I thought that in Windows both forward and backslashes work, whilst on UNIX machines only forwardslashes? Well, it seems as though forwardslashes aren't working on my Win machine with the following:

<?require( '/data/php/templates/devshed/category.php3');

Not finding category.php3, but using backslashes instead does find the file (I'm trying to learn PHP here through DevShed's PHP source code).

Can any give any advice here...possibly something to do with php.ini?