syntax error, unexpected '|', expecting ';' or '{' about facebook-php-business-sdk

[natewiebe13]

It appears to me that you're on an older version of php than 8.0. It looks like the syntax is fine, but is using union types which was introduced in php 8.0. Is that the case here?

[xriter]

Ah, that could be it. It's running in a php 7.4 env indeed, because of other packages that are not compatible with php >= 8 yet. Would it be difficult to make it still compatible with 7.4?

[natewiebe13]

I do know a bunch of work has gone into making this package compatible with php 8.0/8.1, and removing return types I'm guessing isn't likely to happen, especially with 7.4 being EOL last year.

If you do need to maintain 7.4 support, I'd suggest either forking the repo, remove the return types that are causing issues and using that, or instead of a repo apply patches using something like https://github.com/cweagans/composer-patches

[xriter]

Makes sense. Thank you for your efforts. 🙏