如何在使用谷歌货币 API 和 php 时仅获取结果值

Question

我使用的是"新"谷歌货币计算器，而不是先例版本，现在我们有一个带有下拉菜单的表单。等等，我需要的只是获取结果值。

这是我的简单php函数：

    // GOOGLE CURRENCY CONVERTER API
function converter_currency($amount, $from){
    $result = file_get_contents('https://www.google.com/finance/converter?a='.$amount.'&from='.$from.'&to=USD');
    print_r ($result);
    // echo gettype($result); <== said that it's a string
}
  converter_currency(5, 'EUR'); //converts 5euros to USD

这将返回一个表单..结果为：5 EUR = 5.4050 USD如何只获得 ： 5.4050 ？

谢谢。

Answer 1

function converter_currency($amount, $from, $to="USD"){
    $result = file_get_contents('https://www.google.com/finance/converter?a='.$amount.'&from='.$from.'&to='.$to);
    if($doc = @DomDocument::loadhtml($result)){
        if($xpath=new DomXpath($doc)){
            if($node = $xpath->query("//span")->item(0)){
                $result = $node->nodeValue;
                if($pos = strpos($result," ")){
                    return substr($result,0,$pos);
                }
            }
        }
    }
    return "Error occured";
}

Answer 2

function converter_currency($amount, $from){
    $result = file_get_contents('https://www.google.com/finance/converter?a='.$amount.'&from='.$from.'&to=USD');
    preg_match('#<span class=bld>(.+?)</span>#s', $result, $finalData);
    return $finalData[1];
}
echo converter_currency(5, 'EUR'); // 5.4125 USD
list($amount, $currency) = explode(' ', converter_currency(5, 'EUR'));
var_dump($amount, $currency); // string(6) "5.4125" string(3) "USD"