> I've a bunch of small sites whose links end in ".php" despite they no longer run on PHP.
Kudos for maintaining that compatibility, but it seems that this kind of thing is addressed in the linked document:
> File name extension. This is a very common one. "cgi", even ".html" is something which will change. You may not be using HTML for that page in 20 years time, but you might want today's links to it to still be valid. The canonical way of making links to the W3C site doesn't use the extension.
I'm not sure if they still use it but a site I redid for a company many moons ago in Perl had Apache set to treat .htm files as CGI scripts so we didn't have to change the previous, static site's URL's.
The original site ran on IIS and was old enough that MS software at the time still used three letter extensions for backwards compatibility, around 1997-1998 IIRC.
Kudos for maintaining that compatibility, but it seems that this kind of thing is addressed in the linked document:
> File name extension. This is a very common one. "cgi", even ".html" is something which will change. You may not be using HTML for that page in 20 years time, but you might want today's links to it to still be valid. The canonical way of making links to the W3C site doesn't use the extension.