Question

我正在尝试从ECB货币XML对象中提取交换值。可以在这里 http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml

我可以毫无问题地加载对象，print_r会显示所有数据。但是，我无法从此对象获取特定数据。

$xml_url = "http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml";

if (($response_xml_data = file_get_contents($xml_url))===false){
    echo "Error fetching XML\n";
} else {
   libxml_use_internal_errors(true);
   $data = simplexml_load_string($response_xml_data);
   if (!$data) {
       echo "Error loading XML\n";
       foreach(libxml_get_errors() as $error) {
           echo "\t", $error->message;
       }
   } else {
        echo 'type is: '.gettype($data).'<br>';
        echo $data->propertyArray;
        //echo $data->asXML();
        print_r($data);

    }
}

这是print_r的输出

SimpleXMLElement对象（[Cube] =＆gt; SimpleXMLElement对象（[Cube] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[时间] =＆gt; 2018-03-09）[立方体] =＆gt ; Array（[0] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; USD [rate] =＆gt; 1.2291））[1] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; JPY [费率] =＆gt; 131.31））[2] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; BGN [费率] = ＆gt; 1.9558））[3] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; CZK [费率] =＆gt; 25.454））[4] =＆gt; SimpleXMLElement对象（[@ attributes] =＆gt;数组（[货币] =＆gt; DKK [费率] =＆gt; 7.4494））[5] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt;英镑[费率] ] =＆gt; 0.88893））[6] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; HUF [费率] =＆gt; 311.93））[7] =＆gt; SimpleXMLElement对象（ [@attributes] =＆gt ;数组（[货币] =＆gt; PLN [费率] =＆gt; 4.2018））[8] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; RON [rate] =＆gt; 4.6570））[9] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; SEK [rate] =＆gt; 10.1648））[10] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; CHF [rate] =＆gt; 1.1695））[11] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; ISK [rate] =＆gt; 122.90））[12] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; NOK [rate] =＆gt; 9.5948））[13] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; HRK [费率] =＆gt; 7.4355））[14] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; RUB [rate] =＆gt; 70.1112））[15] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; TRY [rate] =＆gt; 4.6939））[16] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; AUD [rate] =＆gt; 1.5772））[17] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; BRL [费率] =＆gt; 4.0100））[18] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; CAD [rate] =＆gt; 1.5848））[19] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; CNY [费率] =＆gt; 7.7895））[20] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; HKD [rate] =＆gt; 9.6370））[21] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; IDR [rate] =＆gt; 16976.78））[22] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; ILS [rate] =＆gt; 4.2345））[23] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; INR [rate] =＆gt; 80.1315））[24] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; KRW [rate] =＆gt; 1315.51））[25] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; MXN [费率] =＆gt; 22.8810））[26] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; MYR [费率] =＆gt; 4.8105））[27] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; NZD [rate] =＆gt; 1.6931））[28] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; PHP [rate] =＆gt; 64.102））[29] =＆gt; SimpleXMLElement Object（[@attributes] =＆gt; Array（[currency] =＆gt; SGD [rate] =＆gt; 1.6204））[30] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; THB [费率] =＆gt; 38.538））[31] =＆gt; SimpleXMLElement对象（[@attributes] =＆gt;数组（[货币] =＆gt; ZAR [费率] =＆gt; 14.6257））））））

如何从美元获得汇率的价值？看完这个帖子后 How can I access an array/object? 我仍然不知道如何访问数据。

echo $data->propertyArray;

不会返回任何内容。

Answer 1

您可以迭代对象并检查每种类型的货币。

$xml_url = "http://www.ecb.europa.eu/stats/eurofxref/eurofxref-daily.xml";
if (($response_xml_data = file_get_contents($xml_url))===false){
    echo "Error fetching XML\n";
} else {
    libxml_use_internal_errors(true);
    $data = simplexml_load_string($response_xml_data);
    if (!$data) {
        echo "Error loading XML\n";
        foreach(libxml_get_errors() as $error) {
            echo "\t", $error->message;
        }
    } else {
        foreach($data->Cube->Cube->Cube as $currency) {
            if($currency['currency'] == 'USD') {
                echo $currency['rate'];
            }
        }
    }
}

从ECB货币XML对象

1 个答案: