在PHP中使用SimpleXML根据其同胞的值选择文本节点 - Selecting text node based on value of it's sibling in PHP using SimpleXML

Selecting text node based on value of it's sibling in PHP using SimpleXML

本文关键字：选择节点文本 PHP SimpleXML | 更新日期: 2023-09-27

我有一个格式类似的XML:

<users>
  <user>
    <name>Mac</name>
    <category>4</category>
  </user>
  <user>
   <name>Simon</name>
    <category>3</category>
  </user>
  <user>
    <name>Jim</name>
    <category>4</category>
  </user>
</users>

我想做的是通过特定类别中的用户进行交互并返回他们的名称。我一直在使用simplexml做一些工作，但我一直无法弄清楚如何根据它的兄弟姐妹中的文本选择元素节点。

foreach ($users->user as $user) {
echo (string)$user->name; 
}

提前感谢

使用Xpath:

$users = simplexml_load_string($xml);
foreach($users->xpath('//user[category = 4]') as $user) {
  echo (string) $user->name, "'n";
}

输出:

Mac
Jim

btw这就是DOM的样子:

$xpath = new DOMXpath(DOMDocument::loadXml($xml));
foreach ($xpath->evaluate('//user[category = 4]') as $user) {
  echo $xpath->evaluate('string(name)', $user), "'n";
}