模型

/*
 * 獲取分類列表 * @is_show : 是否顯示，預設顯示全部 0：表示讀取不顯示的， 1：表示讀取顯示的 */
public function getCategoryList($is_show = ""){
if(!empty($is_show)){
$condition['category.is_show'] = $is_show;
$res = $this->model->leftJoin("module", "module.m_id", "=", "category.m_id")->where($condition)->orderBy("sort"
 
)->get();
    }else{
$res = $this->model->leftJoin("module", "module.m_id", "=", "category.m_id")->orderBy("sort")->get();
    }
return $res;
}

控制器

$cat = $this->model->getCategoryList();
//var_dump($cat);
$tree = new CategoryTree($cat);
$category = $tree->getList();

CategoryTree類
 

namespace App\Libraries;
class CategoryTree{
private $tree = [];
private $list = [];
private $options;
private $category;
public function __construct($category)
    {
$this->category = $category;
    }
/*
     * 獲取分類樹型陣列     */
public function getTreeList(){
$parent = $this->category->where(
 
'parent_id', 0);
if(count($parent) > 0){
foreach($parent as $item) {
$this->tree[$item['cid']]['cid'] = $item['cid'];
$this->tree[$item['cid']]['module_name'] = trans("common.".$item['m_module']);
$this->tree[$item['cid']]['cat_name'] = $item['cat_name'];
$this->tree[$item['cid']]['cat_ename'] = $item['cat_ename'];
$this->tree[$item['cid']]['parent_id'] = $item['parent_id'];
$this->tree[$item['cid']]['depth'] = $item['depth'];
$this->tree[$item['cid']]['cat_path'] = $item['cat_path'];
$this->tree[$item['cid']]['path'] = $item['path'];
$this->tree[$item['cid']]['m_id'] = $item['m_id'];
$this->tree[$item['cid']]['is_show'] = $item['is_show'];
$this->tree[$item['cid']]['keywords'] = $item['keywords'];
$this->tree[$item['cid']]['description'] = $item['description'];
$this->tree[$item['cid']]['sort'] = $item['sort'];
$this->tree[$item['cid']]['style'] = "";
if($item['cid']){
$this->tree[$item['cid']]['children'] = $this->_getChildren($item['cid']);
                }
            }
        }
return $this->tree;
    }
/*
     * 遞迴獲取子分類     */
protected function _getChildren($cid){
$children = $this->category->where("parent_id", $cid);
$treeArr = [];
if(count($children) > 0){
foreach($children as $item)  {
$treeArr[$item['cid']]['cid'] = $item['cid'];
$treeArr[$item['cid']]['module_name'] = trans("common.".$item['m_module']);
$treeArr[$item['cid']]['cat_name'] = $item['cat_name'];
$treeArr[$item['cid']]['cat_ename'] = $item['cat_ename'];
$treeArr[$item['cid']]['parent_id'] = $item['parent_id'];
$treeArr[$item['cid']]['depth'] = $item['depth'];
$treeArr[$item['cid']]['cat_path'] = $item['cat_path'];
$treeArr[$item['cid']]['path'] = $item['path'];
$treeArr[$item['cid']]['m_id'] = $item['m_id'];
$treeArr[$item['cid']]['is_show'] = $item['is_show'];
$treeArr[$item['cid']]['keywords'] = $item['keywords'];
$treeArr[$item['cid']]['description'] = $item['description'];
$treeArr[$item['cid']]['sort'] = $item['sort'];
if($item['depth'] == 2){
$this->tree[$item['cid']]['style'] = "﹂";
                }else{
$this->tree[$item['cid']]['style'] = "﹋";
                }
if($item['cid']){
$treeArr[$item['cid']]['children'] = $this->_getChildren($item['cid']);
                }
            }
        }
return $treeArr;
    }
/*
     * 獲取options列表     */
public function getOptionsList(){
$parent = $this->category->where('parent_id', 0);
if(count($parent) > 0){
foreach($parent as $item) {
$this->options .= "<option value='".$item['cid']."'>".$item['cat_name']."</option>";
if($item['cid']){
$this->options .= $this->_getOptionsChildren($item['cid']);
                }
            }
        }
return $this->options;
    }
/*
     * 遞迴獲取子分類     */
protected function _getOptionsChildren($cid){
$children = $this->category->where("parent_id", $cid);
$optionsStr = "";
if(count($children) > 0){
foreach($children as $item)  {
$optionsStr .= "&nbsp;|";
$optionsStr .=  "<option value='".$item['cid']."'>".$item['cat_name']."</option>";
if($item['cid']){
$optionsStr .= $this->_getOptionsChildren($item['cid']);
                }
            }
        }
return $optionsStr;
    }
/**
     * 獲取當前id的子ID
     * @param int $layer 當前層級
*/
public function getList($pid = 0, $pname="", $depth=0)
    {
$this->list    = empty($depth) ? array() : $this->list;
if(empty($pname)){
$pname = trans('common.top_cat');
        }
foreach($this->category as $k => $row)
        {
/**
             * 如果父ID為當前傳入的id
             */
if($row['parent_id'] == $pid)
            {
//如果當前遍歷的id不為空
$row['parent_name'] = $pname;
$row['module_name'] = trans("common.".$row['m_module']);
$this->list[]    = $row;
//var_array($arr);
$this->getList($row['cid'], $row['cat_name'], $row['depth']+1);//遞迴呼叫
}
        }
return $this->list;
    }
}