夺命雷公狗---无限级分类NO6

<?php
    header("Content-Type:text/html;charset=utf-8");
    $aarr = array(
        array(‘id‘=>1,‘name‘=>‘安徽‘,‘pid‘=>0),
        array(‘id‘=>2,‘name‘=>‘海淀‘,‘pid‘=>7),
        array(‘id‘=>3,‘name‘=>‘浣溪县‘,‘pid‘=>5),
        array(‘id‘=>4,‘name‘=>‘昌平‘,‘pid‘=>7),
        array(‘id‘=>5,‘name‘=>‘淮北‘,‘pid‘=>1),
        array(‘id‘=>6,‘name‘=>‘朝阳‘,‘pid‘=>7),
        array(‘id‘=>7,‘name‘=>‘北京‘,‘pid‘=>0),
        array(‘id‘=>8,‘name‘=>‘上地‘,‘pid‘=>2)
    );
    
    //家谱树的应用，如面包屑导航，首页 > 手机类型 > GSM手机 > iPhone > iPhone6s
    
    function familytree($arr,$id){
        $tree = array();
        foreach($arr as $v){
            if($v[‘id‘] == $id){
                if($v[‘pid‘] > 0){
                    $tree = array_merge($tree,familytree($arr,$v[‘pid‘]));
                }
                $tree[] = $v; //这里换下顺序北京就可以上前面去了
            }
        }
        return $tree;
    }
    
    echo "<pre>";
    print_r(familytree($aarr,8));  //上一课输出的顺序是：上海->海淀->北京