Server Side Includes
Server-Side Includes (also referred to as SSI or SHTML) allow you to embed programming code into your web page that the server will process before sending the page to the user. Put simply, SSI is sort of like using your HTML server as a cut and paste editor. It allows you to add such things as a clock or embedded counter into your website. There are thousands of possbilites for SSI on your website.

It's an easy way to add advanced features to your website, without having to write complete CGI programs. If you are interested in learning more click here

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