class exchange_rates {

    public function curl($url) {
        $ch = curl_init($url);
        curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
        curl_setopt ($ch, CURLOPT_COOKIEJAR, dirname(__FILE__).'/cookie.txt');
        curl_setopt ($ch, CURLOPT_COOKIEFILE,  dirname(__FILE__).'/cookie.txt');
        curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, 60);
        curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt ($ch, CURLOPT_HEADER, 1);
        curl_setopt ($ch, CURLOPT_ENCODING, 'utf-8');
        curl_setopt ($ch, CURLOPT_SSL_VERIFYPEER, 0);
        curl_setopt ($ch, CURLOPT_SSL_VERIFYHOST, 0);
        curl_setopt ($ch, CURLOPT_HTTPHEADER, array(

        ));
        $result = curl_exec($ch);
        curl_close($ch);
        $this->result = $result;
        return $result;
    }

    public function parse_money($curl) {
        $pattern = "/(?:<td><big>)(.*?)(?:<\/big>)/";
        preg_match_all($pattern, $curl, $matches);
        return $matches;
    }

}
$rates = new exchange_rates();
$curl = $rates->curl('http://finance.i.ua/');
$matches = $rates->parse_money($curl);
preg_match_all($pattern, $curl, $matches);
echo 'Покупка: USD=' . $matches[1][0] . '; EU=' . $matches[1][3];
echo '; RUB=' . $matches[1][6] . "\n";
echo 'Продажа: USD=' . $matches[1][1] . '; EU=' . $matches[1][4];
echo '; RUB=' . $matches[1][7] . "\n";