| arg | includes/path.inc | Return a component of the current Drupal path. |
| block_admin_display | modules/block/block.module | Generate main block administration form. |
| check_plain | includes/bootstrap.inc | Encode special characters in a plain-text string for display as HTML. |
| drupal_add_css | includes/common.inc | Adds a CSS file to the stylesheet queue. |
| drupal_get_path | includes/common.inc | Returns the path to a system item (module, theme, etc.). |
| init_theme | includes/theme.inc | Initialize the theme system by loading the theme. |
| l | includes/common.inc | Format an internal Drupal link. |
| module_exists | includes/module.inc | Determine whether a given module exists. |
| system_default_region | modules/system/system.module | Get the name of the default region for a given theme. |
| system_region_list | modules/system/system.module | Get a list of available regions from a specified theme. |
| t | includes/common.inc | Translate strings to the current locale. |
| url | includes/common.inc | Generate a URL from a Drupal menu path. Will also pass-through existing URLs. |
| variable_get | includes/bootstrap.inc | Return a persistent variable. |
| _block_rehash | modules/block/block.module | Update the 'blocks' DB table with the blocks currently exported by modules. |
