The issue like this: b.inc is included into a.shtml file, then a.shtml is included into file main.php. but when run main.php file, we only get the contents of the file "a.shtml". I used this syntax:
<!--#include virtual="/include/a.shtml"-->
or: <?php include("include/a.shtml"); ?>
the results are same. any idea for this kind of nested include? thanks.