sanitize_filename($filename)

update([$table = ''[, $set = NULL[, $where = NULL[, $limit = NULL]]]])

class CI_FTP connect([$config = array()])

add_row([$args = array()[, ...]])

convert_accented_characters($str)

base_url($uri = '', $protocol = NULL)

clear_data()

where($key[, $value = NULL[, $escape = NULL]])

select_max([$select = ''[, $alias = '']])

class CI_DB_forge add_column($table[, $field = array()[, $_after = NULL]])