Helpers, as the name suggests, help you with tasks. Each helper file is simply a collection of functions in a particular category. There are URL Helpers, that

Table MetaData These functions let you fetch table information. List the Tables in Your Database

update_string($table, $data, $where)

set_status_header($code[, $text = ''])

In order to help out, CodeIgniter uses a series of function, method, class and variable names in its operation. Because of this, some names cannot be used by a developer. Following

keep_flashdata($key)

clean()

ol($list, $attributes = '')

send_success()

contents([$newest_first = FALSE])