树形数据处理

public function getDeptTree() {
        $deptdata = Db::table(‘dept‘)->field(‘dept_name,dept_no,p_id‘)->select();
        $showdata = $this->getTree($deptdata, $p_id = 0, $depth = 0);
        $data = json($showdata);
        return $data;
    }
    // //部门树形数据组装
    public function getTree($treedata, $p_id, $depth) {
        $retnArr = array();
        if (!empty($treedata)) {
            foreach ($treedata as $key => $info) {
                if ($info[‘p_id‘] == $p_id) {
                    $info[‘depth‘] = $depth;
                    $temp_info = $info;
                    foreach ($treedata as $subinfo) {
                        if ($subinfo[‘p_id‘] == $info[‘dept_no‘]) {
                            $temp_info[‘sub‘] = $this->getDeptTree($treedata, $info[‘dept_no‘], $depth + 1);
                        } 
                    }
                    $retnArr[] = $temp_info;
                } 
            } 

        } 
        return $retnArr;
    }

<script>
  //页面加载
  $(function(){
    //递归遍历方法
    function getTrees(obj,data){
        for(var i=0;i<data.length;i++){
          var ul = $("<ul></ul>");
          var childli= $(‘<li><span class="folder">‘+data[i][‘dept_name‘]+‘</span></li>‘);
          childli.appendTo(obj).append(ul);
          if(data[i][‘sub‘]){
            getTrees(ul,data[i][‘sub‘]);
          }
        }     
    }
//页面加载时发送异步请求返回json类型树形数据，进行递归处理
    $.ajax({
            url: "{:url(‘deptc/getDeptTree‘)}",
            type: ‘post‘,
            dataType: ‘json‘,
            error: function(data) {
                console.log(data);
            },
            success: function(data) {
                  // var li=$(‘<li><span class="folder">‘+data[0][‘dept_name‘]+‘</span></li>‘);
                  // $(li).appendTo($(‘#tree‘));
                  getTrees($("#tree"),data);
                  $("#tree").treeview();
              }
        });
  });

</script>