Please read the upgrade notes corresponding to the version you are upgrading from. Upgrading from 3.0.6 to 3.1.0

where_not_in([$key = NULL[, $values = NULL[, $escape = NULL]]])

num_fields()

modify_column($table, $field)

row([$n = 0[, $type = 'object']])

load($langfile[, $idiom = ''[, $return = FALSE[, $add_suffix = TRUE[, $alt_path = '']]]])

trans_complete()

valid_ip($ip[, $which = ''])

start_cache()

get_flash_keys()