Server Side Includes


Server Side Includes (SSI) is a simple interpreted server-side scripting language used almost exclusively for the World Wide Web. It is most useful for including the contents of one or more files into a web page on a web server, using its #include directive. This could commonly be a common piece of code throughout a site, such as a page header, a page footer and a navigation menu. SSI also contains control directives for conditional features and directives for calling external programs. It is supported by Apache, LiteSpeed, nginx, IIS as well as W3C's Jigsaw.[1] It has its roots in NCSA HTTPd.[2]

In order for a web server to recognize an SSI-enabled HTML file and therefore carry out these instructions, either the filename should end with a special extension, by default .shtml, .stm, .shtm, or, if the server is configured to allow this, set the execution bit of the file.[3]

  1. ^ "SSI Commands". W3C. Retrieved 24 March 2019.
  2. ^ Cite error: The named reference ncsa-ssi was invoked but never defined (see the help page).
  3. ^ "Configuring your server to permit SSI". Apache Tutorial: Introduction to Server Side Includes. The Apache Software Foundation. Retrieved 24 June 2015.

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