    public function delete(){
        $item_id = I("item_id/d");  
        $login_user = $this->checkLogin();
        $uid = $login_user['uid'] ;
        if(!$this->checkItemManage($uid , $item_id)){
            $this->sendError(10303);
            return ;
        } 
        $item_member_id = I("item_member_id/d");

        if ($item_member_id) {
            $member_array = D("ItemMember")->where(" item_id = '%d' and item_member_id = '%d'  ",array($item_id,$item_member_id))->find();
            $ret = D("ItemMember")->where(" item_id = '%d' and item_member_id = '%d'  ",array($item_id,$item_member_id))->delete();

        }
        if ($ret) {
           $this->sendResult($ret);
        }else{
            $this->sendError(10101);
        }
    }
The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request.