php無限級分類

static public $treeList = array();

//tree
static public function tree($data, $pid = 0, $level = 1, $maxlevel = 6)
{
    foreach ($data as $k =>  $v) {
        if ($v['invite_id'] == $pid) {
            self::$treeList[] = $v;
            self::tree($data, $v['id'], $level + 1);
        }
    }
    return self::$treeList;
}