Can you use includes with magic constants and get a path which works in Windows

[HGeneAnthony]

Sorry about the question I'm having a hard time explaining it in the allotted subject space.  I'm developing on Windows.  However, my server might be Linux, BSD, Windows, etc.  The problem is when I try to include a file I use magic constants like __DIR__, which returns D:\xampp\htdocs\ etc.  However, the rest of my path I use forward slashes so the path comes out like D:\xampp\htdocs\phptest/index.php.  I don't want to use back slashes since I plan to run this on other OSes and I don't want to have to change all includes back and forth.  Is there an apache setting which will always use forward slashes or a method you use to get around this issue?

[PFMaBiSmAd]

Php internally converts any / to \ before it passes file paths to Windows. There is no need for you to use anything other than / in your code.