Comment by amazing_stories

Upvote for Apache Server Side Includes. Two years ago I was tasked with redesigning an important informational website that never got the proper attention because all devs were occupied with maintaining the different web application stacks. I wanted something future-proof that an intern could update, basically straight HTML and minimal CSS. I replaced anything that would normally use PHP (and in some cases JavaScript) with stuff built in to Apache. It's cool that Apache also supports conditionals.