/**
Retrieve currency conversion from Google Finance.
@return bool|float
@param $amount float
@param $from string Currency to convert from. e.g. USD
@param $to string Currency to convert to. e.g. EUR
@public
**/
public static function convertAmount($amount, $from, $to, $quiet = false)
{
$from = strtoupper($from);
$to = strtoupper($to);
if (!is_numeric($amount)) {
trigger_error(self::TEXT_AmountNotNumber);
return false;
}
// Workaround for empty ENV. Causes an issue in f3::http()
if (!isset($_ENV['OS'])) {
$_ENV['OS'] = 'Windows';
}
$data = f3::http("GET http://www.google.com/finance/converter", http_build_query(array('a' => $amount, 'from' => $from, 'to' => $to)));
if (preg_match('/<span class=bld>(.+) (.+)<\\/span>/', $data, $match)) {
if ($match[2] == $to) {
return (double) $match[1];
}
}
if (!$quiet) {
trigger_error(self::TEXT_NoConversion);
}
return false;
}
