Bug PHP 8 errors and warnings

[Karelke]

On XenForo 2.2.9, the following warnings are present with PHP 8.

Tools used: GitHub - PHPCompatibility/PHPCompatibility: PHP Compatibility check for PHP_CodeSniffer

Code:

FILE: /usr/src/myapp/src/XF/Captcha/HCaptcha.php

----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

FOUND 1 ERROR AFFECTING 1 LINE...

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