<?php
class ParentClassWithPrivateAttributes
{
    private static $privateStaticParentAttribute = 'foo';
    private $privateParentAttribute              = 'bar';
}

class ParentClassWithProtectedAttributes extends ParentClassWithPrivateAttributes
{
    protected static $protectedStaticParentAttribute = 'foo';
    protected $protectedParentAttribute              = 'bar';
}

class ClassWithNonPublicAttributes extends ParentClassWithProtectedAttributes
{
    public static $publicStaticAttribute       = 'foo';
    protected static $protectedStaticAttribute = 'bar';
    protected static $privateStaticAttribute   = 'baz';

    public $publicAttribute       = 'foo';
    public $foo                   = 1;
    public $bar                   = 2;
    protected $protectedAttribute = 'bar';
    protected $privateAttribute   = 'baz';

    public $publicArray       = ['foo'];
    protected $protectedArray = ['bar'];
    protected $privateArray   = ['baz'];
}