General utility variables:
  • $base_path: The base URL path of the Drupal installation. At the very least, this will always default to /.
  • $css: An array of CSS files for the current page.
  • $directory: The directory the theme is located in, e.g. themes/garland or themes/garland/minelli.
  • $is_front: TRUE if the current page is the front page.
  • $logged_in: TRUE if the user is registered and signed in.
  • $is_admin: TRUE if the user has permission to access administration pages.
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