Question

任何人都可以帮我阅读大文件吗？我正在阅读项目：

    $xmlReader = new XMLReader();
    $xmlReader->open($path);

    while ($xmlReader->read() && $xmlReader->name !== 'item') ;

    while ($xmlReader->name == 'item')
    {
      $node = new SimpleXMLElement($xmlReader->readOuterXML());
      foreach($node->properties as $property)
      {
        var_dump($property->price); //empty class SimpleXMLElement
        var_dump($property->attributes()); //empty class SimpleXMLElement
      }

      $xmlReader->next('item');
    }

    $xmlReader->close();

所以我无法阅读 $ property-＆gt;价格，因为我收到空类SimpleXMLElement

属性 sku 的情况相同我也收到空类SimpleXMLElement

我无法转换为（string），因为我收到空字符串。

如何阅读子节点？源XML：

<items>
            <item>
                <code>be274178-9039-11e6-86d0-001e6727034e</code>
                <delete>0</delete>
                <title>Полотенцесушитель М-обр. 500*500 нар. р. 1" арт.00004-5050</title>
                <category>13760cb9-8f7b-11e6-86d0-001e6727034e</category>
                <producer>5a457cfd-b088-11e2-9c54-001e6727034e</producer>
                <properties>
                    <property sku="40 451">
                        <price>2831.00</price>
                        <characteristics>
                            <characteristic>
                                <title>Свойство</title>
                                <value>накопление</value>
                                <filter>0</filter>
                                <visible>0</visible>
                            </characteristic>
                            <characteristic>
                                <title>Форма</title>
                                <value>М-образный</value>
                                <filter>1</filter>
                                <visible>1</visible>
                            </characteristic>

                        </characteristics>
                    </property>
                    <property sku="40 464">
                        <price>3442.00</price>
                        <characteristics>
                            <characteristic>
                                <title>Свойство</title>
                                <value>накопление</value>
                                <filter>0</filter>
                                <visible>0</visible>
                            </characteristic>
                        </characteristics>
                    </property>

                </properties>

            </item>
        </items>

Answer 1

应该是

foreach($node->properties->property as $property)

因为它只有一个<properties>个元素，但很多<property>元素。

请参阅PHP手册中的Example #4 Accessing non-unique elements in SimpleXML：

当元素的多个实例作为单个父元素的子元素存在时，将应用常规迭代技术。

<?php
include 'example.php';

$movies = new SimpleXMLElement($xmlstr);

/* For each <character> node, we echo a separate <name>. */
foreach ($movies->movie->characters->character as $character) {
   echo $character->name, ' played by ', $character->actor, PHP_EOL;
}

?>

如何读取SimpleXML的大型XML节点

1 个答案: