ThinkPHP菜單無極分類實現詳解與優化

 
// 父菜單ID
$parent_id = 0;
// 查詢條件
$where = [
    'parent_id' => $parent_id,
];
// 獲取所有菜單
$menu = D('Menu')->where($where)->order('id asc')->select();
// 循環處理菜單
foreach ($menu as $key => $value) {
    // 獲取子菜單
    $child_menu = D('Menu')->where(['parent_id' => $value['id']])->order('id asc')->select();
    // 如果有子菜單
    if (!empty($child_menu)) {
        // 處理子菜單
        foreach ($child_menu as $k => $v) {
            // 獲取子菜單的子菜单
            $sub_menu = D('Menu')->where(['parent_id' => $v['id']])->order('id asc')->select();
            // 如果有子菜單
            if (!empty($sub_menu)) {
                // 處理子菜單的子菜单
                foreach ($sub_menu as $kk => $vv) {
                    // 將子菜單的子菜單添加到子菜單數組中
                    $child_menu[$k]['child_menu'][] = $vv;
                }
            }
        }
    }
    // 將子菜單添加到菜單數組中
    $menu[$key]['child_menu'] = $child_menu;
}