1.2.1326. Use Enum Case In Constant Expression

Enum cases are constants, and may be used in constant definitions, as value. This is valid both with the case itself, or with their value, for the backed enum version.

<?php

enum A {
     case A;
}

enum B : string {
     case B = 'b';
}

class C {
     const C1 = A::A;
     const C2 = B::B->value;
}
?>

1.2.1326.1. Specs

Short name	Php/UseEnumCaseInConstantExpression
Rulesets	All, Appinfo, CompatibilityPHP53, CompatibilityPHP54, CompatibilityPHP55, CompatibilityPHP56, CompatibilityPHP70, CompatibilityPHP71, CompatibilityPHP72, CompatibilityPHP73, CompatibilityPHP74, CompatibilityPHP80, CompatibilityPHP81
Exakat since	2.5.3
PHP Version	With PHP 8.2 and more recent
Severity	Minor
Time To Fix	Quick (30 mins)
Precision	Medium
Available in	Entreprise Edition, Exakat Cloud