transmute.php

protected function transmuteTags(DOMNode $contextNode = null)
    {
        $xpath = new DOMXPath($this);
        $tagList = $this->getTagList();
        
        if(!$contextNode) {
            $contextNode = $this->documentElement;
        }
        
        if($contextNode->hasChildNodes()) {
            foreach($contextNode->childNodes as $tag) {
                if($tagName = array_search($tag->nodeName, $tagList)) {
                    $tagClass = Dialplan::ns().'\\'.$tagName;
                    $newTag = new $tagClass;
                    $contextNode->replaceChild($newTag, $tag);
                    static::transmuteTag($tag, $newTag);
                    $this->transmuteTags($newTag);
                } else {
                    $this->transmuteTags($tag);
                }
            }
        }
    }
    
    protected static function transmuteTag(DOMNode $tag, DOMNode $newTag)
    {
        foreach($tag->attributes as $attribute) {
            $newTag->setAttributeNode($attribute);
        }
        foreach($tag->childNodes as $child) {
            $newTag->appendChild($child);
        }
    }