Get currency rates from floatrates API

get_currencies.php

<?php
 public static $currencies = false;

    public static function getCurrenciesJson()
    {
        if (!self::$currencies) {
            $json = json_decode(system::GET('http://www.floatrates.com/daily/rub.json'), true);
            self::$currencies = !empty($json) ? $json : false;
        }
        return self::$currencies;
    }