Kevin Powell - Community•2w ago

PHP Syntax Issue.

I wrote a script while running PHP 8.4. The server this is going to run on is using 8.2. I can't change it, it's not my website. There is, apparently, a syntax difference between 8.4 and 8.2 when it comes to dynamically filling in both which Enum type and which case of that Enum it is I'm wanting to use, and now chunks of what I wrote no longer work. I didn't realize this would happen at the time. All of that to say, this works in 8.4:

$tierlevel::{$itemname}->getBenefits(); 
// this could be: Items\Enums\Tier0::Copycat->getBenefits();
// or it could be some other Tier/Item combo

$tierlevel::{$itemname}->getBenefits(); 
// this could be: Items\Enums\Tier0::Copycat->getBenefits();
// or it could be some other Tier/Item combo

But it doesn't in 8.2 (or 8.3). And this:

$test = constant($tierlevel::class . "::$itemname");

$test = constant($tierlevel::class . "::$itemname");

did not fix it, it just gave me a different fatal error. The original error: Fatal error: Uncaught Error: Access to undeclared static property Items\Enums\Tier0::$itemname is not helpful because it's not a static property in the first place, it's an Enum case. The interpreter is misinterpreting. Anybody know what I'm meant to do here? Or am I just SOL? I do have an alternative in mind that'll probably work, but I'd prefer doing this to that if I can. Thanks.

10 Replies

ἔρως•2w ago

you can try to use reflection to get access to the values ~~or just use eval~~

RayOP•2w ago

That worked and I learned a new thing, thank you

ἔρως•2w ago

you're welcome it's overcomplicated, but, im assuming this is just to use once

RayOP•2w ago

This is ultimately what I ended up doing because I did end up using it twice, so I just made a function:

private function getEnum(object|string $enum, string $case): object {

  $enum = new ReflectionEnumUnitCase($enum, $case);

  return $enum->getValue();

}

private function getEnum(object|string $enum, string $case): object {

  $enum = new ReflectionEnumUnitCase($enum, $case);

  return $enum->getValue();

}

made things more readable i might need to do that same thing elsewhere, i don't know yet, but for now it's living in the item class

ἔρως•2w ago

hey, it's good that it works i would assume it was a lot more complicated, but i only worked with reflection in 7.4

RayOP•2w ago

I've only ever glanced at it on php.net and didn't really understand what it was for or when I would need something like that, until now I guess lol I also thought it would be a lot more complicated, I had to try a couple different enum related reflection classes until I found that one

ἔρως•2w ago

lol i used it mostly to get information about functions that are public and private, and change from private to public to run those private functions

RayOP•2w ago

lol i never would've even thought to try something like that, i figured private meant that it belongs to the class and there's nothing you can do to use it somewhere else that's good to know though

ἔρως•2w ago

it was fun to use, not gonna lie

RayOP•2w ago

sounds that way

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PHP Syntax Issue.

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