class-visibility

Private and protected classes for PHP.

Private and protect classes known from some strongly typed languages helps keep cleaner dependencies and promotes good code organization.

Private classes

Private classes can only be used by classes defined inside the exact same namespace. Ex. class SomeNamespace\Abc\SomeClassName can be used by SomeNamespace\Abc\OtherClass but not by SomeNamespace\Abc\NestedNamespace\SomeClassFromNestedNamespace, and cannot be used by any class from outside of SomeNamespace\Abc namespace.

Protected classes

Protected classes work slightly differently than in Java. Protected class can be used inside the exact same namespace, like private class, but it also can be used by classes from nested namespaces. Ex. class SomeNamespace\Abc\SomeClassName can be used by SomeNamespace\Abc\OtherClass and by SomeNamespace\Abc\NestedNamespace\SomeClassFromNestedNamespace

Declaring visibility

All you need to do to declare class visibility is to add the attribute.

use Lukasz93P\ClassVisibility\Visibility\Visibilities\PrivateVisibility;

#[PrivateVisibility(self::class)]
class ClassWithPrivateVisibility
{
}

use Lukasz93P\ClassVisibility\Visibility\Visibilities\ProtectedVisibility;

#[ProtectedVisibility(self::class)]
class ClassWithProtectedVisibility
{
}

Classes with no visibility attribute defined are considered public.

Check violations

To check if a given namespace violates visibility rules run

vendor/bin/class-visibility check <namespace to check>

or

vendor/bin/class-visibility check <namespace to check>,<another namespace>,<next namespace>