PHP: How to get currency value from Yahoo

Here is a php function that can be used to get current currency values from Yahoo.

<?php function get_currency_value($from, $to) {
    $url = "http://finance.yahoo.com/d/quotes.csv?f=l1&s=$from$to=X";
    $handle = fopen($url, 'r');
    if ($handle) {
        $result = fgetcsv($handle);
        fclose($handle);
        $rate = $result[0];
        return $rate;
    }
}

echo 'R'.get_currency_value('USD', 'ZAR'); ?>

The method, as I used it, will return 1 USD in ZAR.
Here is the results on the date of testing: R7.8791

This function may be useful for someone out there.