List the resources that can be autoloaded in Codeigniter?

The following items can be loaded automatically:

• Classes found in the libraries/ directory
• Helper files found in the helpers/ directory
• Custom config files found in the config/ directory
• Language files found in the system/language/ directory
• Models found in the models/ folder

To autoload resources, open the application/config/autoload.php file and add the item you want loading to the autoload array. You’ll find instructions in that file corresponding to each type of item.