Visibility from other objects

<?php
 class Test
 {
     private $foo;

     public function __construct($foo)
     {
         $this->foo=$foo;
     }

     public function bar()
     {
         echo ‘Accessed the private method.‘;
     }

     public function baz(Test $other)
     {
         //We can change the private property:
         $other->foo = ‘hello‘;
         var_dump($other->foo);

         //We can also call the private method:
        $other->bar();
     }
 }

$test = new Test(‘test‘);

$test->baz(new Test(‘other‘));

D:\wamp64\www\w\w.php:20:string ‘hello‘ (length=5)
Accessed the private method.