    public function deleteUser(){
        $login_user = $this->checkLogin();
        $this->checkAdmin();
        $uid = I("uid/d");

        if (D("Item")->where("uid = '$uid' and is_del = 0 ")->find()) {
           $this->sendError(10101,"该用户名下还有项目，不允许删除。请先将其项目删除或者重新分配/转让"); 
           return ;
        }
        $return = D("User")->delete_user($uid);
        if (!$return) {
            $this->sendError(10101);
        }else{
            $this->sendResult($return);
        }
    }
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.