php头部返回状态码

// ok 正常访问

header('HTTP/1.1 200 OK');

//通知浏览器 页面不存在

header('HTTP/1.1 404 Not Found');

//设置地址被永久的重定向 301

header('HTTP/1.1 301 Moved Permanently');

//跳转到一个新的地址

header('Location: http://xxxx/');

//延迟转向 也就是隔几秒跳转

header('Refresh: 10; url=http://xxxx/');

//修改 X-Powered-By信息

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

//文档语言

header('Content-language: en');

//设置内容长度

header('Content-Length: 1234');

//告诉浏览器最后一次修改时间

header('Last-Modified: '.gmdate('D, d M Y H:i:s', $time).' GMT');

//告诉浏览器文档内容没有发生改变

header('HTTP/1.1 304 Not Modified');

返回文档类型

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; charset=utf-8'); //css文件

header('Content-type: text/javascript; charset=utf-8'); //js文件

header('Content-type: application/json; charset=utf-8'); //json

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

header('Content-type: text/xml; charset=utf-8'); //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');//读取文件下载

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');

其它返回头

header("Content-Length: $size"); //告诉浏览器数据长度,浏览器接收到此长度数据后就不再接收数据

header("Connection: Close"); //告诉浏览器关闭当前连接,即为短连接