php Header 函数使用

<?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');
######
?>

　　综上 Header 使用实例：Request >> PHP 返回json对象：

 * TODO 数据返回结构
 * @param $code
 * @param $msg
 * @param $data
 * @param $url
 * @param $wait
 * @return array
 */
function msg_array($code = 1,$msg="",$data=[],$url="",$wait= 3)
{
    $result = [
        'code' => $code,
        'msg'  => $msg,
        'data' => $data,
        'url'  => $url,
        'wait' => $wait,
    ];
    return $result;
}

header("Content-Type: application/json");
echo json_encode(msg_array(0,'logout success !'));exit;

　　

标准响应字段

媒体类型 Content-Type ： 常见的例子

• application/javascript
• application/json
• application/x-www-form-urlencoded
• application/xml
• application/zip
• application/pdf
• application/sql
• application/graphql
• application/ld+json
• application/msword (.doc)
• application/vnd.openxmlformats-officedocument.wordprocessingml.document(.docx)
• application/vnd.ms-excel (.xls)
• application/vnd.openxmlformats-officedocument.spreadsheetml.sheet (.xlsx)
• application/vnd.ms-powerpoint (.ppt)
• application/vnd.openxmlformats-officedocument.presentationml.presentation (.pptx)
• application/vnd.oasis.opendocument.text (.odt)
• audio/mpeg
• audio/ogg
• multipart/form-data
• text/css
• text/html
• text/xml
• text/csv
• text/plain
• image/png
• image/jpeg
• image/gif