tp框架(thinkPHP)实现三次登陆密码错误之后锁定账号功能示例

public function login_do(){    //账号    $username=$_POST['username'];    //密码    $pwd=$_POST['pwd'];    $user=M('表名');    $list=$user->where("username='$username'")->find();    $time=date("Ymd",time());    if($list['num']==0){      if($list['time']!=$time+1){        $this->error("您的账号已被锁定");      }    }    if($list){      if($list['pwd']==$pwd){        $data['id']=$list['id'];        $data['num']=3;        $user->save($data);        $this->success("登陆成功");      }else{        $list['num']=--$list['num'];        $data['num']=$list['num'];        $data['id']=$list['id'];        $data['time']=$time;        $user->save($data);        $this->error("密码错误，还可以输入".$list['num']."次");      }    }else{      $this->error("账号错误");    }}