## The Problem Tools like PHPStorm, PHPCS, and Psalm complain that `$c` is not defined. Same thing with `$f`. ## Possible Cause It is not defined anywhere in the file, so tools don't know what to think of it.
The Problem
Tools like PHPStorm, PHPCS, and Psalm complain that
$cis not defined. Same thing with$f.Possible Cause
It is not defined anywhere in the file, so tools don't know what to think of it.