https://learn.microsoft.com/en-us/dotnet/api/system.runtime.interopservices._methodbase.ispublic?view=netframework-4.8
_MethodBase.IsPublic Property (System.Runtime.InteropServices) | Microsoft Learn
Provides COM objects with version-independent access to the IsPublic property.
property systemruntimemicrosoftlearn
https://www.php.net/manual/tr/reflectionclassconstant.ispublic.php
PHP: ReflectionClassConstant::isPublic - Manual
Checks if class constant is public
phpmanual