<?php

use Pamil\Enum\Enum;

/**
 * @method static static active()
 * @method static static inactive()
 */
final class SampleEnum extends Enum
{
    protected const active = 1;
    protected const inactive = 2;
}

通过标识符比较您的枚举

var_dump(SampleEnum::active() === SampleEnum::active()); // true

注意事项

当通过构造函数创建枚举时，它不起作用

var_dump(new SampleEnum(1) === SampleEnum::active()); // false

当您反序列化序列化的枚举时，它不起作用

var_dump(unserialize(serialize(SampleEnum::active())) === SampleEnum::active());