RFC: Convert PSR-3 LogLevel to PHP 8.1+ Enum

[Junaid Farooq]

Hello PHP-FIG Community,

I'd like to propose a modernization enhancement to PSR-3 (Logger Interface) that would convert the current LogLevel class with string constants to a PHP 8.1+ backed enum while maintaining backward compatibility.

I have attached an md file to this email that mentions all the details of the RFC.

I believe this change represents a natural evolution that enhances PSR-3 without compromising the stability and wide adoption that makes it such a successful standard.

Thank you for your time and consideration. I look forward to the discussion.

Best regards,
Junaid Farooq

[Jordi Boggiano]

The main issue is that these are not equivalent because enums do not cast to string..

https://3v4l.org/TMoYI#v8.4.12

You'd have to use LogLevel::DEBUG->value to be equivalent. I had to do the same when migrating to enum for Monolog v3.

IMO this is not worth the breakage it'd cause.

Best,
Jordi

Junaid Farooq --
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Jordi Boggiano
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