camelize($str)

get_csrf_hash()

CodeIgniter has a config file that lets you store your database connection values (username, password, database name, etc.). The config file is located at application/config/database

class CI_DB_query_builder reset_query()

adjust_date($month, $year)

set_error($msg)

count_all([$table = ''])

append_output($output)

log_message($level, $message)

class CI_URI segment($n[, $no_result = NULL])