How to Debug seemingly empty DOM objects?

Question

I am writing a task to import a XML. Debugging is a pain as both var_dump and print_r return seemingly empty objects for DOM objects like DOMElement and DOMNodeList list, looking so:

object(DOMElement)#330 (0) {} object(DOMNodeList)#335 (0) {}

But they are not empty as I can read the values.

What debugging options have I instead?

Upgrade to PHP 5.4 and you will get more information, what you describe is only the case with the older PHP 5.3 version. See also Debug a DOMDocument Object in PHP and PHP XML how to output nice format. — hakre
– hakre, Commented May 13, 2012 at 15:05

j0k · Accepted Answer · 2016-04-11 15:02:51Z

For a DomDocument I var_dump using the xml output.

var_dump($dom->saveXML());

For a DOMElement, I use (as seen here):

var_dump($domElement->ownerDocument->saveXML($domElement));

But DOMNodeList, I have no idea. Maybe you have to attach/append it to a DomDocument, and then var_dump it.

And btw, not showing internals of a DomDocument is reported (here: Reflection).

pathoc · Accepted Answer · 2013-03-11 14:17:01Z

Solution: i wrote own monitoring function 'dom_test'

 function dom_test($DOM) { echo '<h1>'.get_class($DOM).'</h1>'; // easiest way to traverse: echo 'LENGTH: '. @$DOM->length ."\n"; // if NodeList echo 'TAG: '. @$DOM->tagName ."\n"; // if Element echo 'CHILDS: '. @$DOM->childNodes->length ."\n"; // etc. }

hope this could help you!

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