Comment by epcoa
What does SHTML stand for?
What does SHTML stand for?
This is a legacy of old apache configurations, the common mime type configuration files used .html to send the straight file, and .shtml to turn on the server side processing instructions. Server side includes could be static files or executable scripts that generated text on STDOUT. If you were using a lot of server side includes, it was cleaner just to turn on server side parsing for the whole site.
The classical answer is that the S stands for Server-Side-Incude (SSI). SSI source typically uses the extension .shtml. More info:
https://en.wikipedia.org/wiki/Server_Side_Includes