traversal baum collection

baum-traversal.php

function render($html, $node)
{
	if($node->isRoot()) $html .= '<ul>';
	
	$html .= '<li>' . $node->name;
	
	if($node->children->count() > 0)
	{
		$html .= '<ul>';
		$html .= $node->children->reduce(render);
		$html .= '</ul>';
	}
	
	$html .= '</li>';
	
	if($node->isRoot()) $html .= '</ul>';
	
	return $html;
}

$tree = Category::all()->toHierarchy();
echo $tree->reduce(render);