Enum %s cannot implement the Serializable interface

Description

Enumeration cannot be serialized: they are created as needed by the PHP engine, during execution, and they will again at the next execution.

Example

<?php

enum E implements Serializable {
    case A;
}

?>

Literal Examples

• Enum E cannot implement the Serializable interface

Alternatives

• Remove the serializable implements.
• Make this enumeration a class.