When using the built-in PHP server I can't fall back on PHP when calling a non-existent static (css) file. What I want is that, if I request a css file, and it isn't there, that it is generated on the fly.
But the built-in PHP server simply returns a 404. Other webservers do fall back to PHP so there the css file is generated as expected.
How can I set up my script works as I want in the built-in PHP server as well?