<?phpheader(\'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(\'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\'); //声明输出的是二进制字节流
header(\'Accept-Ranges:bytes\');//声明浏览器返回大小是按字节进行计算
header(\'Content-Disposition: attachment; filename="ITblog.zip"\');
//声明作为附件处理和下载后文件的名称//告诉浏览器文件的总大小
//告诉浏览器文件的总大小
$fileSize = filesize($filePath);//坑 filesize 如果超过2G 低版本php会返回负数
header(\'Content-Length:\' . $fileSize); //注意是\'Content-Length:\' 非Accept-Length
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\')