使用PHP获取特定的XML元素值

I have an XML structure like this

<companies>
   <company>
      <vatno>12345678</vatno>
      <name>
         <founded>2013-12-31</founded>
         <text>XYZ Inc</text>
      </name>
      <location>
         <streetname>West Road</streetname>
         <county>
            <no>12345</no>
            <text>East County</text>
         <county>
      </location>
   </company>
</companies>

I am trying to get specific info from the elements into PHP variables.

To get "vatno" I use:

$vatno = $xmlObject->item($i)->getElementsByTagName('vatno')->item(0)->childNodes->item(0)->nodeValue;

But what if I need the county name for example?

I cannot use getElementsByTagName('text') as it would get the company name also using the element name "text".

You may be better off using SimpleXML, you can then access the various components in a more intuitive way. The example above would be something like...

$data = <<< XML
<companies>
   <company>
      <vatno>12345678</vatno>
      <name>
         <founded>2013-12-31</founded>
         <text>XYZ Inc</text>
      </name>
      <location>
         <streetname>West Road</streetname>
         <county>
            <no>12345</no>
            <text>East County</text>
         </county>
      </location>
   </company>
</companies>
XML;

$xml = simplexml_load_string($data);
foreach ( $xml->company as $company )   {
    echo $company->vatno.PHP_EOL;
    echo $company->location->county->text.PHP_EOL;
}

So each sub element is accessed using ->.

If you wanted to stick with what you already had, you should be able to use...

$countyName = $xmlObject->item($i)->getElementsByTagName('text')->item(1)
->nodeValue;

Using item(1) will fetch the second instance of the <text> elements, so this assumes that the name will have this value as well.

It works with SimpleXML if I use

$xml = simplexml_load_string($data);
foreach ( $xml->companies->company as $company )   {
    echo $company->vatno.PHP_EOL;
    echo $company->location->county->text.PHP_EOL;
}