gan_node_html.php
function hasParent($tag = null, $recursive = false) {
		if ($this->parent !== null) {
			if ($tag === null) {
				return true;
			} elseif (is_string($tag)) {
				return (($this->parent->tag === $tag) || ($recursive && $this->parent->hasParent($tag)));
			} elseif (is_object($tag)) {
				return (($this->parent === $tag) || ($recursive && $this->parent->hasParent($tag)));
			}
		}

		return false;
	}
function hasParent($tag = null, $recursive = false) {
		if ($this->parent !== null) {
			if ($tag === null) {
				return true;
			} elseif (is_string($tag)) {
				return (($this->parent->tag === $tag) || ($recursive && $this->parent->hasParent($tag)));
			} elseif (is_object($tag)) {
				return (($this->parent === $tag) || ($recursive && $this->parent->hasParent($tag)));
			}
		}

		return false;
	}
Find out if node has (a certain) parent
@param DomNode|string $tag Match against parent, string to match tag, object to fully match node, null to return if node has parent
@param bool $recursive
@return bool