Our goal for CodeIgniter is maximum performance, capability, and flexibility in the smallest, lightest possible package. To meet this goal we

class CI_User_agent is_browser([$key = NULL])

singular($str)

encrypt($data[, $params = NULL])

get_clickable_smileys($image_url[, $alias = ''[, $smileys = NULL]])

enable_profiler([$val = TRUE])

model($model[, $name = ''[, $db_conn = FALSE]])

set_output($output)

create_key($length)

group_by($by[, $escape = NULL])