Getting automatically correct delimiter for platform

Hi

I have difficulties to retrieve automatically the correct path
delimiter for the underlying platform i.e "include_path" uses ";" or
":". because I developing my PHP pages on windows and deploy these
after to unix/linux I am looking for a way that such delimiters can be
on the fly be changed and interpreted automatically.

- Exists there a constant or variable where I can retrive the current
platform name (Windows/Linux...)?
- Exists there already a constant which contains the correct delimiter
value for the underlying platform?

Thanks for your comments and hints

regards
Mark