How to set common content-type values for header in php

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In PHP, you can send header information through the header function, and you can also set the content-type of the file. Here are some content-type values for common file types.

/ / date 2015-06-22 Content-Type:text/html;charset=utf-8 / define the code header ('Content-Type:text/html;charset=utf-8'); / / Atomheader ('Content-type: application/atom+xml'); / / CSSheader (' Content-type: text/css'); / / Javascriptheader ('Content-type: text/javascript'); / / JPEG Imageheader (' Content-type: image/jpeg'); / / JSONheader ('Content-type: application/json'); / / PDFheader (' Content-type: application/pdf') / / RSSheader ('Content-Type: application/rss+xml; charset=ISO-8859-1'); / / Text (Plain) header ('Content-type: text/plain'); / / XMLheader (' Content-type: text/xml'); / / okheader ('HTTP/1.1 OK'); / / set a 404 header: header (' HTTP/1.1 404 Not Found'); / / set the address to be permanently redirected header ('HTTP/1.1 301 Moved Permanently') / / go to a new address header ('Location: http://www.example.org/'); / / File delay redirection: header (' Refresh: 10; url= http://www.example.org/');print 'You will be redirected in 10 seconds'; / / of course, you can also use HTML syntax to implement / /