Php解析xml（多个嵌套的xml）。如果一个嵌套的起作用，则多个嵌套的不起作用

Xml是这样的：

<CRates>
    <Date>20010323</Date>
    <Currencies>
        <Currency>
            <ID>AED</ID>
            <Units>1</Units>
            <Rate>0.17200000</Rate>
        </Currency>
        <Currency>
            <ID>ATS</ID>
            <Units>1</Units>
            <Rate>0.04102750</Rate>
        </Currency>
    </Currencies>
</CRates>

$currencies = simplexml_load_file('__joomla.xml');

/**/
$cdate=$currency->Date;
echo "<time>". $date. "</time><br>";

foreach ($currencies as $currency):
    $id=$currency->ID;
    $units=$currency->Units;
    $rate=$currency->Rate;

    echo 
    "
    <div class='id'>". $id. "</div>
    <div class='units'>". $units. "</div>
    <div class='rate'>". $rate. "</div>
    ";
endforeach;

Php是这样的：

<CRates>
    <Date>20010323</Date>
    <Currencies>
        <Currency>
            <ID>AED</ID>
            <Units>1</Units>
            <Rate>0.17200000</Rate>
        </Currency>
        <Currency>
            <ID>ATS</ID>
            <Units>1</Units>
            <Rate>0.04102750</Rate>
        </Currency>
    </Currencies>
</CRates>

$currencies = simplexml_load_file('__joomla.xml');

/**/
$cdate=$currency->Date;
echo "<time>". $date. "</time><br>";

foreach ($currencies as $currency):
    $id=$currency->ID;
    $units=$currency->Units;
    $rate=$currency->Rate;

    echo 
    "
    <div class='id'>". $id. "</div>
    <div class='units'>". $units. "</div>
    <div class='rate'>". $rate. "</div>
    ";
endforeach;

如果移除20010323并移除末端，则所有工作正常

但如果未删除，则不显示任何内容

---

请告知需要更正的内容。

原因是您正在访问美元货币，就像它的根元素一样。您可以使用$xmlDoc->currencies加载文件和引用货币，它应该可以工作。请尝试以下操作：

$xmlDoc = simplexml_load_file('__joomla.xml');
/**/
$cdate=$xmlDoc->Date;
echo "<time>". $cdate. "</time><br>";

foreach ($xmlDoc->Currencies->Currency as $currency):
  $id=$currency->ID;
  $units=$currency->Units;
  $rate=$currency->Rate;

  echo 
  "
  <div class='id'>". $id. "</div>
  <div class='units'>". $units. "</div>
  <div class='rate'>". $rate. "</div>
  ";
endforeach;

更新：将$xmlDoc->Currency更新为$xmlDoc->Currency->Currency，因为我们希望循环遍历货币的子项

试试这个：

$currencies = simplexml_load_file('__joomla.xml');

/**/
$cdate = $currencies->Date;
echo "<time>". $date. "</time><br>";

foreach ($currencies->CRates->Currencies->Currency as $currency):
$id    = $currency->ID;
$units = $currency->Units;
$rate  = $currency->Rate;

echo 
"
<div class='id'>". $id. "</div>
<div class='units'>". $units. "</div>
<div class='rate'>". $rate. "</div>
";
endforeach;

您需要使用->子节点来迭代货币的子节点

---

这很好：-

$xml='<CRates>
<Date>20010323</Date>

<Currencies>

<Currency>
<ID>AED</ID>
<Units>1</Units>
<Rate>0.17200000</Rate>
</Currency>

<Currency>
<ID>ATS</ID>
<Units>1</Units>
<Rate>0.04102750</Rate>
</Currency>

</Currencies>
</CRates>';
$xml1 = simplexml_load_string($xml);
//$xml hold the object iterate through as per requirement
echo '<pre>';
var_dump($xml1);

---

CRates是根节点，所以你的foreach会失败。你不需要使用子方法，@vinodadhikary更干净更简单。是的，@vinodadhikary方法稍微短一点，少一个变量，但是foreach语句中缺少->Currency，直到现在我才明白。抱歉，无法开始工作。我只是用答案中的代码替换了我的代码。。。工作表不需要foreach$xmlDoc->currences as$currency:若要更改为foreach$xmlDoc->currences->currences as$currency:@user2465936，您是对的，它应该是$xmlDoc->currences currency->currency，因为我们要循环使用currency。我已经更新了我的答案，谢谢。