Currently on my site I\'m using statements like:
include \'head.php\';
include \'../head.php\';
include \'../../head.php\';
depending on how ma
If you can't edit the php.ini file itself, you could add
set_include_path(get_include_path() . PATH_SEPARATOR . $path_to_add);
before your include statements.
However if you find yourself having include or require troubles, it is probably a code smell. The best solution would be a good object-oriented design with a good __autoload function.