Does PHP have a function to detect the OS it's running on?

Question

I wouldn\'t know under what keyword to look for this in the PHP database, so I\'m asking here.

Reason I want to know is because of how different Operating Systems handle

Answer 1

As far as I know, if PHP is running on Windows, there will be an environment variable named WINDIR. I think that you could do this:

$isWindows = isset($_SERVER['WINDIR']);