示例:
include 'tree.php';
$data=array(
1 => array('id'=>'1','parentid'=>0,'name'=>'一級欄目一'),
2 => array('id'=>'2','parentid'=>0,'name'=>'一級欄目二'),
3 => array('id'=>'3','parentid'=>1,'name'=>'二級欄目一'),
4 => array('id'=>'4','parentid'=>1,'name'=>'二級欄目二'),
5 => array('id'=>'5','parentid'=>2,'name'=>'二級欄目三'),
6 => array('id'=>'6','parentid'=>3,'name'=>'三級欄目一'),
7 => array('id'=>'7','parentid'=>3,'name'=>'三級欄目二'),
8 => array('id'=>'8','parentid'=>3,'name'=>'三級欄目三'),
9 => array('id'=>'9','parentid'=>7,'name'=>'四級分類三'),
);
$tree = new Tree($data);
// 如果使用數組, 請使用 getArray方法
//$tree->getArray();
// 下拉菜單選項使用 get_tree方法
$html='';
$str = "\$spacer\$name";
$html .= $tree->get_tree(0,$str,-1).'';
echo $html;
效果示範截圖:
![](https://img.laitimes.com/img/__Qf2AjLwojIjJCLyojI0JCLicmbw5SNkdjZwEWYlN2YmljY1ETYklDOygjZzQmZ3QzMzY2M18CX0JXZ252bj91Ztl2Lc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)