[Bug] Installer - strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated

[Rushaway]

What are the steps to reproduce this issue?

1. Run install until page 3

What happens?

What were you expecting to happen?

Don't throw php error

Any logs, error output, etc.?

Warning: Undefined variable $sql_version in /install/template/page.3.php on line 154
Deprecated: strpos(): Passing null to parameter #1 ($haystack) of type string is deprecated in /install/template/page.3.php on line 154

Any other comments?

What versions of software are you using?

Operating System: Ubuntu 22.04
SourceBans++ Version: 1.8.0 - 1410
PHP Version: 8.2
MySQL Version: 8
Link to your project: http://heizemod.one/
Link to a phpinfo() output: