byte_format($num[, $precision = 1])

rsegment($n[, $no_result = NULL])

rotate()

error_array()

archive($filepath)

flush_cache()

browser()

mb_substr($str, $start[, $length = NULL[, $encoding = NULL]])

Note: This tutorial assumes you’ve downloaded CodeIgniter and

insert([$table = ''[, $set = NULL[, $escape = NULL]]])