//获取表单 select 的无限极分类    $data 所有的数据  $pId 父级ID  第三个为默认值  第四个为 间隔
public function getTree_select($data, $pId ,$default,$space){        $html = ‘‘;        $space_nbsp=‘‘;        $nbsp="&nbsp;&nbsp;&nbsp;&nbsp;";        if($space){            for($i=0;$i<$space;$i++){                $space_nbsp.=$nbsp;            }                        $space_nbsp.=‘└─‘;         }else{                        $space_nbsp=‘‘;        }                $space++;        foreach($data as $k => $v)        {                      if($v[‘adpid‘] == $pId)           {                if($default==$v[‘adsortid‘]){                    $selected=‘selected="selected"‘;                    }else{                    $selected=‘‘;                }                               $html .= "<option $selected>".$space_nbsp.$v[‘subject‘]."</option>";            $html .= $this->getTree_select($data, $v[‘adsortid‘],$default,$space);             }        }        return $html  ;    }         public function is_sub($data, $pId){                  $bean=0;        foreach($data as $k => $v)        {                      if($v[‘adpid‘] == $pId)           {                     $bean=1;           }         }                               return $bean;     }     //用上 获取  表格的 tr  class_one为有展开图标的  class_two 是无展开图标的      public function getTree_tr($data, $pId ,$space){        $html = ‘‘;        $class_one=‘class="tdBG"‘;        $class_two=‘class="tdBG1"‘;                $class=$class_one;                $padding=15;        $space_nbsp=‘‘;        $nbsp="&nbsp;&nbsp;&nbsp;&nbsp;";                if($space){            $class=$class_two;                if($space>1){                $p_left=$padding*$space;                $p_left.=‘px‘;                $space_nbsp=" style=‘margin-left:$p_left‘";            }else{                $space_nbsp=" style=‘margin-left:15px‘";            }        }else{                        $space_nbsp=‘‘;        }            $space++;        foreach($data as $k => $v)        {                      if($v[‘adpid‘] == $pId)           {                            if($this->is_sub($data, $v[‘adsortid‘]) || $pId==0){                   $class=$class_one;                }else{                    $class=$class_two;                    }                        $html .= ‘<tr><td>‘.$v[‘adsortid‘].‘</td>                <td  align="left"><strong><span ‘.$class.‘ ‘.$space_nbsp.‘>‘.$v[‘subject‘].‘</span></strong></td>                <td><a href=http://www.mamicode.com/"/goods/ad/adcat_add.html?adsortid=‘.$v[‘adsortid‘].‘">修改</a> | <a href=http://www.mamicode.com/"/goods/ad/adcat_delete.html?adsortid=‘.$v[‘adsortid‘].‘" onclick="return confirm(\‘确认删除么？\‘)">删除</a></td>                 </tr>‘;            $html .= $this->getTree_tr($data, $v[‘adsortid‘],$space);             }        }        return $html  ;    }