我有一个带有特殊标签的xml rss，我不知道如何阅读第二部分，在这种情况下是子类别
XML RSS:
<?xml version="1.0" encoding="UTF-8"?>
<channel>
<category text="Category">
<category text="Subcategory"/>
</category>
</channel>
</rss>
PHP
//this gives the category
$category = $feed->channel->category->attributes();
echo $category . '<br>';
//I tried this but only gives category and I need subcategory too
foreach ($feed->channel->category->attributes() as $item) {
echo $item . '<br>';
}
这是因为您有两个类别元素，而不是两个属性；并且一个类别元素是另一类别元素的嵌套元素
foreach ($feed->channel->category as $category) {
foreach($category->attributes() as $attribute) {
echo $attribute . '<br>';
}
foreach ($category->category as $subcategory) {
foreach($subcategory->attributes() as $attribute) {
echo $attribute . '<br>';
}
}
}
编辑
如果您的代码段语法正确，和正确缩进，则可能更容易理解
<?xml version="1.0" encoding="UTF-8"?>
<rss>
<channel>
<category text="Category">
<category text="Subcategory"/>
</category>
</channel>
</rss>
因此，category元素可以有"子"元素，也称为category