Online PHP editor | output for 3Z5Jb

<?php class Simple { private $complicated; public function setComplicated(Complicated $complicated) { $this->complicated = $complicated; } public function __construct() { echo 'test1 '; } public function __destruct() { echo 'exit1 '; } } //Допустим есть еще некий класс Complicated, который может в себе содержать ссылку на класс Simple. class Complicated { private $simple; public function setSimple(Simple $simple) { $this->simple = $simple; } public function __construct() { echo 'test2 '; } public function __destruct() { echo 'exit2 '; } } $simple = new Simple(); $complicated = new Complicated(); $simple->setComplicated($complicated); $complicated->setSimple($simple); unset($simple); unset($complicated); echo 'end';