Currency Conversion using PHP [closed]

Answer 1

My 2017 solution is a very lightweight function that gets the current exchange informations from the fixer.io API. It also stores the exchange rate in a daily cookie to prevent further heavy web loading time. You can also choose Sessions for that or remove it:

function convertCurrency($amount, $from = 'EUR', $to = 'USD'){
    if (empty($_COOKIE['exchange_rate'])) {
        $Cookie = new Cookie($_COOKIE);
        $curl = file_get_contents_curl('http://api.fixer.io/latest?symbols='.$from.','.$to.'');
        $rate = $curl['rates'][$to];
        $Cookie->exchange_rate = $rate;
    } else {
        $rate = $_COOKIE['exchange_rate'];
    }
    $output = round($amount * $rate);

    return $output;
}

Example usage to convert 100 euro to pounds:

echo convertCurrency(100, 'EUR', 'GBP');