When used with PHP 7.4.24, the script generates a PHP warning:
PHP Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /var/www/prod/mediawiki/extensions/ParserFunctions/includes/ExprParser.php on line 242
No warning in MW 1.31.15 with PHP 7.2.24.
Minor problem, I just wanted to mention ist.