利用yahoo汇率接口实现实时汇率转换示例 汇率转换器

function getexchangerate($from_currency,$to_currency)
{
        $amount = urlencode($amount);
        $from_currency = urlencode($from_currency);
        $to_currency = urlencode($to_currency);
        $url = "download.finance.yahoo.com/d/quotes.html?s=".$from_currency.$to_currency."=x&f=sl1d1t1ba&e=.html";
        $ch = curl_init();
        $timeout = 0;
        curl_setopt ($ch, curlopt_url, $url);
        curl_setopt ($ch, curlopt_returntransfer, 1);
        curl_setopt($ch,  curlopt_useragent , "mozilla/4.0 (compatible; msie 8.0; windows nt 6.1)");
          curl_setopt ($ch, curlopt_connecttimeout, $timeout);
        $rawdata = curl_exec($ch);
        curl_close($ch);
        $data = explode(',', $rawdata);
        return $data[1];
}
//调用方法
echo getexchangerate("cny","usd");