hex2bin($data)

get($id)

trans_off()

As well as calling an applications Controllers via the URL in a browser

rsegment_array()

limit($value[, $offset = 0])

ruri_to_assoc([$n = 3[, $default = array()]])

By default it is assumed that you only intend to use CodeIgniter to manage one application, which you will build in your application/ directory. It is possible, however

Drivers are a special type of Library that has a parent class and any number of potential child classes. Child classes have access to the parent class, but not their siblings

db_select([$database = ''])