It shouldn't be an issue as long as you aren't hard coding the path. What is your directory structure (just an outline is fine) and can you give us a snipped of the code with the include request in it?
I just installed Xampp portable on a flash drive as my test environment and all services works fine. I copied my website folder from my webserver to the htdocs folder of the xampp and now xampp doesn't recognize the paths to the include_once's in the webpages and it says: Fatal error: Call to undefined function checkmobile() in F:\xampp\htdocs\mySite\includes\html_head.php on line 15
ie, there is a include_once checkmobile.php above the line 15 but the xampp doesn't recognize the path! BTW, this works from my webserver...
I am trying to keep the paths the same so when I transfer the website files back to the production server, I don't have to change all the paths again...
Any solution to this? Am I doing something wrong or have to modify some config files in xampp?