enum.duplicateValue

Code example

<?php declare(strict_types = 1);

enum Priority: int
{
    case Low = 1;
    case Medium = 2;
    case High = 2;
    case Critical = 1;
}

Why is it reported?

A backed enum has multiple cases with the same backing value. Each case in a backed enum must have a unique value. PHP enforces this constraint and will throw a fatal error at runtime if two cases share the same value. In this example, Low and Critical both have value 1, and Medium and High both have value 2.

How to fix it

Assign unique values to each enum case:

 <?php declare(strict_types = 1);

 enum Priority: int
 {
     case Low = 1;
     case Medium = 2;
-    case High = 2;
-    case Critical = 1;
+    case High = 3;
+    case Critical = 4;
 }