Add runtime checks for enum references in php

What version of the Codex App are you using (From “About Codex” dialog)?

26.602.71036

What subscription do you have?

Business Plan

What platform is your computer?

Darwin 25.5.0 arm64 arm

What issue are you seeing?

Problem

php -l only checks PHP syntax. It does not catch runtime symbol resolution errors such as:

• Wrong enum case access, e.g. SomeStatus::Pending when the enum defines PENDING

This allowed a status enum refactor bug to pass syntax checks but fail at runtime with 500 errors.

What steps can reproduce the bug?

php -l only checks PHP syntax. It does not catch runtime symbol resolution

What is the expected behavior?

_No response_

Additional information

_No response_