikipedia.org/wiki/HTTP%E7%8A%B6%E6%80%81%E7%A0%81

• 200 用来表示请求成功.
• 300 来表示重定向.
• 400 用来表示请求出现问题.
• 500 用来表示伺服器出现问题.

 

<?php

header('HTTP/1.1 200 OK'); // ok 正常访问

header('HTTP/1.1 404 Not Found'); //通知浏览器 页面不存在

header('HTTP/1.1 301 Moved Permanently'); //设置地址被永久的重定向 301

header('Location: http://www.ithhc.cn/'); //跳转到一个新的地址

header('Refresh: 10; url=http://www.ithhc.cn/'); //延迟转向 也就是隔几秒跳转

header('X-Powered-By: PHP/6.0.0'); //修改 X-Powered-By信息

header('Content-language: en'); //文档语言

header('Content-Length: 1234'); //设置内容长度

header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT'); //告诉浏览器最后一次修改时间

header('HTTP/1.1 304 Not Modified'); //告诉浏览器文档内容没有发生改变

  

###内容类型###

header('Content-Type: text/html; charset=utf-8'); //网页编码

header('Content-Type: text/plain'); //纯文本格式

header('Content-Type: image/jpeg'); //JPG、JPEG

header('Content-Type: application/zip'); // ZIP文件

header('Content-Type: application/pdf'); // PDF文件

header('Content-Type: audio/mpeg'); // 音频文件

header('Content-type: text/css'); //css文件

header('Content-type: text/javascript'); //js文件

header('Content-type: application/json'); //json

header('Content-type: application/pdf'); //pdf

header('Content-type: text/xml'); //xml

header('Content-Type: application/x-shockw**e-flash'); //Flash动画

  

######

  

###声明一个下载的文件###

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename="ITblog.zip"');

header('Content-Transfer-Encoding: binary');

readfile('test.zip');

######

  

###对当前文档禁用缓存###

header('Cache-Control: no-cache, no-store, max-age=0, must-revalidate');

header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');

######

  

###显示一个需要验证的登陆对话框###

header('HTTP/1.1 401 Unauthorized');

header('WWW-Authenticate: Basic realm="Top Secret"');

######

  

  

###声明一个需要下载的xls文件###

header('Content-Disposition: attachment; filename=ithhc.xlsx');

header('Content-Type: application/vnd.openxmlformats-officedocument.spreadsheetml.sheet');

header('Content-Length: '.filesize('./test.xls'));

header('Content-Transfer-Encoding: binary');

header('Cache-Control: must-revalidate');

header('Pragma: public');

readfile('./test.xls');

######

?>