If you have just started to learn PHP, there may be many functions need to study, today we will learn how to use the PHP Header (), more instructions, please refer to the PHP Chinese manual, the following is a detailed use of the header function
The cache of the Web page is controlled by the "Cache-control" in the HTTP message header, and the common values are private, No-cache, Max-age, must-revalidate, etc., and the default is private. Its function is divided into the following situations
The Host header is a bound domain name, Host header is not required if no domain name exists
The so-called host header is called from the function of binding domain names in IIS. Generally, port 80 of an IP address on a Web server can only
PHP uses the header method to download files,
First, we will introduce the PHP header () function.
Definition and usage
The header () function sends the original HTTP header to the client.
It is important to realize that the header () function must
The PHP header function sets an example of an HTTP message header,
Define the encoding header (' Content-type:text/html;charset=utf-8 ');Atomheader (' Content-type:application/atom+xml ');Cssheader (' Content-type:text/css ');Javascriptheader ('
How to automatically add BOM header and explain BOM header and get rid of BOM header when PHP download file,
PHP download files automatically add BOM header, first of all to find out, what is the BOM header? When you save a text file in UTF-8
This article mainly introduces PHP use header way to achieve file download function, very good, with reference value, the need for friends can refer to the next
Let me introduce you to the PHP header () function
Definition and usage
The header ()
6.1HTTP message Header1. HTTP protocol request and Response messages must contain HTTP headerThe HTTP header must be included in the request and response messages of the Protocol, and the first content is the information provided by the client and
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