Server-side includes (SSI)

A simple way to include dynamic content in a web page. SSI are written into an HTML document as comments which have special meaning to the server. The server (or a module connected to the server) parses and processes the SSI instructions, and the client receives the resulting HTML document where these special comments have been replaced with dynamic content.

In Apache, SSI are usually handled by mod_include. Common uses for SSI are to display the document's last-modified date or to include a standard header and footer on all pages of a site.

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