simple_html_dom_node::children PHP Method

    function children($idx = -1)
    {
        if ($idx === -1) {
            return $this->children;
        }
        if (isset($this->children[$idx])) {
            return $this->children[$idx];
        }
        return null;
    }

 /**
  * @param \simple_html_dom_node $node
  */
 private function emptyNodeContent(\simple_html_dom_node $node)
 {
     $node->innertext = '';
     foreach ($node->children() as $child) {
         $this->emptyNodeContent($child);
     }
 }