# 9.1.1 Hello World Block

**URL:** <https://forums.concretecms.org/t/9-1-1-hello-world-block/3195>\
**Category:** Marketplace\
**Created:** [June 7, 2022, 4:44am UTC](https://forums.concretecms.org/t/9-1-1-hello-world-block/3195 "2022-06-07T04:44:12Z")\
**Posts on this page:** 1\
**Showing post:** 2

<div class="post-metadata">

**Author:** ![Parasek](https://forums.concretecms.org/user_avatar/forums.concretecms.org/parasek/32/6277_2.png) [@Parasek](https://forums.concretecms.org/u/Parasek)\
**Post date:** [June 7, 2022, 6:01am UTC](https://forums.concretecms.org/t/9-1-1-hello-world-block/3195/2 "2022-06-07T06:01:08Z")

</div>

Hi

Downgrade php version on your server to 7.4 or fix those errors by yourself like:

> [@PHP 8 Error "Undefined property"](https://forums.concretecms.org/t/php-8-error-undefined-property/3122/2):
>
> Yeah, you need to add property in block controller public $fileOrder; An it will look something like that: class Controller extends BlockController { public $fileOrder; // rest of methods }

(maybe adding some isset($variableName) will be required besides that, but in general tip above should fix php8 errors).

---

_[View the full topic](https://forums.concretecms.org/t/9-1-1-hello-world-block/3195)._