header函数运用

header 函数　用于发送原生的 HTTP 头

1 .跳转

header("Location: http://www.example.com/");

２．设置编码

header("Content-type:text/html;charset=utf-8"); 

３.下载等等

<?php// We'll be outputting a PDFheader('Content-type: application/pdf');// It will be called downloaded.pdfheader('Content-Disposition: attachment; filename="downloaded.pdf"');// The PDF source is in original.pdfreadfile('original.pdf');

４　可以设置很多http 头

 header("Cache-Control: no-cache");  header("Pragma: no-cache");