<?php

class Currency {
    public static function getRates() {
        // TODO: use cached file if it newer than once a day. Else ask API for new data.
        $url            = 'https://www.cbr-xml-daily.ru/daily_json.js';
        $currenciesJson = json_decode( file_get_contents( $url ) );

        return $currenciesJson->Valute;
    }
}