无限级分类的一种实现方式

list返回子孙树列表

 1 /**
 2  * * list返回子孙树
 3  * @param array $list 原始列表
 4  * @param int $parentid 父id
 5  * @param int $level 几级子孙
 6  * @param string $space 空格占位
 7  * @date:2017.2.17
 8  * @return array
 9  */
10 function treelist($list, $parentid = 0, $level = 0, $space = '  ')
11 {
12     static $bk = array();
13     foreach ($list as $each)
14     {
15         if ($each['parent_id'] == $parentid)
16         {
17             $each['level'] = $level;
18             $each['show'] = str_repeat($space, $level) . $each['name'];
19             $bk[$each['id']] = $each;
20             treelist($list, $each['id'], $level + 1, $space);//子孙紧跟在自己后面
21         }
22     }
23     return $bk;
24 }

 

list返回子孙树数组

 1 /**
 2  * * list返回子孙树
 3  * @param array $list 原始列表
 4  * @param int $parentid 父id
 5  * @param int $level 几级子孙
 6  * @param string $space 空格占位
 7  * @date:2017.2.17
 8  * @return array
 9  */
10 function treearr($list, $parentid = 0, $level = 0, $space = '  ')
11 {
12     $bk = array();
13     foreach ($list as $each)
14     {
15         if ($each['parent_id'] == $parentid)
16         {
17             $each['level'] = $level;
18             $each['show'] = str_repeat($space, $level) . $each['name'];
19             $each['sonarr'] = treearr($list, $each['id'], $level + 1, $space);
20             $bk[$each['id']] = $each;
21         }
22     }
23     return $bk;
24 }

 

如果只需要所有层级名称

/**
 * 获取所有层级名列表
 * @date:2017.2.17
 * @return array
 */
function getfulnamelist()
{
    $listraw = getlist();
    $list = array();
    //一些处理
    foreach ($listraw as $each)
    {
        $list[$each['id']] = iconvarray($each, 'gbk', 'utf-8');//gbk->utf-8
    }
    //加所有层级名
    foreach ($list as $id => $each)
    {
        $fulname = $list['name'];
        $parentid = $each['parent_id'];
        while ($parentid != 0 && $list[$parentid]['parent_id'] != 0)
        {
            $fulname = $list[$parentid]['name'].'_'.$fulname;
            $parentid = $list[$parentid]['parent_id'];
        }
        $list[$id]['fulname'] = $fulname;
    }
    return $list;
}

 

//获取所有子孙

 1 function getspringid($selfid, $list)
 2 {
 3     $springidarr = array();
 4     $parentidarr = array($selfid => $selfid);
 5     do
 6     {
 7         $newsonarr = array();
 8         foreach ($list as $each)
 9         {
10             if (isset($parentidarr[$each['parent_id']]))
11             {
12                 $springidarr[$each['id']] = $each['id'];
13                 $newsonarr[$each['id']] = $each['id'];
14             }
15         }
16         $parentidarr = $newsonarr;//新一辈父
17     } while (count($parentidarr) > 0);
18 
19     return $springidarr;
20 }