比$ DOMDocument-> getNodePath（）更具体的路径;

Question

I currently need a an XPath path to an element. The path must contain an attribute that uniquely identifies each element along the path (In this case, the name attribute).

$DOMDocument->getNodePath(); returns the path, but no attributes. The attributes are neccessary as the XML will be changing quite a bit.

I am currently writing a method to manually go through and check each element in the path for the name attribute, then inserting it into the string at the appropriate point. Is there an easier/faster/not as hackish way of doing this?

Answer 1

The xsh solution from @choroba can be translated to PHP source using DOMXpath::evaluate():

$document = new DOMDocument();
$document->loadXml($xml);
$xpath = new DOMXpath($document);

foreach ($xpath->evaluate('//address') as $address) {
  $path = '';  
  foreach ($xpath->evaluate('ancestor-or-self::*', $address) as $ancestor) {
    $path .= '/'.$ancestor->nodeName;
    if ($name = $ancestor->getAttribute('name')) {
      $path .= '[@name = "'.$name.'"]';
    }
  }
  var_dump($path);
}

ancestor-or-self::* is an Xpath expression that fetches all element nodes starting from the context node up to the document element.