Programmatically access currency exchange rates [closed]

Answer 1

Here is a Soap service that offers exchange rate

http://www.newyorkfed.org/markets/pilotfx.html

Answer 2

XE.com provides feed for their exchange rates. Not free though.

Answer 3

iGoogle was retired on November 1, 2013. This API no longer works.

To get the exchange rate you can use something like this:

function get_exchange_rate($from, $to){
    $data = file_get_contents("http://www.google.com/ig/calculator?hl=en&q=1{$from}=?{$to}");
    preg_match('/rhs\:\s?"([0-9\.]+)/', $data, $m);
    return $m[1];
}

You could add a DB cache in there to make sure you don't get throttled etc.

As has been noted on other posts / comments you'd then use this rate to calculate your currencies