使用 PHP 循环遍历 XML

Question

我正在尝试循环通过从 API 调用获得的 XML 输出。 XML 的结构如下所示：

<prestashop xmlns:xlink="http://www.w3.org/1999/xlink">
 <products>
  <product>
   <id>97</id>
   <id_manufacturer>0</id_manufacturer>
   <id_supplier>0</id_supplier>
   <width>0.000000</width>
   <height>0.000000</height>
   <depth>0.000000</depth>
   <weight>1.127272</weight>
   <quantity_discount>0</quantity_discount>
   <on_sale>0</on_sale>
   <online_only>0</online_only>
   <minimal_quantity>1</minimal_quantity>
   <price>37.000000</price>
  </product>
  <product>...</product>
  <product>...</product>
  <product>...</product>
  <product>...</product>
 </products>
</prestashop>

我想循环浏览所有产品并获取例如价格。 我已经尝试过不同的方法，例如：

 $opt = array(
       'resource' => 'products',
       'display'  => 'full',
       'filter[id]' => $_GET['id'],
       'postXml' => 'asXML'
    );

    $xml = $webService->get($opt); // getting the xml data as shown above
    

foreach ($xml->products->product as $p) {
    echo $p->attributes()->price;
}

但结果不会显示任何内容... 如果您能帮助我并可能有解决方案，我会很高兴。

Answer 1

price 不是<product> 的属性，它是一个子节点。因此，例如，如果您想提取价格（即price 元素的字符串值），您可以执行以下操作：

$dom = new DOMDocument();
$dom->loadXML($xml);
$xpath = new DOMXPath($dom);

$products = $xpath->query("//product");
foreach ($products as $prod)
{   
   foreach ($xpath->query('.//price',$prod) as $price) {
        echo ($price->textContent)."\n";
 
}
};

Answer 2

上一个答案是正确的，但实际上并没有显示如何循环遍历 XML 对象。

<?php
$myXMLData = '<prestashop>
    <products>
        <product>
            <id>97</id>
            <id_manufacturer>0</id_manufacturer>
            <id_supplier>0</id_supplier>
            <width>0.000000</width>
            <height>0.000000</height>
            <depth>0.000000</depth>
            <weight>1.127272</weight>
            <quantity_discount>0</quantity_discount>
            <on_sale>0</on_sale>
            <online_only>0</online_only>
            <minimal_quantity>1</minimal_quantity>
            <price>37.000000</price>
        </product>
        <product>
            <id>98</id>
            <id_manufacturer>0</id_manufacturer>
            <id_supplier>0</id_supplier>
            <width>0.000000</width>
            <height>0.000000</height>
            <depth>0.000000</depth>
            <weight>1.127272</weight>
            <quantity_discount>0</quantity_discount>
            <on_sale>0</on_sale>
            <online_only>0</online_only>
            <minimal_quantity>1</minimal_quantity>
            <price>37.000000</price>
        </product>
    </products>
</prestashop>';

$xml = simplexml_load_string($myXMLData) or die("Error: Cannot create object");
foreach ($xml->products->product as $product){
    print_r($product->id);
    /*You can access all of your product object properties here.*/
}
?>