| form_set_error | includes/form.inc | File an error against a form element. |
| node_get_types | modules/node/node.module | Builds a list of available node types, and returns all of part of this list
in the specified format. |
| node_invoke | modules/node/node.module | Invoke a node hook. |
| node_invoke_nodeapi | modules/node/node.module | Invoke a hook_nodeapi() operation in all modules. |
| node_last_changed | modules/node/node.module | |
| node_validate | modules/node/node.module | Perform validation checks on the given node. |
| t | includes/common.inc | Translate strings to the page language or a given language. |
| user_access | modules/user/user.module | Determine whether the user has a given privilege. |
| user_load | modules/user/user.module | Fetch a user object. |