If you want to recurse over a DOM then this might help:<?php/** * PHP's DOM classes are recursive but don't provide an implementation of  * RecursiveIterator. This class provides a RecursiveIterator for looping over DOMNodeList */classDOMNodeRecursiveIteratorextendsArrayIteratorimplementsRecursiveIterator{    public function__construct(DOMNodeList $node_list) {$nodes= array();    foreach($node_listas$node) {$nodes[] =$node;    }parent::__construct($nodes);      }    public functiongetRecursiveIterator(){    return newRecursiveIteratorIterator($this,RecursiveIteratorIterator::SELF_FIRST);  }    public functionhasChildren() {    return$this->current()->hasChildNodes();  }    public functiongetChildren() {    return newself($this->current()->childNodes);  }  }?>

In PHP 5.2.5 (Windows) it is not possible to iterate correctly over the DOMNodeList object returned by DOMNode->childNodes using foreach. Instead I had to use the for loop in conjunction with the item() method of DOMNodeList for iterating over all child nodes correctly.I don't know whether this is really a bug, but apparently it is.

It's worth to mention that DOMNodeList is not an Array,  so you have to convert first to an array before to use for, foreach or array_map, array_filter, array_walk functions.Use iterator_to_array to make the conversion ( since PHP 5.1.0 ) .<code>  /* @ suppress warning var_dump not yet implemented for class */@array_walk( iterator_to_array( $Some_NodeList ), 'var_dump' ) );foreach( iterator_to_array( $Some_NodeList ) as $node )    @var_dump( $node );</code>Hope is usefull.

Note that $length is calculated (php5.3.2).Iterating over a large NodeList may be time expensive.Prefer :$nb = $nodelist->length;for($pos=0; $pos<$nb; $pos++)Than:for($pos=0; $pos<$nodelist->length; $pos++)I had a hard time figuring that out...

You can modify, and even delete, nodes from a DOMNodeList if you iterate backwards:$els = $document->getElementsByTagName('input');for ($i = $els->length; --$i >= 0; ) {  $el = $els->item($i);  switch ($el->getAttribute('name')) {    case 'MAX_FILE_SIZE' :      $el->parentNode->removeChild($el);    break;    case 'inputfile' :      $el->setAttribute('type', 'text');    //break;  }}

I have done some testing and have found 2 results:(My System: Win XP with PHP 5.2.1)1) Iteration with foreach does function correctly as "james dot j dot hackett at gmail dot com" writes, _if_ you only do readonly stuff with foreach or minor writings of some attributes.2) foreach does not function, if you are doing some DOM-Operations while iterating. In my situation it was adding the iterated $node as an child to an new node:$newNode = $dom->createElement('newNode') ;foreach ($nodeList as $node) {  echo $node->nodeValue ;  $newNode->appendChild($node) ;}This only gives you the first element ...I'm interpreting it as an confusing but correct behavior because of the changes within the $dom-object while appending the node at an additional place ... So, if you want to do something like 2) use for, length and item() :)

In Response to 'kassah at gmail'You don't need to convert a DOMNodeList to an array in order iterate through it using 'foreach'.  You can use foreach directly with the DOMNodeList.$nodeList = $someDomDocument->getElementsbytagname('user');foreach ($nodeList as $node) {    echo $node->nodeValue;}

That's actually incorrect. You can use function results as objects. It makes building an API for your database very clean and neat. For example:Our code:$articles = Node::screate('tags', 123456)->assets('like:title:test')->articles;We use the above code to get articles that are linked to assets that are linked to a specific tag in our database.

Addition to my first note:An traditional for-loop does not allow you to change the DOM-tree while looping - the effects are the nearly the same as with foreach. So you have to collect the nodes in an array and do the tree-altering stuff within a second loop (looping the array this time ...)