使用Google和CURL php进行货币转换

时间:2014-11-23 07:17:42

标签: php curl

我正在尝试使用Google API和PHP curl转换货币数据。不幸的是我有以下问题,我仍然无法解决它。任何人都可以帮助我。 这是我的PHP函数。

function currency($from_Currency,$to_Currency,$amount) {
    $amount = urlencode($amount);
    $from_Currency = urlencode($from_Currency);
    $to_Currency = urlencode($to_Currency);
    $url = "http://www.google.com/ig/calculator?hl=en&q=$amount$from_Currency=?$to_Currency";
    $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);
    $data = explode(' ', $data['3']);
    $var = $data['0'];
    return round($var,2);
}

//这是我的函数调用

$usd= currency("USD","ETB",1);
echo "270 USD= ".$usd."ETB";

但我有以下错误

注意:未定义的偏移量:3 ...在线....(此功能的14个)

2 个答案:

答案 0 :(得分:1)

您的API网址似乎有误,因为当$rawdata回显时,Google会返回错误404.目前,可用的解决方案(如果您坚持使用Google)是使用Google转换货币金融。例如,使用GET请求,您可以使用以下格式发送请求:

$url = "https://www.google.com/finance/converter?a=" . $amount . "&from=" . $from . "&to=" . $to;

不幸的是,Google会返回整页HTML,因此您需要手动解析结果。我刚刚尝试使用https://www.google.com/finance/converter?a=1&from=IDR&to=USD访问它,转换结果附加在<div>中,如下所示:

<div id=currency_converter_result>1 IDR = <span class=bld>0.0001 USD</span>

因此,如果将结果保存在$rawdata变量中,则可以在PHP中使用正则表达式来获取转换结果。由于它不是正式的API,因此如果代码无效,您需要在下次主动查看页面结构。

这是您的代码,使用测试更新:

function convertCurrency($amount, $from_Currency, $to_Currency) {
    $url = "https://www.google.com/finance/converter?a=" . $amount . "&from=" . $from_Currency . "&to=" . $to_Currency;
    $ch = curl_init();
    $timeout = 0;

    curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);

    $rawdata = curl_exec($ch);

    curl_close($ch);

    preg_match("/<span class=bld>(.*)<\/span>/", $rawdata,  $converted);
    $converted = preg_replace("/[^0-9.]/", "", $converted);

    return round($converted[0], 3);
}

$usd = currency("USD", "ETB", 270);
echo "270 USD = " . $usd . " ETB";

我的建议是:找另一种货币转换API。您可以查找https://openexchangerates.org/之类的替代方案。不幸的是,它是一项付费服务​​。

答案 1 :(得分:0)

Google已将其网址更改为

   https://www.google.com/finance/converter?a

试试这个

    function currency($from_Currency,$to_Currency,$amount) {
            $amount = urlencode($amount);
            $from_Currency = urlencode($from_Currency);
            $to_Currency = urlencode($to_Currency);
            $get = file_get_contents("https://www.google.com/finance/converter?a=$amount&from=$from_Currency&to=$to_Currency");
            $get = explode("<span class=bld>",$get);
            $get = explode("</span>",$get[1]);  
            $converted_amount = preg_replace("/[^0-9\.]/", null, $get[0]);
             return round($converted_amount,2);

             }

     echo currency("USD","INR",2);