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Homephp教程php手册PHP如何通过传引用的思想实现无限分类(代码简单)

本文给大家介绍php引用传递,如何通过引用出的思想实现无限分类,代码超简单,需要的朋友可以借鉴下

无限级分类,主要是通过储存上级分类的id以及分类路径来实现

在我的Simpla中,,用到了无限分类,使用了PHP的传引用思想实现无限分类的方法,可以完美展示类似这样的分类模式。

id   pid   name
1    0     四川
2    0     重庆
3    1     成都
4    1     绵阳
5    3     高新区

代码如下所示:

/** * 数组变成无限级分类--传引用思想 * @param array $items * @return array */ public static function get_tree($orig) { //解决下标不是1开始的问题 $items = array(); foreach ($orig as $key => $value) { $items[$value[‘id‘]] = $value; } //开始组装 $tree = array(); foreach ($items as $key => $item) { if ($item[‘pid‘] == 0) { //为0,则为1级分类 $tree[] = &$items[$key]; } else { if (isset($items[$item[‘pid‘]])) { //存在值则为二级分类 $items[$item[‘pid‘]][‘child‘][] = &$items[$key]; //传引用直接赋值与改变 } else { //至少三级分类 //由于是传引用思想,这里将不会有值 $tree[] = &$items[$key]; } } } return $tree; }

以上内容很简单吧,如有错误或者更好的方法,希望可以相互交流。谢谢。!

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