Util class in PHP (forgotten)

Util.php

<?php
defined('BASEPATH') OR exit('No direct script access allowed');

class Util
{
    public function currencyDecimalConverter($value)
    {
        $number = (float)$value;
        return number_format($number, 2, ",", ".");
    }

    public function currencyConverter($value)
    {
        $number = round((float)$value);
        return number_format($number, null, null, ".");
    }

    public function currencyUpConverter($value)
    {
        $number = ceil((float)$value);
        return number_format($number, null, null, ".");
    }

    public function currencyDownConverter($value)
    {
        $number = floor((float)$value);
        return number_format($number, null, null, ".");
    }
}