issue with php version?

[jorigel]

get this error in the log starting jirafeau :

---begin---
PHP Fatal error: Array and string offset access syntax with curly braces is no longer supported in /var/www/html/paste/lib/functions.php on line 30
---end---

my DEBIAN system is using :
php -v
PHP 8.0.8 (cli) (built: Jul 1 2021 16:14:13) ( NTS )

what to do about it but using an older php-version?
thanks for Your attention.