I accidentally Cmd+clicked on an `fopen` call in code, and it opened standard_5.php, with things underlined in red, like that `default` thing (nevermind all of the silly HTML inside of the block comments, I don't know why that's there), giving an error about PHP 8 compatibility, but my Language Level for the repo project right now is PHP 5.6 (SORRY! I can't update it right now, I just have to work with it until we can update it).
Can someone explain this? I'm not sure what to think of this. PHPStorm is directing me to reference code that it says is broken... so... like... show me proper reference code?