thinkphp 控制器controller完成数据验证,validate()、create()

public function person_pic_post(){
    $uid = $this->userid;
    $rules = array(
        //array(验证字段,验证规则,错误提示,验证条件,附加规则,验证时间)
        array('acard', 'require', '身份证正面不能为空！', 1 ),
        array('bcard', 'require', '身份证反面不能为空！', 1 ),
    );
    $users_model=M("persion_info");
    if($data = $users_model->validate($rules)->create()){
        $data['utime'] = $this->ctime;
        $result=$users_model->where(array('uid'=>$uid))->save($data);
    }else{
        $this->error($users_model->getError());
    }

    if($result!==false){
        $this->success("认证成功！");
    }else{
        $this->error("认证失败！");
    }